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[GB/T 20688.5-2014] Rubber bearings -- Part 5: Elastic sliding seismic-protection isolator for buildings
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Basic data | Standard ID | GB 20688.5-2014 (GB20688.5-2014) | | Description (Translated English) | [GB/T 20688.5-2014] Rubber bearings -- Part 5: Elastic sliding seismic-protection isolator for buildings | | Sector / Industry | National Standard | | Classification of Chinese Standard | G47 | | Classification of International Standard | 83.140.99 | | Word Count Estimation | 32,383 | | Date of Implementation | 10/1/2015 | | Quoted Standard | GB/T 528; GB/T 1033.1; GB/T 1040.2; GB/T 3280; GB/T 3398.1; GB/T 6031; GB/T 7759; GB/T 7760; GB/T 7762; GB/T 15256; GB/T 20688.1-2007; GB 20688.3-2006 | | Regulation (derived from) | People's Republic of China Announcement of Newly Approved National Standards 2014 No. 24 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard specifies the building isolated elastic slide bearings terms and definitions, symbols, classification, requirements, test methods, inspection rules, signs and labels. This section applies to the building structure with isolated elastic slide | GB 20688.5-2014: [GB/T 20688.5-2014] Rubber bearings -- Part 5: Elastic sliding seismic-protection isolator for buildings
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rubber bearings.Part 5. Elastic sliding seismic-protection isolator for buildings
ICS 83.140.99
G47
National Standards of People's Republic of China
Rubber bearings
Part 5. Building isolation elastic slide bearings
Rubberbearings-
Part 5. Elasticslidingseismic-protectionisolatorforbuildings
Issued on. 2014-10-10
2015-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Symbol 3
5 Category 4
Requirement 6 6
7 Test Method 12
16 8 Inspection Rules
9 logo and labels 19
Wire wear coefficient test methods in Appendix A (normative) slip slide bearing material 21
Appendix B (normative) slip slide bearing material compression modulus of elasticity of 23 Test Method
Annex C (normative) Test method for slide bearing shear performance 26
Figure 1 seat Type 5
Flatness Measurement 2 10
Level 3 rubber bearing portion 10 offset measurement
4 compression test device 15 schematic
5 compression shear test apparatus 16 schematic
Figure B.1 Test Equipment 24
Figure C.1 slide bearing horizontal force - displacement hysteretic curve 27
Table 1 rubber physical properties of materials 6
Table 2 Physical properties of the slip material 7
Table 3 Mechanical Properties of slide bearings 7
Table 4 appearance quality 8
Table 5 rubber bearing portion bias claim 9
Table 6 plane size and thickness tolerance slip material 10
Table 7 slip material gap between the grooves and the steel plate 10
Table 8 slip plane size and thickness of the panel to allow deviation 11
Table 9 connecting plate diameter and edge length tolerance 11
Table 10 connecting plate thickness tolerance 11
Table 11 bolt hole location tolerance 12
Table 12 rubber physical properties of the pilot project 17
Table 13 slide bearing mechanical test item 18
Foreword
6.2,6.5.1,6.5.2.2,6.6.3,8.2.1 this section and section 8.2.2 in bold are mandatory, the rest are recommended.
GB 20688 "rubber bearing" is divided into five parts.
--- Part 1. Test methods for isolation rubber bearings;
--- Part 2. bridge rubber bearing;
--- Part 3. Building isolation rubber bearings;
--- Part 4. ordinary rubber bearing;
--- Part 5. Building isolation elastic slide bearings.
This section GB 20688 Part 5.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Rubber and rubber products, rubber sundries Standardization Technical Committee Technical Committee (SAC/TC35/SC7)
Centralized.
Drafting this Part. Earthquake Engineering Research Center, Guangzhou University, Beijing Chemical Products Quality Supervision and Inspection Station, China Building Research Institute
Study Institute, China Building Standard Design and Research Institute, Nanjing University of Technology, Lanzhou University of Technology, Beijing University of Technology, Yunnan Earthquake Engineering Research Institute,
Zhuzhou Times New Material Technology Co., Ltd., Hengshui shock isolation Thai Equipment Co., Ltd., Hengshui Rubber Co., Ltd., Wuxi San Feng Jian
New building Material Co., Ltd., Jiangyin Haida Rubber and Plastic Co., Ltd., Fortress Rubber Technology Development Co., Ltd.
