GBJ 9-1987 Code for Loads on Building Structures GBJ9-87 GBJ9-1987 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for Loads on Building Structures
1988 Beijing
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for Loads on Building Structures
GBJ9—87
Editor Department: Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approval Department: State Planning Commission Effective Date: July 1, 1988
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of "Code for Loads on Building Structures" Planning Standards [1987] No. 2337
According to the requirements of the former State Construction Commission (81) Jianfa Shezi No. 546, the Ministry of Urban and Rural Construction and Environmental Protection, together with relevant departments, revised the original "Code for Loads on Industrial and Civil Building Structures" TJ9-74, and the relevant departments reviewed it. The revised "Code for Loads on Building Structures" GBJ9-87 is now approved as a national standard and will be implemented on July 1, 1988.
This code is managed by the Ministry of Urban and Rural Construction and Environmental Protection. Its specific interpretation and other work are the responsibility of the China Academy of Building Research of the Ministry of Urban and Rural Construction and Environmental Protection. The publication and distribution of this code is the responsibility of China Planning Press. State Planning Commission
December 11, 1987
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Revision Notes
This code is edited by our department in accordance with the Notice No. 546 of the former National Capital Construction Commission (81) Jianfashezi, and is specifically revised by the China Academy of Building Research in conjunction with relevant units from the "Industrial and Civil Building Structure Load Code" (TJ9-74) approved by the National Capital Construction Commission in 1974. Since the trial implementation of the original code, the code management group has organized relevant units to carry out a large number of experimental research and survey and measurement work in accordance with the plan requirements. In addition, the code revision group has also summarized the domestic engineering practice experience in recent years, learned from foreign experience, and referred to international standards. On this basis, a revised draft of the code was proposed. After widely soliciting opinions from relevant units across the country, it was discussed and revised several times and finally reviewed and finalized by our department in conjunction with relevant departments. This code is divided into six chapters and six appendices. The main contents of this revision are: according to the principles stipulated in the "Uniform Standard for Design of Building Structures" (GBJ68-84), the value standards of standard load values ​​are unified; the load effect combination method is improved; load partial coefficients are added, the standard values ​​of live loads for shops and bookstores are adjusted, and the reduction coefficients of live loads on floors of multi-story civil buildings are modified; the value of standard values ​​of live loads on floors of industrial buildings are adjusted, and the value of live loads on non-walkable roofs of factories is modified; the value of lateral horizontal loads of cranes is modified, and clauses for the combination of multiple cranes are added, and the values ​​of basic snow pressure and basic wind pressure across the country are revised: the snow distribution coefficient for most roofs takes into account both uniform distribution and uneven distribution; the distribution coefficient for uneven snow distribution on double-slope roofs is added; the wind vibration calculation method of the structure is modified, and the symbols and units are modified in accordance with the provisions of the "General Symbols, Units of Measurement and Basic Terminology of Building Structures" (GBJ83-85).
The implementation of this code must be used in conjunction with the national standards and specifications for building structure design compiled according to the Unified Standard for Building Structure Design GBJ68-84, and must not be mixed with the national standards and specifications for building structure design not compiled according to GBJ68-84. Engineering Construction Standard Full-text Information System
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Engineering Construction Standard Full-text Information Systembzxz.net
In order to continuously improve the quality of the code, all relevant units are requested to pay attention to summarizing experience and accumulating information in the process of implementing this code, and feedback any problems and opinions found to the management unit of this code, China Academy of Building Research (Beijing Xiaohuangzhuang), at any time for reference in further revisions in the future.
Ministry of Urban and Rural Construction and Environmental Protection
October 1987
Engineering 2 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Main Symbols
G—Standard value of permanent load (constant load); Q—Standard value of variable load (live load); -Load effect coefficient;
Design value of load effect combination;
-Design value of load short-term effect combination;
S1—Design value of load long-term effect combination,-Basic natural vibration period of structure;
—Standard value of snow load;
Basic snow Pressure;
-standard value of wind load;
-basic wind pressure;
wind vibration coefficient;
permanent load partial coefficient;
variable load partial coefficient;
structural importance coefficient;
roof snow distribution coefficient;
wind pressure height variation coefficient;
wind load shape coefficient;
-pulsation influence coefficient;
-pulsation amplification coefficient;
mode coefficient, internal friction angle;
load combination coefficient;
load combination value coefficient;
load quasi-permanent value coefficient.
