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GB 55004-2021: Code for Construction of Steel-Concrete Composite Structures Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
GB 55004-2021: Code for Construction of Steel-Concrete Composite Structures---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/GB55004-2021GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA UDC Code for Construction of Steel-Concrete Composite Structures Issued on. APRIL 09, 2021 Implemented on. JANUARY 01, 2022 Issued by. Ministry of Housing and Urban-Rural Development of the PRC; State Administration for Market Regulation. Table of ContentsForeword... 3 1 General... 6 2 Basic Provisions... 7 3 Materials... 9 3.1 Steel and reinforcement... 9 3.2 Concrete... 10 3.3 Wood... 10 3.4 Fibre reinforced composite materials... 11 4 Design of Structure System... 13 4.1 General rules... 13 4.2 Building structure system... 13 4.3 Bridge structure system... 15 5 Design of Composite Member... 17 5.1 General provisions... 17 5.2 Steel-concrete composite beam... 17 5.3 Steel-concrete composite slabs... 18 5.4 Concrete-filled steel tube members... 19 5.5 Steel-reinforced concrete members... 19 5.6 Steel-concrete composite shear wall... 19 5.7 Steel-concrete composite bridge deck system... 20 5.8 Timber composite member... 20 5.9 Composite members of composite material... 21 6 Construction and Acceptance... 23 6.1 Construction... 23 6.2 Acceptance... 23 7 Maintenance and Demolition... 25 7.1 Maintenance... 25 7.2 Demolition... 261 General1.0.1 This Code is formulated, aiming to ensure the quality and safety of composite structure projects, promote the promotion and application of composite structures, protect the ecological environment, ensure the safety of people's lives and property and personal health, and improve the level of green development of composite structure projects. 1.0.2 The composite structure projects must implement this Code. 1.0.3 Whether the technical methods and measures adopted in the project construction meet the requirements of this Code shall be determined by the relevant responsible entities. Among them, innovative technical methods and measures shall be demonstrated and meet the relevant performance requirements in this Code.2 Basic Provisions2.0.1 The safety level of composite structures and members shall be no lower than Class-II. When the safety level of the composite structure and the member is inconsistent, it shall be clearly marked in the design document. 2.0.2 The design working life of the composite structure shall meet the following requirements. 2.0.3 Within the design working life, the performance of the composite structure shall meet the following requirements. 2.0.4 Within the design working life, measures shall be taken to ensure the safe use of the composite structure and members, and shall meet the following requirements.3 Materials3.1 Steel and reinforcement 3.1.1 The steel for composite structure shall meet the following requirements. 3.1.2 Reinforcing bars for composite structure shall meet the following requirements. 3.2 Concrete 3.2.1 The concrete used in the composite structure shall meet the following requirements. 3.3 Wood 3.3.1 The wood, bonding materials and supporting materials in the composite structure shall meet the following requirements. 3.4 Fibre reinforced composite materials 3.4.1 Fibre-reinforced composite materials for composite structures shall meet the following requirements.4 Design of Structure System4.1 General rules 4.1.1 The design of the composite structure system shall consider the impact of the difference in the properties of different materials, and shall meet the following requirements. 4.1.2 When designing composite structures and members, priority shall be given to structures, members and joints that are simple in structure, convenient in construction, and in line with the requirements of industrialized construction. 4.2 Building structure system 4.2.1 The analysis and calculation model of the building composite structure system shall simulate the characteristics of the cooperative force when different materials, members or systems are combined. 4.2.4 For high-rise buildings of a combined structure with a height greater than 150m, they shall meet the requirements for wind-vibration comfort. Under the action of the 10-year wind load standard value, the maximum acceleration limit of the downwind and across-wind vibration of the structure apex shall meet the requirements of Table 4.2.4. 4.2.5 When designing in the normal service limit state, the steel-concrete composite Acceleration limitUse function 4.3 Bridge structure system 4.3.1 The bridge structure shall be checked against overturning as a whole; and reliable connection construction measures shall be provided between the main beam, cap beam, and pier columns to prevent falling beams and overturning, etc. 4.3.4 The design of the concrete-filled steel tube arch bridge shall meet the following requirements. 4.3.5 The concrete and crack widths of composite bridges and bridge decks shall meet the following requirements.5 Design of Composite Member5.1 General provisions 5.1.1 The composite structural members shall be subjected to the limit state checking calculation of the bearing capacity and the limit state checking calculation of the normal service; and the structural performance of the composite structure within the design working life shall be guaranteed. 