PROGRESSIVE COLLAPSES SIMULATION AND IMPORTANCE ASSESSMENT OF STONE ARCH BRIDGE
With the increasing accidents of structures caused by human errors,terrorist attacks or nature disasters in recent years,disaster-prevention and hazardmitigation for structures have aroused the concern of engineers,especially the safety of infrastructures. Based on a traditional 3-span stone arch bridge,this paper establishes a 3-D finite element (FE) model of the stone arch bridge with the general-purpose finite element program-MSC.MARC. The process of the collapse is simulated with the contact algorithm and the deactivation of elements,and the possible reasons of the collapse are analyzed. Furthermore,the importance of different components of the stone arch bridge is indexed with the conception of the generalized structural stiffness,so as to identify the most critical regions of the stone arch bridge. The predicted critical regions are verified to be correct and reasonable via limit analysis,which provides references for the design,construction and maintenance of arch bridges.
Stone arch bridge Progressive collapse Computer simulation Deactivation element Critical region
Xiao Lu Xin-Zheng Lu Lie-Ping Ye Xu-Chuan Lin
Department of Civil Engineering,Tsinghua University,Beijing 100084,P.R. China Department of Civil Engineering,Tsinghua University,Beijing 100084,P.R.China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1549-1554
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）