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 1
Chapter 2
Section 1
Section 2
Chapter 3
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 1
Section 2
Section 3
Section 4
Appendix 1
Appendix 2
Load classification and load effect combination
Load classification and representative values ​​of loads
Load effect combination·
Floor and roof live loads
Uniformly distributed live loads on floors of civil buildings
Live loads on floors of industrial buildings
Uniformly distributed live loads on roofs·
Roof dust loads
Construction and maintenance loads and horizontal loads on railingsDynamic coefficients
Crane loads
Vertical and horizontal loads of cranes
Combination of multiple cranes
Dynamic coefficients of crane loads and quasi-permanent loads Value coefficient snow load…
Standard value of snow load and basic snow pressure
Snow distribution coefficient of roof area
Wind load
Standard value of wind load and basic wind pressure·
Wind pressure height variation coefficient
Wind load shape coefficient
Wind vibration coefficient
Self-weight of common materials and components
Determination method of equivalent uniformly distributed live load on floor Engineering Construction Standard Full-text Information System
（13)
（13)
（39)
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Engineering Construction Standard Full-text Information System
Appendix Appendix 3
Appendix 4
Appendix 5
Appendix 6
Industrial building floor live load
Calculation formula for basic natural vibration period of structure
(for wind vibration calculation)……
Conversion table of commonly used non-legal measurement units and legal measurement units
Explanation of terms used in this code
Additional explanation
Engineering construction standard full text information system
Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This code is specially formulated to meet the needs of building structure design and meet the requirements of safety, practicality, economy and rationality. Article 1.0.2 This code applies to the structural design of industrial and civil houses and general structures.
This code is formulated in accordance with the principles stipulated in Article 1.0.3 of the "Uniform Standard for Building Structure Design"
GBJ68-84.
Article 1.0.4 The actions involved in the design of building structures include direct actions (loads) and indirect actions (such as actions caused by foundation deformation, concrete shrinkage, welding deformation, temperature changes or earthquakes). This code only stipulates loads. Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 2 Load Classification and Load Effect Combination Section 1 Load Classification and Load Representative Values
Article 2.1.1. The loads on the structure can be divided into the following three categories: 1. Permanent load (constant load): during the use of the structure, its value does not change with time, or its change is negligible compared to the average value. For example, the dead weight of the structure, soil pressure, etc.
Note: Dead weight refers to the load (gravity) generated by the weight of the material itself. 2. Variable load (live load): during the use of the structure, its value changes with time, and its change value cannot be ignored compared to the average value. For example, floor live load, roof live load and dust load, crane load, wind load, snow load, etc. 3. Accidental load: load that does not necessarily appear during the use of the structure, but once it appears, its value is large and the duration is short. For example, explosion force, impact force, etc. Article 2.1.2 When designing building structures, different representative values ​​shall be adopted for different loads:
For permanent loads, standard values ​​shall be adopted as representative values; for variable loads, standard values, combined values ​​or quasi-permanent values ​​shall be adopted as representative values ​​according to design requirements;
For accidental loads, their representative values ​​shall be determined based on test data and engineering experience. Article 2.1.3 When designing building structures, standard values ​​shall be adopted as basic representative values ​​of loads.
Standard values ​​of permanent loads: For the deadweight of the structure, it can be determined by calculating the deadweight per unit volume of the designed dimensions of the structural components and the material; for commonly used materials and components, their deadweight can be adopted in accordance with Appendix 1 of this Code; for some materials and components with large deadweight variations (such as insulation materials made on site, concrete thin-walled components, etc.), the standard value of the deadweight shall be based on the unfavorable state of the structure, and the upper or lower limit shall be taken. The standard value of variable load shall be adopted in accordance with the provisions of each chapter of this code. Article 2.1.4 When a structure is subjected to two or more variable loads, the design of the ultimate limit state of bearing capacity or the normal use limit state is designed according to the combination of short-term effects, and the combination value shall be used as the representative value of the variable load. The combination value of variable load shall be the standard value of variable load multiplied by the load combination coefficient. Article 2.1.5 When the normal use limit state is designed according to the combination of long-term effects, the quasi-permanent value shall be used as the representative value of variable load. The quasi-permanent value of variable load shall be the standard value of variable load multiplied by the quasi-permanent value coefficient of load.
Section 2 Load Effect Combination
Article 2.2.1 The design of building structures shall be based on the loads that may appear simultaneously on the structure during use, and the load effects shall be combined according to the ultimate limit state of bearing capacity and the normal use limit state, and the most unfavorable combination of each shall be taken for design. Article 2.2.2 For the ultimate limit state of bearing capacity, the basic combination and accidental combination of load effects shall be used for design, and the following design expression shall be adopted: PoS
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