JGJT487-2020 PDF EnglishUS$1145.00 · In stock · Download in 9 seconds
JGJT487-2020: Technical standard for control of building vibration with wind load Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsJGJ/T 487-2020: Technical standard for control of building vibration with wind load---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JGJT487-2020UDC JGJ NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA P JGJ/T 487-2020 Record No.. J2848-2020 Technical Standard for Control of Building Vibration with Wind Load Issued on. JUNE 29, 2020 Implemented on. NOVEMBER 01, 2020 Issued by. Ministry of Housing and Urban-Rural Development of the People’s Republic of China NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Technical Standard for Control of Building Vibration with Wind Load Approved by. Ministry of Housing and Urban-Rural Development of the People’s Republic of China Implemented on. NOVEMBER 01, 2020 2020 Beijing No.145 [2020] Announcement of the Ministry of Housing and Urban-Rural Development of the People’s Republic of China ForewordAccording to the requirements of the Ministry of Housing and Urban-Rural Development’s Notice on Issuing (Formulation and Revision Plan of Engineering Construction Standards and Specifications in 2013) (JB[2013]No.6), after extensive investigation and research, the standard formulation group carefully summed up practical experience, referred to relevant international standards and advanced foreign standards, and compiled this standard on the basis of extensive solicitation of opinions. The main technical contents of this Standard include. 1 General Provisions; 2 Terms and Symbols; 3 Basic Requirements; 4 Wind Load; 5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper; 6 Wind-Induced Structural Vibration Control Based on Tuned Mass/Liquid Damper; 7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper; 8 Seismic Resistance Design Requirements for Wind-Induced Structural Vibration Control System. This Standard was managed by the Ministry of Housing and Urban-Rural Development; and was interpreted technical contents by Harbin Institute of Technology. If any comments or suggestions arises during the implementation process, please send them to Harbin Institute of Technology (Address. Room 309, School of Civil Engineering, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin; Zip code. 150090) Chief drafting organization of this Standard. Harbin Institute of Technology Participating drafting organization of this Standard. Dalian University of Technology; Tongji University; Harbin Institute of Technology (Shenzhen); Guangzhou University; City University of Hong Kong; Beijing University of Technology; Beijing Institute of Architectural Design; China Academy of Building Research; China Electronics Engineering Design Institute Co., Ltd.; China Southwest Architectural Design and Research Institute Co., Ltd.; and CCDI International Design Consulting Co., Ltd. Chief drafting staffs of this Standard. Ou Jinping, Li Hui, Zhang Dongyu, Jin Xignyan, Chen Wenli, Gu Ming, Xiao Yiqing, Lou Yu, Guo Anxin, Feng Yuan, Tan Ping, Teng Jun, Yang Weibiao, Wu Bin, Fu Xueyi, Li Qiusheng, Yan Weiming, Guan Xinchun, Li Luyu, and Laima Shujin. Chief auditors of this Standard. Xu Jian, Yu Yinquan, Liang Shuguo, Xie Zhuangning, Li Shengyong, Zhang Lingxin, Xu Zhaodong, Li Shouying, and Duan Yuanfeng.Table of Contents1 General Provisions... 7 2 Terms and Symbols... 8 3 Basic Requirements... 12 4 Wind Load... 19 4.1 General requirements... 19 5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper... 30 6 Wind-Induced Structural Vibration Control Based on Tuned Mas/Liquid Damper. 38 7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper... 47 8 Seismic Resistance Design Requirements for Wind Vibration Control System... 57 Explanation of Wording in This Standard... 58 List of Quoted Standards... 591 General Provisions1.0.1 This Standard is formulated in order to reduce wind-induced vibration of building structures, improve structural safety, applicability and comfort; correctly use vibration control technology; achieve advanced technology, reasonable economy, safety and applicability, and ensure quality. 1.0.2 This Standard applies to the design, inspection and installation of wind-induced structural vibration control systems for new and existing building structures; it does not apply to long- span roof structures. 1.0.3 The combined system of controlled building structures and wind-induced structural vibration control system can also be used for structural seismic resistance control; when it is also used for structural seismic resistance control, it shall meet both the structural wind resistance and seismic resistance design requirements at the same time. 1.0.4 The design, inspection and installation of the wind-induced structural vibration control system of the building structure shall not only comply with the provisions of this Standard, but also comply with the provisions of current relevant national standards.2 Terms and Symbols2.1 Terms 2.1.1 Controlled structure The building structure installed wind-induced structural vibration control system. 