The main drafters of this section. Zhou Fulin, Tan Ping, Ma Yuhong, towards Shen Yong, Jin Jianmin, Huang Yun Xiang, Yang Yang Chen, Song Baoqing, Xueyan Tao, had Germany and China,
Liu Weiqing, Wang Shuguang, Du Yongfeng, Su Jingyu, An Xiaowen, Yu Mitsutada.
Rubber bearings
Part 5. Building isolation elastic slide bearings
1 Scope
This section GB 20688 specifies the construction isolated elastic slide bearings terms and definitions, symbols, classification, requirements, test methods, inspection
Rules, signs and labels.
This section applies to the building structure with isolated elastic slide bearings, hereinafter referred to as slide bearings.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 528 Determination of vulcanized rubber or thermoplastic rubber tensile stress-strain properties
1033.1 Non-plastic foam density measurement GB/T Part 1. Immersion method, liquid pyknometer method and titration method
GB /1040.2 T Plastics Determination of tensile properties - Part 2. Test plastics molding and extrusion conditions
GB/T 3280 stainless steel cold-rolled steel sheet and strip
GB/T 3398.1 Determination of plastic hardness - Part 1. Ball indentation method
GB/T 6031 Determination of vulcanized rubber or thermoplastic rubber hardness (10 ~ 100IRHD)
GB/T 7759 vulcanized rubber, thermoplastic rubber at room temperature, high and low temperature compression set determination
Determination of GB/T 7760 vulcanized rubber or thermoplastic rubber rigid substrate adhesion strength of 90 ° peel method
GB/T 7762 vulcanized rubber or thermoplastic rubber resistant to ozone cracking static tensile test
GB/T 15256 vulcanized rubber - Determination of low-temperature brittleness (multiple test piece method)
GB/T 20688.1-2007 rubber bearing - Part 1. Test methods for isolation rubber bearings
GB 20688.3-2006 rubber bearing - Part 3. Building isolation rubber bearings
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Flexible slide bearing elasticslidingbearing; ESB
By the Ministry of rubber bearings, sliding materials, sliding panels and the upper and lower webs consisting of isolators.
3.2
Rubber bearing portion rubberbearingcomponent
By the internal and internal steel laminated rubber vulcanization integrally formed abutment portion.
3.3
Slip material slidingmaterial
Friction and sliding panels, providing material slip function.
3.4
Sliding panel slidingplate
Provide friction slip function panel.
3.5
Dynamic friction coefficient slidingfrictioncoefficient
The ratio of positive pressure and friction between the friction sliding friction.
3.6
Failure failure
By the press - Rupture slide bearing shear loading induced deformation slip or skid panel material damage, as well as slide bearing horizontal position
Move beyond the sliding panel outside.
3.7
Pressure - Shear test apparatus compressive-sheartestingmachine
Means for testing the performance of the bearing slide, having the ability to apply shear loads at constant pressure.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.4.
3.8
Rubber protective layer coverrubber
Wrapped in rubber and internal steel interior side of the outer rubber layer.
[GB/T 20688.1-2007, the definition 3.5]
3.9
Design stress designcompressivestress
The design uses a compressive stress on the slide bearing.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.6.
3.10
Effective pressure area effectiveloadedarea
Rubber bearing portion subjected to vertical load area equal to the area of the plane internal rubber.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.7.
3.11
Effective width effectivewidth
Square section rubber bearing internal steel side.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.8.
3.12
Effective diameter effectivediameter
Diameter of the circular portion of the rubber bearings inside steel.
3.13
The first form factor 1stshapefactor
Than the effective pressure area to its side rubber layer in each area of the rubber bearing unit.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.11.
3.14
The second form factor 2ndshapefactor
For a circular rubber bearing portion, the internal diameter of the inner rubber layer thickness ratio of total rubber.
For rectangular rubber bearing section, the effective width of the internal rubber layer and the internal rubber total thickness ratio.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.12.
3.15
Interior rubber innerrubber
Internal rubber layer between the multi-plate rubber bearing portion.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.16.
3.16
The maximum compressive stress maximumcompressivestress
Acting on the slide bearing maximum compressive stress of an earthquake.
NOTE. rewrite GB/T 20688.1-2007, definitions 3.17.
3.17
Flexible horizontal slide bearing performance shearpropertiesofelasticslidingbearing
Elastic slide bearings (ESB) dynamic coefficient of friction (μ) and the initial stiffness (K1).
