Preface According to the requrements of Document JB[1997]No.108-the Ministry of Construction,the fomer code was revised by the China Academy of Building Research together with the relevant institu tons of higher leaming and scientific research,design,enterprises ete. htheperiodcdrevision,thecodeievisiongouplaunehodvaniotusstudisonspeifctopics,car idouwide-ranging investigativensid practical domesticxfor design of concrete structures,coordinating with relevant standards and made necessary companson with advanced intemational standards the basis of ways wereusd by the code revision group to solicit comments from the onizationscocemed in the county,in addi- tion,ome trial designs were by the revision group,in the meantime,the major issus in the cde were elaborated and amended revised repeatedly,and finally,the newverson of code was decid- ed after examnation. crete structures,Materials,Structural analyses,Calculations of ulimate limit states and checking cal- members and Relevant appendixes. The main stipulation of the present code may be,if necded,revised in the future,the concemed information and contents of local revised clauses will be published on the Magazine of Engineering Construction Standardization. In order to enhance the quality of the code,all relevant units are kindly requested to sum up and accumulate their expenences from actual practices during the process of implementing the code,and the relevant opinions and suggestions should be sent to the Managing Group of Code for Design of Con- crete Suructures,China Academy of Building Research,No.30,Bei San Huan Dong Lu,Beijing, China(Postcode:100013;E-mail:code_ibs_cabr@63.net.cn). Chief Editorial Unit:the China Academy of Building Research Participating Units:Tsinghua University,Tianjin University.Chongqing Construction Engineering College,Hunan University,Dongnan University,.Hehai University,Dalian University of Science and Technology,Habin University of Architecture,Xi'an University of Architectura Technology,Building Design Institute of the Ministryof Construction,Beijing Municipal Building Design Institute,Beijing Capital Engineering Co.,Ld,China National Beijing Contracting&Engineering Institute for Light In- dustry,Professiona Design Institte of the Railway Ministry,Planning and Design Institute of Water Transport,Ministry of Communication,Northwest China Hydroelectric Design and Survey Institute,and Chief Drafting Stafs: Li Mingshun Xu Youlin