2.1.2 Wind-induced structural vibration control system Components and devices that are installed on the controlled structure to provide control force for the structure, increase structural damping or change the structural stiffness to reduce the wind-induced response of the structure. 2.1.3 Combined system of controlled building structures and wind-induced vibration control system The system that is composed of controlled structure and wind-induced structural vibration control system. 2.1.4 Designed wind load The wind load that is used in the wind vibration control design and wind vibration response checking calculation of the controlled structure, including equivalent wind load and wind load time-history.3 Basic Requirements3.1 General requirements 3.1.1 The wind-induced structural vibration control system should be selected according to the following provisions. 3.1.5 The wind-induced structural vibration control system shall meet the following requirements. 3.1.7 For controlled structures with seismic-resistance fortification requirements, the influence of wind-induced structural vibration control system on the structure's seismic response shall be considered. When the wind-induced structural vibration control system is also used for the seismic control of the controlled structure, the design of the wind-induced structural vibration control system shall be carried out according to the relevant provisions of Clause 8 of this Standard and the current national standard GB 50011 Code for Seismic Design of Buildings. 3.1.8 Design documents shall indicate the performance parameters of the wind-induced structural vibration control system, and the wind-induced structural vibration control system or its components shall be tested according to the requirements of this Standard. 3.2 Calculation of controlled structural responses subject to wind load 3.3 Design requirements of the wind-induced structural vibration control system 3.3.1 The allowable value of the control force of the wind-induced structural vibration control system should be greater than 1.2 times the design value of the control force; the allowable value of the displacement and velocity of the wind-induced structural vibration control system should be greater than 1.2 times the design value, respectively. 3.3.6 Measures shall be taken during the construction process to avoid damaging the anti- corrosion paint, and the anti-corrosion condition shall be checked after installation. 3.4 Testing of the wind-induced structural vibration control system 3.4.1 Before installing different types of wind-induced structural vibration control systems, the systems or components shall be inspected according to the provisions of the corresponding Clauses of this Standard. 3.4.2 The inspection of viscous and viscoelastic dampers shall comply with the provisions of Subclause 5.4 of this Standard. 3.4.3 The inspection of tuned mass/liquid dampers and active-passive hybrid tuned mass dampers shall meet the following requirements.4 Wind Load4.1 General requirements 4.1.1 When the along-wind direction vibration of the controlled structure is dominated by the first-order vibration, the along-wind equivalent wind load can be calculated according to the relevant provisions in Subclause 4.2 of this Standard. 4.1.2 When the facade of the controlled structure is regular and the plane is circular or rectangular, the equivalent wind load of the across-wind and torsional wind vibration can be calculated according to the relevant provisions of Subclause 4.3 of this Standard. 4.1.4 The wind load time history used in the design and check calculation of the wind vibration control of the controlled structure should meet the following requirements. 4.2 Equivalent wind load of the structural along-wind direction vibration The equivalent wind load area of the controlled structure along the wind direction shall take the maximum projected area perpendicular to the wind direction; the standard value of the equivalent wind load per unit area perpendicular to the building surface can be calculated according to the following Formula. 4.2.3 When taking into account the addition damping ratio provided by the wind-induced structural vibration control system to the controlled structure, the resonance component factor of the fluctuating wind load can be calculated according to the following Formula. 4.3.6 The equivalent wind loads of the along-wind direction vibration, the across-wind direction vibration, and torsional wind vibration should consider the combined wind load conditions specified in the current national standard GB 50009 Load Code for the Design of Building Structures. 4.4.3 The fluctuating wind load along the height of the controlled structure can be calculated according to the following Formula.5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper5.1 General requirements 5.1.1 The performance of the viscous damper and viscoelastic damper controlled by wind vibration shall meet the following requirements. 5.2 Damping force model 5.2.1 When the equivalent linear model is adopted, the control force of viscous and viscoelastic dampers should be calculated according to the following Formula. 