3.18
The elastic limit skateboard bearing performance ultimatepropertiesofelasticslidingbearing
In the press - shear load bearing plate performance decline at failure.
4 Symbol
The following symbols apply to this document.
A --- slip material confined area;
As --- slide bearing pressure area;
c --- slip plane slip chamfer side panel;
Dd --- circular rubber bearing portion connecting plate outer diameter;
DS --- circular slip material diameter or square edge length slip material;
Dr --- circular rubber bearing plate portion internal diameter;
D '--- circular or square rubber bearing portion includes an outer diameter or side length of the protective layer thickness;
E1 --- slip material compressive modulus of elasticity;
F --- slip material compressive failure load;
Fv --- slide bearing compressive failure load;
fsv --- slide bearing compressive strength;
fv --- slip material compressive strength;
H1 --- upper connecting plate and the rubber bearing assembly portion of the total height (excluding slip material thickness);
H2 --- upper connecting plate thickness;
H3 --- rubber bearing portion on the cover plate thickness;
H4 --- sliding panel thickness;
H5 --- rubber bearings men closure plate thickness;
H6 --- lower connecting plate thickness;
K1 --- slide bearing initial stiffness;
Kv --- slide bearing vertical compressive stiffness;
Slip surface L1 --- slip panel side;
Lf --- By connecting plate side;
PS --- circular rubber bearings and connecting plate portion embedded parts connected to the bolt hole pitch diameter;
Sd --- square rubber bearing portion connecting plate side;
Sr --- Square effective rubber bearing rubber layer side;
Ss --- square rubber bearing portion connecting plate on the side bolt hole center distance;
δH --- rubber bearings of the horizontal offset;
δv --- flatness deviation rubber bearing portion, that is the difference between two points 180 ° apart, as measured in seat height;
ε0.7 times --- slip material accumulated 0.7 times the benchmark stress load under compressive strain;
ε1.3 times --- slip material accumulated in the 1.3 times the benchmark stress load under compressive strain.
μ --- slide bearing dynamic friction coefficient;
σ0 --- slip material in the reference stress compressive stress under load;
σ0.7 times --- slip material in 0.7 times the benchmark compressive stress compressive stress under load;
σ1.3 times --- slip material in 1.3 times the benchmark compressive stress compressive stress under load;
Flatness Ψ --- rubber bearing portion.
Category 5
5.1 According to the shape classification
In accordance with the shape of the rubber bearing portion can be divided into circular slide bearings [see Figure 1a)] and square [see Figure 1b)] categories.
Millimeters
a) round b) Square
Explanation.
1 --- upper connecting plate;
2 --- on the cover plate;
3 --- Under the cover plate;
4 --- lower connecting plate;
5 --- sliding panel;
6 --- slip material.
Figure 1 type of support
5.2 Push friction coefficient Categories
In accordance with the dynamic coefficient of friction, slide bearings can be divided into the following three categories.
--- Low friction slide bearing. μ < 0.03;
--- Friction slide bearings. 0.03≤μ≤0.06;
--- High-friction slide bearing. μ > 0.06.
6 Requirements
6.1 rubber physical properties of materials requirements
Rubber physical properties of materials and the corresponding test methods shall be in accordance with Table 1, the rubber material shear modulus of not less than 0.392MPa.
Table 1 rubber physical properties of materials
No. Performance Test Project test requirements apply Article No.
Stretching
performance
Tensile Strength
Elongation at break
100% elastic modulus of tensile strain
Appendix B shall comply with GB 20688.3-2006
Provision of natural rubber bearings
Within the tolerances specified range prior to the test
7.1.1
Ageing
performance
Tensile strength change rate of ± 25%
Variation of elongation pull off ≥ -50%
Error rate within the range of elastic modulus variation of tensile strain at 100% prior to the test specified
7.1.2
3 hardness hardness within the tolerances specified in 7.1.3 before the test
4 adhesive properties of rubber to metal bonding strength
GB 20688.3-2006 shall comply with Appendix B
Provisions
7.1.4
5 compression performance compression permanent deformation within the tolerances specified in 7.1.5 prior to the test
6 Shear Performance
Shear modulus
Equivalent damping ratio
Shear modulus and equivalent damping ratio of temperature phase
Relevance
Destruction of shear strain
The performance requirements shall be specified prior to the test
Deviation in the range of
7.1.6
7 within the tolerances brittleness temperature brittle performance prior to the test specified in 7.1.7
8 ozone resistance of rubber should not change the appearance of cracks appear 7.1.8
The rate of change within the tolerances hardness 9 low temperature crystallization performance prior to the test specified in 7.1.9
Hardness can be used as an indicator of quality control, but not as the main design specifications.
