Load Code for the Design of Building Structures 建筑结构荷载规范 GB50009-2001 (英文版) Beijing 2002
NOTICE The code is written in Chinese and English.The Chinese text shall be taken as the ruling one in the event of any inconsistency between the Chinese text and the English text
Notice of Promulgation for the National Standard"Load Code for the Design of Building Structures" Document JB [2002]No.10 According to the requirements of"Notice of Printing and Distributing for the 1997 Preparation and Revision Plan of Engineering Construction Standards'(Document B[1997]No.108)-Ministry of Construction",that the"Load Code for the Design of Building Structures"has been revised by Ministry of Construction together with the relevant departments,after a joint xamination of relevant depart- ments,hence the new code has been approved as a national standard with a serial number of GB50009-2001,and it shall come into force upon March 1,2002.Herein,clauses 1.0.5,3.1.2, 3.2.3,3.2.5,4.1.1,4.1.2,4.3.1,4.5.1,4.5.2,6.1.1,6.1.2,7.1.1and7.1.2ae mandatory clauses,which must be enforced strictly.The original"Load Code for the Design of Building Structures"GBJ987 shall be abolished after December 31,2002 The Ministry of Construction is in charge of management and explanation of the mandatory clauses in the code,the China Academy of Building Research will be responsible for the explanation of specific technicaont and the Research Institute of Standards and Noms-Ministry of Construction will organize the China Architecture Building Press to take on publishing and distributing works of this code Ministry of Construction of the People's Republic of China January 10,2002
Preface According to the requirements of Document JB[1997]No.108-Ministry of Construction,"Notice of Printing and Distributing for the1997 Preparation and Revision Plan of Engineering Construction Standards'"that the"Load Code for the Design of Building Structures"GB]987,which was ap- proved by 1987 the State Capital Construction Commission of the Peoples Republic of China,has been revised by the China Academy of Building Research together with the relevant units. In the period of revision,the code revision group carried out various studies on specific topics, smmarized the recent domestic design experience and referred to the concemed contents of aboad codes and intemational standards,meanwhile,the various ways were used by the code revision group tosolicit widespread relevant units,the code was bom out through repeated revisions and finally,the new version of code was decided after examination. The cde includes7 chapters and 7 appendices,the main revised neinpresent codereas follows: 1.Based on the revised combination rule in the revised edition of "Unified Standard for Reliability Design of Building Structures"and cast away the od ideasfor"combination of wind od" the combinations,which are controlled by the permanent load effects,have been added into the funda- mental combinations of loads;in the serviceability limit states design,two types of combinations in- cluding the characteristic combination and the frequent combination are given in the combinations of short term effects,in the mean time,the coefficients for frequent values for variable loads are in- creased;the respective coefficients of combinations values are given in the all combination values of variable loads. 2.Partial adjusted and supplemented to live loads 3.For uniform live loads on roofs,the live load on unmanned roof is adjusted and the stipulations for the loads of roof garden,helicopter parking apron are added 4.The character of service for crane is changed to the working grade of crane 5.Wind pressure and snow pressure have been considered anew respectively by their statistical data,according to the new from ntion-wide observatory,mean- whil,the mean recurrence interval for the reference values of wind load,snow load have been changed from a30-year mean recurence interval to a50-year mean recurrence interal;the values of ow pressure and wind pressure from the main meteorological stations throughout the counry,during a 10-year,a50-year and a 100-year mean recurence intervals respectively are given in the appendix of the code. 6.A category of terrain roughness is added. 7.The adjustment the topographic conditions have been given to the expo sure factors of wind pressure for the buildings in mountain area. 8.A special stipulation for the wind oad on the fencing structure is given. 9.The consideration for the influences of interference with each other between buildings in a ar-
chitectural complex has been put forward. 10.The requirement for checking calculation of crosswind direction wind excitation is added for the flexible structures The present code may be in need of local revised in the future,that the concered information and contents of local revised clauses will be published on the magazine of"Engineering Construction Standardization" Clauses marked with boldface letters in the code are mandatory clauses and must be enforced strictly. In order to enhance the quality of code,all relevant units are kindly requested to sum up and ac cumulate their experiences in actual practices during the processfor implementing this coe,that the relevant opinions and advices,which may be available for reference to next revision,can be posted to the China Academy of Building Research(Postcode:100013;No.30,Bei San Huan Dong Lu,Bei- jing,China). Chief Editorial Unit:China Academy of Building Research Participating Units:Tongii University,China Architecture Design and Research Group,China In- temational Engineering Institute for Light Industry,China Institute of Building Standard Design and Research,Beijing Institute of Architectural Design and China Academy of Meteorological Sciences. Chief Drafting Staffs:Chen Jifa Hu Dexin Jin Xinyang Zhang Xiangting Gu Zicong Wei Caiang Cai Yiyan Guan Guixue Xue Heng Reviser (English edition of code): Chen Dingwai Profr,China Academy of Building ResearchOct4 Beijing,China