5.2.3 The equivalent linear stiffness and damping coefficient of the viscous damper should be calculated according to the following Formula. 5.3 Design specification 5.3.1 When using the equivalent wind load method to calculate the wind vibration response of the controlled structure, the equivalent linear model of the damper shall be used. 5.3.2 When using the time-history analysis method to calculate the wind vibration response of the controlled structure, the total mechanical model of the combined system of controlled building structures and wind-induced vibration control system including the controlled structure mechanical model and the damper mechanical model shall be used. 5.5 Connection and installation 5.5.1 The viscous damper should be connected by joints at both ends, so that the connecting parts can only bear axial deformation. 5.5.2 The liquid of the viscous damper should be non-toxic, non-corrosion, non-flammable and non-explosive. 5.5.3 During the installation process, the viscoelastic damper should be protected so that the damper can only bear shear deformation; and there should be no out-of-plane deformation leading to tearing of the damper.6 Wind-Induced Structural Vibration Control Based on Tuned Mas/Liquid Damper6.1 General requirements 6.1.1 The tuned mass/liquid damper should be arranged on the top layer of the controlled structure or at the peak of the controlled vibration mode. When controlling the torsional wind vibration of the controlled structure, Two tuned mass/liquid dampers should be arranged on the top layer of the controlled structure or at peak of the controlled vibration mode far away from the centroid; or one tuned mass/liquid damper is arranged eccentrically. 6.2 Mechanical parameters of tuned mass/liquid damper 6.2.1 The design documents shall indicate the following parameters. 6.2.2 The natural circular frequency, damping ratio and mass participation coefficient of the tuned liquid damper with the rectangular water tank can be calculated according to the following Formula. v - viscosity coefficient of the fluid. 6.2.4 The natural circular frequency, damping ratio and mass participation coefficient of the tuned liquid damper with the U-shaped water tank can be calculated according to the following Formula. 6.3 Design specification 6.3.1 The control force of the tuned mass/liquid damper acting on the controlled structure should be determined by the following Formula. 6.5.3 The water tank of the tuned liquid damper shall be closely connected with the structure to ensure that the water tank and the structure move together without relative slippage; the water tank of the tuned liquid damper shall not overturn during operation. 6.5.4 After the tuned liquid damper system is installed, water shall be injected to test the airtightness of the water tank.7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper7.1 General requirements 7.1.1 The design of the wind-induced structural vibration control system of the active-passive hybrid tuned mass damper shall not only comply with the provisions of this Clause, but also comply with the relevant provisions of tuned mass damper in Clause 6. 7.2 Design specification 7.2.1 The design documents shall indicate the following performance parameters of the active- passive hybrid tuned mass damper, such as inertial mass, stiffness coefficient, damping coefficient, natural frequency, damping ratio, calculation method of active control force and damper stroke, velocity, and the design value and allowable value of the control force, etc. 7.2.2 The design of the inertial mass, stiffness coefficient and damping coefficient of the active- passive hybrid tuned mass damper should meet the following requirements. 7.2.3 The active control force of the active-passive hybrid tuned mass damper can be determined according to the following Formula. 7.3.3 The instruction manual of the driving device shall include the following parameters. 8 Other relevant mechanical and electrical parameters. 7.3.4 The system dynamics model of active-passive hybrid tuned mass damper used for control algorithm design shall be determined through experiments. operators and users. 7.4.6 When the hybrid tuned mass damper is accepted, the hardware and software of the control system shall be run together for joint debugging; the operation test shall be carried out, and the test acceptance report shall be provided. 7.4.7 After the hybrid tuned mass damper is installed, on-site debugging shall be carried out; and the measured wind-induced structural vibration control effect of the controlled structure shall be no lower than 15% of the design control effect.8 Seismic Resistance Design Requirements for Wind Vibration Control System8.0.1 When the wind-induced structural vibration control system of viscous damper and viscoelastic damper is used for the seismic response control of the controlled structure, it shall meet the following requirements. 