防灾减灾工程学报2024，Vol.44Issue(3)：632-639,8.DOI:10.13409/j.cnki.jdpme.20221226003
基于AP法的单层球面网壳结构地震倒塌破坏分析
Seismic Collapse Analysis of Single-Layer Reticulated Spherical Shell Structure Based on AP Method
摘要
Abstract
Under seismic action,the weak components of a structure are highly likely to experience ini-tial failures,leading to collapse in subsequent earthquakes.To study the progressive collapse resis-tance of single-layer reticulated spherical shell structures under initial member failure,the Incremental Dynamic Analysis(IDA)method was employed to analyze distribution of weak areas in the structures and their dynamic response.Maximum response parameters(stress,plastic strain,equivalent plastic strain,etc.)were introduced to identify initial failure members.The Alternate Path(AP)method was then used to analyze the dynamic response of the remaining structure under subsequent seismic ac-tions.The results showed that the seismic weak areas of single-layer shell structures were primarily lo-cated at the base and were significantly affected by seismic forces.Under seismic loads,the initial fail-ure of members in weak areas led to a sharp increase in structural response parameters such as maxi-mum vertical displacement of nodes,plastic member ratio,and total strain energy,accelerating struc-tural collapse.Due to the initial failure of members,significant plastic deformation occurred at both ends of the members,with evident plastic development in surrounding members.Attention should be paid to members in seismic weak areas,as initial failure in these areas will have a substantial impact on the overall structural integrity.关键词
单层网壳结构/增量动力分析/备用荷载路径法/初始失效/连续性倒塌Key words
single-layer reticulated shell/incremental dynamic analysis/alternative path method/prima-ry failure/progressive collapse分类
建筑与水利引用本文复制引用
吴文青,朱南海..基于AP法的单层球面网壳结构地震倒塌破坏分析[J].防灾减灾工程学报,2024,44(3):632-639,8.基金项目
国家自然科学基金项目(51768024)资助 （51768024）