5.2 Steel-concrete composite beam 5.2.1 The checking calculation of design of steel-concrete composite beam shall meet the following requirements. 5.2.2 The checking calculation of the flexural capacity of the steel-concrete composite beam section shall meet the following requirements. 5.3 Steel-concrete composite slabs 5.3.1 For steel-concrete composite slabs, the longitudinal shear bond bearing capacity shall be checked. 5.3.2 The total thickness of the steel-concrete composite slab shall be no less than 90mm; and the thickness of the steel substrate of profiled steel sheet shall be no less than 0.7mm. 5.5 Steel-reinforced concrete members 5.5.1 Stirrup reinforcement area shall be set at the column end and beam end of the steel reinforced concrete frame. The length of the reinforcement area shall be no less than 2h0, when the seismic level is one. In other cases, the length of the reinforcement area shall be no less than 1.5 h0 (h0 is the height of the column section or height of beam). 5.5.2 When there is a fire protection requirement, the steel concrete members shall take measures to prevent the concrete bursting under the high temperature of the fire. 5.6 Steel-concrete composite shear wall 5.6.1 A reliable connection structure shall be set between the encased steel plate of the wall and the inner concrete of the encased steel plate composite shear wall. The bearing capacity of the connectors shall meet the requirements of shear force transmission requirements between the steel plate and the concrete; 5.7 Steel-concrete composite bridge deck system 5.7.1 The design of the steel-concrete composite bridge deck system shall comply with the following requirements. 5.8 Timber composite member 5.8.1 The design checking calculation of timber-steel composite member shall meet the following requirements. 5.9 Composite members of composite material 5.9.1 Composite members of composite material shall be designed and checked according to the requirements of the bearing capacity in limit state and the serviceability in limit state; and shall have the deformability to reach the bearing capacity in limit state. 5.9.2 The design and structure of composite members of composite material shall meet the following requirements. 5.9.3 Under long-term load, the ratio of the equivalent stress in the composite member of composite material to the standard value of the material strength shall meet the following requirements. 5.9.4 The design checking calculation of the composite material tube compression members under normal use in the limit state shall meet the following requirements.6 Construction and Acceptance6.1 Construction 6.1.1 The construction of steel-concrete composite structure should analyse the influence of different material construction methods and construction sequence on the structure. 6.1.2 The steel-concrete joints shall not have voids and imperfections in the concrete that affect the safety of the structure. 6.1.7 Waterproof, moisture-proof and anti-corrosion measures shall be taken for timber composite members during processing and installation. 6.1.8 Protective measures shall be taken during the construction of carbon fibre structure to avoid damage to the surrounding live equipment. After the completion of the construction, the residual carbon fibre materials on the site shall be cleaned up in time. 6.2 Acceptance 6.2.1 The acceptance of steel-concrete composite structure shall cover all parts such as steel members, steel bars and concrete at the same time; and the method of segmented acceptance shall be adopted for concealed procedures. 6.2.2 In the main structure and its steel members, the internal defects of the primary and secondary welds that are designed to require full penetration shall be inspected by non-destructive testing methods. The primary welds shall take 100% internal defect inspection, and the secondary weld inspection ratio It shall be no less than 20%. 6.2.5 The quality acceptance of the connection between the steel bar and the steel member in the steel-concrete composite member shall meet the following requirements.7 Maintenance and Demolition7.1 Maintenance 7.1.1 The user of the composite structure shall establish a structure use and maintenance management system during the whole life cycle according to the structure safety level, structure type, design working life and use environment, and which shall meet the following requirements. 7.1.2 When one of the following situations occurs in the use of the composite structure, it shall be tested and identified; and dealt with according to the test and identification results. 7.2 Demolition 7.2.1 The demolition of the composite structure shall be analysed and checked; and safe and green demolition technology shall be adopted to ensure the safety during the demolition of the structure and reduce the impact on the surrounding environment. The unitized dismantling plan of members shall be adopted, and the disassembly of composite members shall not be carried out at the demolition site. 7.2.4 The demolition of steel members and steel-concrete members shall be divided into demolition units and concrete crushing units according to the structure type. During the demolition process, the stable state of the structure and members to be demolished shall be monitored; and the operation must be stopped when safety hazards are found. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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