8.0.3 The wind-induced structural vibration control system of the tuned liquid damper should not consider its damping effect. JGJ/T 487-2020 UDC JGJ NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA P JGJ/T 487-2020 Record No.. J2848-2020 Technical Standard for Control of Building Vibration with Wind Load Issued on. JUNE 29, 2020 Implemented on. NOVEMBER 01, 2020 Issued by. Ministry of Housing and Urban-Rural Development of the People’s Republic of China NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Technical Standard for Control of Building Vibration with Wind Load Approved by. Ministry of Housing and Urban-Rural Development of the People’s Republic of China Implemented on. NOVEMBER 01, 2020 2020 Beijing No.145 [2020] Announcement of the Ministry of Housing and Urban-Rural Development of the People’s Republic of ChinaForewordAccording to the requirements of the Ministry of Housing and Urban-Rural Development’s Notice on Issuing (Formulation and Revision Plan of Engineering Construction Standards and Specifications in 2013) (JB[2013]No.6), after extensive investigation and research, the standard formulation group carefully summed up practical experience, referred to relevant international standards and advanced foreign standards, and compiled this standard on the basis of extensive solicitation of opinions. The main technical contents of this Standard include. 1 General Provisions; 2 Terms and Symbols; 3 Basic Requirements; 4 Wind Load; 5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper; 6 Wind-Induced Structural Vibration Control Based on Tuned Mass/Liquid Damper; 7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper; 8 Seismic Resistance Design Requirements for Wind-Induced Structural Vibration Control System. This Standard was managed by the Ministry of Housing and Urban-Rural Development; and was interpreted technical contents by Harbin Institute of Technology. If any comments or suggestions arises during the implementation process, please send them to Harbin Institute of Technology (Address. Room 309, School of Civil Engineering, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin; Zip code. 150090) Chief drafting organization of this Standard. Harbin Institute of Technology Participating drafting organization of this Standard. Dalian University of Technology; Tongji University; Harbin Institute of Technology (Shenzhen); Guangzhou University; City University of Hong Kong; Beijing University of Technology; Beijing Institute of Architectural Design; China Academy of Building Research; China Electronics Engineering Design Institute Co., Ltd.; China Southwest Architectural Design and Research Institute Co., Ltd.; and CCDI International Design Consulting Co., Ltd. Chief drafting staffs of this Standard. Ou Jinping, Li Hui, Zhang Dongyu, Jin Xignyan, Chen Wenli, Gu Ming, Xiao Yiqing, Lou Yu, Guo Anxin, Feng Yuan, Tan Ping, Teng Jun, Yang Weibiao, Wu Bin, Fu Xueyi, Li Qiusheng, Yan Weiming, Guan Xinchun, Li Luyu, and Laima Shujin. Chief auditors of this Standard. Xu Jian, Yu Yinquan, Liang Shuguo, Xie Zhuangning, Li Shengyong, Zhang Lingxin, Xu Zhaodong, Li Shouying, and Duan Yuanfeng.Table of Contents1 General Provisions... 7 2 Terms and Symbols... 8 3 Basic Requirements... 12 4 Wind Load... 19 4.1 General requirements... 19 5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper... 30 6 Wind-Induced Structural Vibration Control Based on Tuned Mas/Liquid Damper. 38 7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper... 47 8 Seismic Resistance Design Requirements for Wind Vibration Control System... 57 Explanation of Wording in This Standard... 58 List of Quoted Standards... 591 General Provisions1.0.1 This Standard is formulated in order to reduce wind-induced vibration of building structures, improve structural safety, applicability and comfort; correctly use vibration control technology; achieve advanced technology, reasonable economy, safety and applicability, and ensure quality. 1.0.2 This Standard applies to the design, inspection and installation of wind-induced structural vibration control systems for new and existing building structures; it does not apply to long- span roof structures. 1.0.3 The combined system of controlled building structures and wind-induced structural vibration control system can also be used for structural seismic resistance control; when it is also used for structural seismic resistance control, it shall meet both the structural wind resistance and seismic resistance design requirements at the same time. 1.0.4 The design, inspection and installation of the wind-induced structural vibration control system of the building structure shall not only comply with the provisions of this Standard, but also comply with the provisions of current relevant national standards.2 Terms and Symbols2.1 Terms 2.1.1 Controlled structure The building structure installed wind-induced structural vibration control system. 2.1.2 Wind-induced structural vibration control system Components and devices that are installed on the controlled structure to provide control force for the structure, increase structural damping or change the structural stiffness to reduce the wind-induced response of the structure. 2.1.3 Combined system of controlled building structures and wind-induced vibration control system The system that is composed of controlled structure and wind-induced structural vibration control system. 