摘要
结构发生连续倒塌将会导致严重的生命和财产损失,造成重大的社会影响,因而日益受到工程设计人员的关注。欧美等国已相继制定了连续倒塌相关的设计规范并提出了相应的设计分析方法,但还不够完善。对现有的结构连续倒塌相关的规范设计及分析方法进行总结和归纳,并指出其中存在的一些问题。提出了在进行多重荷载路径法分析时应通过结构自重的施工模拟来考虑结构初始态的重大影响,以及运用结构动力学理论推导出结构在不同构件失效时间下的动力响应,建议在进行多重荷载动力分析时应考虑不同构件失效时间的影响。最后对动力弹塑性时程分析方法在结构抗连续倒塌设计分析中的应用进行了初步的探讨,阐述了动力弹塑性时程分析的基本方法及其优点和缺点。
The progressive collapse of structures usually results in serious life and property loss,thus more research efforts are directed to this issue.North America and Europe had developed progressive collapse relevant design codes and proposed corresponding design analysis methods.In this paper,these design codes and analysis methods were summarized,and some existing problems were pointed out.It is suggested that the multiple load path method considers the influence of the structural initial state through simulating construction process under structure′s self-weight.And the structural dynamic response is discussed with different member failures,which should be considered in the multiple load path dynamic analysis.Finally this paper discusses how the dynamic elastic-plastic time history analysis approach can be applied to the structural design to prevent progressive collapse,and the advantage and disadvantage are listed.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2009年第S1期195-199,共5页
Journal of Building Structures
关键词
连续倒塌
多重荷载路径法
结构初始态
动力响应
动力弹塑性时程分析
progressive collapse
multiple load path method
structural initial state
dynamic response
dynamic elastic-plastic time history analysis