NOTE. The main ozone resistance against external rubber protective layer test.
6.2 slip material requirements
Slide bearing material can be used for sliding panels polytetrafluoroethylene, modified UHMWPE plate, its physical properties and the corresponding test
Test method shall be in accordance with Table 2; slide bearing material should be used with slip molded from virgin powder should not be used for turning the plate, so that prohibited
Recycled materials and feed back. PTFE raw material average particle size not greater than 50μm.
Table 2 Physical properties of the slip material
Project modified PTFE plate UHMWPE plate number applicable test strip
Density/(g/cm3) 2.14 ~ 2.20 0.93 ~ 0.98 7.2.1
Tensile strength/MPa ≥ 30 30
Tensile strain at break /% ≥ 300 250
7.2.2
Ball indentation hardness H132/60/MPa 23.0 ~ 33.0 26.4 ~ 39.6 7.2.3
Wire wear coefficient /% ≤ 6 3 7.2.4
Ultimate compressive strength/MPa ≥ 80 80 7.2.5
Compressive elastic modulus/MPa ≥ 360 360 7.2.6
Slip material should be non-porous material, thickness should not be less than 5mm, embedded depth should not be less than 1/2 the thickness, exposed thickness should not be less than
2mm, in the course of testing and non-slip material on the surface coated with oil or grease, etc; no peeling, cracking, delamination or other damage
Injury destructive phenomenon. When using PTFE sliding material, subject to the back surface activation treatment, mosaic and glued the lower seal plate; use
When the modified UHMWPE slip material, solid-slip material should be embedded in the lower sealing plate. If necessary both materials mechanically
fixed.
6.3 Sliding panel material requirements
When the sliding panel is steel, should be made of stainless steel, chromium content should be not less than 18%. Recommendation inland areas. the use of stainless steel
In line with GB/T 3280 provisions 06Cr19Ni10,06Cr19Ni13Mo3; coastal and inland corrosive environment. stainless steel using symbols
Co GB/T 3280 provisions 022Cr19Ni13Mo3.
When the sliding panel diagonal length is less than 1500mm, thickness not less than 2mm, when the sliding panel diagonal length greater than or
Equal to 1500mm, thickness not less than 3mm.
6.4, the material requirements under webs
Upper and lower webs using Q235 or Q345 steel plate, thickness not less than 25mm, the strength of the design values see GB 20688.3-
2006.
6.5 slide bearing performance requirements
6.5.1 skateboard bearing mechanical properties test requirements
Slide bearings and mechanical properties of the corresponding test methods shall be in accordance with Table 3.
Table 3 Mechanical Properties of slide bearings
No. Performance Test Project test requirements apply Article No.
1 compression performance vertical compressive stiffness vertical compressive stiffness Kv, tolerance is ± 30% 7.3.1
Shear Performance
Initial stiffness K1 tolerance of ± 15%
Dynamic friction coefficient
Low friction slide bearings. tolerance of ± 50%
The high friction slide bearings. allowable deviation
± 30%
7.3.2
Table 3 (Continued)
No. Performance Test Project test requirements apply Article No.
Shear Performance Correlation
Stress-related stress σ0 benchmarks designed to take stress 7.3.3.1
Correlation between the reference loading speed loading speed should take 0.4m/s 7.3.3.2
Repeated loads relevance
Repeated reference loads take the 3rd, 50th friction
Coefficient change rate should not exceed 30%
7.3.3.3
Temperature dependence of the reference temperature of 23 ℃ 7.3.3.4
8 compression performance correlation between stress-related
Vertical compressive stiffness regularity, vertical slide bearings
To maintain the stability
7.3.4
Extreme Performance
Extreme Performance Level
Vertical ultimate compressive properties
1. The slide bearing rubber bearing unit in the design surface pressure,
Before horizontal displacement reaches the maximum design displacement should not be
Appear damaged, buckling and roll; the other slide bearing
Should not be part of the destruction;
2. The slide bearing ultimate compressive strength of not less than
60MPa
7.3.5
Durability
Aging properties of the initial stiffness K1 should not exceed 30%
Creep performance in 60 years, Xu variable should not exceed 10%
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