2.1.4 Designed wind load The wind load that is used in the wind vibration control design and wind vibration response checking calculation of the controlled structure, including equivalent wind load and wind load time-history.3 Basic Requirements3.1 General requirements 3.1.1 The wind-induced structural vibration control system should be selected according to the following provisions. 3.1.5 The wind-induced structural vibration control system shall meet the following requirements. 3.1.7 For controlled structures with seismic-resistance fortification requirements, the influence of wind-induced structural vibration control system on the structure's seismic response shall be considered. When the wind-induced structural vibration control system is also used for the seismic control of the controlled structure, the design of the wind-induced structural vibration control system shall be carried out according to the relevant provisions of Clause 8 of this Standard and the current national standard GB 50011 Code for Seismic Design of Buildings. 3.1.8 Design documents shall indicate the performance parameters of the wind-induced structural vibration control system, and the wind-induced structural vibration control system or its components shall be tested according to the requirements of this Standard. 3.2 Calculation of controlled structural responses subject to wind load 3.3 Design requirements of the wind-induced structural vibration control system 3.3.1 The allowable value of the control force of the wind-induced structural vibration control system should be greater than 1.2 times the design value of the control force; the allowable value of the displacement and velocity of the wind-induced structural vibration control system should be greater than 1.2 times the design value, respectively. 3.3.6 Measures shall be taken during the construction process to avoid damaging the anti- corrosion paint, and the anti-corrosion condition shall be checked after installation. 3.4 Testing of the wind-induced structural vibration control system 3.4.1 Before installing different types of wind-induced structural vibration control systems, the systems or components shall be inspected according to the provisions of the corresponding Clauses of this Standard. 3.4.2 The inspection of viscous and viscoelastic dampers shall comply with the provisions of Subclause 5.4 of this Standard. 3.4.3 The inspection of tuned mass/liquid dampers and active-passive hybrid tuned mass dampers shall meet the following requirements.4 Wind Load4.1 General requirements 4.1.1 When the along-wind direction vibration of the controlled structure is dominated by the first-order vibration, the along-wind equivalent wind load can be calculated according to the relevant provisions in Subclause 4.2 of this Standard. 4.1.2 When the facade of the controlled structure is regular and the plane is circular or rectangular, the equivalent wind load of the across-wind and torsional wind vibration can be calculated according to the relevant provisions of Subclause 4.3 of this Standard. 4.1.4 The wind load time history used in the design and check calculation of the wind vibration control of the controlled structure should meet the following requirements. 4.2 Equivalent wind load of the structural along-wind direction vibration The equivalent wind load area of the controlled structure along the wind direction shall take the maximum projected area perpendicular to the wind direction; the standard value of the equivalent wind load per unit area perpendicular to the building surface can be calculated according to the following Formula. 4.2.3 When taking into account the addition damping ratio provided by the wind-induced structural vibration control system to the controlled structure, the resonance component factor of the fluctuating wind load can be calculated according to the following Formula. 4.3.6 The equivalent wind loads of the along-wind direction vibration, the across-wind direction vibration, and torsional wind vibration should consider the combined wind load conditions specified in the current national standard GB 50009 Load Code for the Design of Building Structures. 4.4.3 The fluctuating wind load along the height of the controlled structure can be calculated according to the following Formula.5 Wind-Induced Structural Vibration Control Based on Viscous and Viscoelastic Damper5.1 General requirements 5.1.1 The performance of the viscous damper and viscoelastic damper controlled by wind vibration shall meet the following requirements. 5.2 Damping force model 5.2.1 When the equivalent linear model is adopted, the control force of viscous and viscoelastic dampers should be calculated according to the following Formula. 5.2.3 The equivalent linear stiffness and damping coefficient of the viscous damper should be calculated according to the following Formula. 5.3 Design specification 5.3.1 When using the equivalent wind load method to calculate the wind vibration response of the controlled structure, the equivalent linear model of the damper shall be used. 5.3.2 When using the time-history analysis method to calculate the wind vibration response of the controlled structure, the total mechanical model of the combined system of controlled building structures and wind-induced vibration control system including the controlled structure mechanical model and the damper mechanical model shall be used. 5.5 Connection and installation 5.5.1 The viscous damper should be connected by joints at both ends, so that the connecting parts can only bear axial deformation. 