半刚性节点钢框架系统的强度可靠性分析

基金项目:

国家自然科学基金(50378007)

详细信息

Analysis of Strength Reliability of Semi-rigid Steel Frame

College of Architecture and Civil EngineeringBeijing University of Technology, Beijing 100124, China

摘要: 为了更为准确地评估钢框架系统可靠性,将实际的半刚性连接节点视为转动弹簧单元,推导了半刚性梁元节点失效的减缩刚度矩阵和等效节点力公式.采用分枝限界法研究了半刚接框架的系统强度可靠性,并与刚接和铰接结构进行了对比.算例表明,含有半刚性节点的主要失效路径和失效概率发生了较大变化,其系统可靠性介于刚接与铰接结构之间,节点刚度对钢框架系统可靠性的影响较大.
- 半刚性节点 /
- 钢框架 /
- 强度可靠性 /
- 分枝限界
Abstract: To evaluate more exact system reliability of steel frame,taking the actual semi-rigid joint as a rotational spring element,formulae of the reduced stiffness matrix and the equivalent nodal force of beam element with semi-rigid joints are deduced.The method of branch boundary is adopted.The strength reliability of the semi-rigid steel frame system is studied and compared with that of fully-rigid and pined connections.The example indicates that there are real differences in the main failure path,its failure probability and system reliability between the semi-rigid connections and the fully-rigid or pinned connections and that the effects of joint stiffness on the strength reliability of steel frame are important.
- semi-rigid joints /
- steel frame /
- strength reliability /
- branch boundary

[1]	CHEN W F.Steel beam-to-column building connections[M].New York:Elsevier Science Publish Co Inc,1988:1-3.
[2]	SEKULOVIC M,SALATIC R.Nonlinear analysis of frames with flexible connections[J].Computers and Structures,2001,79(11):1097-1107.
[3]	郭兵,陈爱国.半刚接钢框架的有限元分析及性能探讨[J].建筑结构学报,2001,22(5):48-52.GUO Bing,CHENAi-guo.Finite element analysis and behavior of semi-rigid steel frames[J].Journal of Building Structures,2001,22(5):48-52.(in Chinese)
[4]	American Institute of Steel Construction.Load and resistance factor design specification for structural steel buildings(LRFD)[S].Illinois:AISC,1999.
[5]	中华人民共和国建设部.GB50017—2003钢结构设计规范[S].北京:中国计划出版社,2003.
[6]	LEE S,MOON T.Moment-rotation model of semi-rigid connections with angles[J].Engineering Structures,2002,24(2):227-237.
[7]	LI T Q,CHOO B S,Nethercot D A.Connection element method for the analysis of semi-rigid frames[J].Journal of Constructional Steel Research,1995,32(2):143-171.
[8]	龙驭球,包世华.结构力学(下册)[M].北京:高等教育出版社,1996:74-117.
[9]	PARK S,CHOI S.Efficient method for calculation of system reliability of a complex structure[J].International Journal of Solids and Structures,2004,41:5035-5050.
[10]	毕继红,王晖.工程弹塑性力学[M].天津:天津大学出版社,2003:37-58.
[11]	李继华.建筑结构概率极限状态设计[M].北京:中国建筑工业出版社,1990:151-166.