5.5.2 The liquid of the viscous damper should be non-toxic, non-corrosion, non-flammable and non-explosive. 5.5.3 During the installation process, the viscoelastic damper should be protected so that the damper can only bear shear deformation; and there should be no out-of-plane deformation leading to tearing of the damper.6 Wind-Induced Structural Vibration Control Based on Tuned Mas/Liquid Damper6.1 General requirements 6.1.1 The tuned mass/liquid damper should be arranged on the top layer of the controlled structure or at the peak of the controlled vibration mode. When controlling the torsional wind vibration of the controlled structure, Two tuned mass/liquid dampers should be arranged on the top layer of the controlled structure or at peak of the controlled vibration mode far away from the centroid; or one tuned mass/liquid damper is arranged eccentrically. 6.2 Mechanical parameters of tuned mass/liquid damper 6.2.1 The design documents shall indicate the following parameters. 6.2.2 The natural circular frequency, damping ratio and mass participation coefficient of the tuned liquid damper with the rectangular water tank can be calculated according to the following Formula. v - viscosity coefficient of the fluid. 6.2.4 The natural circular frequency, damping ratio and mass participation coefficient of the tuned liquid damper with the U-shaped water tank can be calculated according to the following Formula. 6.3 Design specification 6.3.1 The control force of the tuned mass/liquid damper acting on the controlled structure should be determined by the following Formula. 6.5.3 The water tank of the tuned liquid damper shall be closely connected with the structure to ensure that the water tank and the structure move together without relative slippage; the water tank of the tuned liquid damper shall not overturn during operation. 6.5.4 After the tuned liquid damper system is installed, water shall be injected to test the airtightness of the water tank.7 Wind-Induced Structural Vibration Control Based on Active-Passive Hybrid Tuned Mass Damper7.1 General requirements 7.1.1 The design of the wind-induced structural vibration control system of the active-passive hybrid tuned mass damper shall not only comply with the provisions of this Clause, but also comply with the relevant provisions of tuned mass damper in Clause 6. 7.2 Design specification 7.2.1 The design documents shall indicate the following performance parameters of the active- passive hybrid tuned mass damper, such as inertial mass, stiffness coefficient, damping coefficient, natural frequency, damping ratio, calculation method of active control force and damper stroke, velocity, and the design value and allowable value of the control force, etc. 7.2.2 The design of the inertial mass, stiffness coefficient and damping coefficient of the active- passive hybrid tuned mass damper should meet the following requirements. 7.2.3 The active control force of the active-passive hybrid tuned mass damper can be determined according to the following Formula. 7.3.3 The instruction manual of the driving device shall include the following parameters. 8 Other relevant mechanical and electrical parameters. 7.3.4 The system dynamics model of active-passive hybrid tuned mass damper used for control algorithm design shall be determined through experiments. operators and users. 7.4.6 When the hybrid tuned mass damper is accepted, the hardware and software of the control system shall be run together for joint debugging; the operation test shall be carried out, and the test acceptance report shall be provided. 7.4.7 After the hybrid tuned mass damper is installed, on-site debugging shall be carried out; and the measured wind-induced structural vibration control effect of the controlled structure shall be no lower than 15% of the design control effect.8 Seismic Resistance Design Requirements for Wind Vibration Control System8.0.1 When the wind-induced structural vibration control system of viscous damper and viscoelastic damper is used for the seismic response control of the controlled structure, it shall meet the following requirements. 8.0.3 The wind-induced structural vibration control system of the tuned liquid damper should not consider its damping effect. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of JGJT487-2020 be delivered?Answer: The full copy PDF of English version of JGJT487-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of JGJT487-2020_English with my colleagues?Answer: Yes. The purchased PDF of JGJT487-2020_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- JGJT487-2020 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of JGJT487-2020?A step-by-step guide to download PDF of JGJT487-2020_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "JGJT487-2020". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
