Proper interpretation of sectional analysis results  

作　　者：Juyuan Zheng Yuli Huang Zhe Qu 

机构地区：[1]Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin,150080,China [2]Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin,150080,China [3]Arup,560 Mission Street,Suite 700,San Francisco,CA,94105,United States

出　　处：《Earthquake Research Advances》2024年第2期65-71,共7页地震研究进展（英文）

基　　金：supported by the Natural Science Foundation of China(52122811).

摘　　要：Displacement control algorithms commonly used to evaluate axial force-bending moment(PM)diagrams may lead to incorrect interpretations of the strength envelopes for asymmetric sections.This paper aims to offer valuable insights by comparing existing displacement control algorithms with a newly proposed force control algorithm.The main focus is on the PM diagrams of three example sections that exhibit varying degrees of asymmetry.The comparative study indicates that conventional displacement control algorithms inevitably introduce non-zero out-of-plane bending moments.The reported PM diagram in such cases erroneously neglects the out-of-plane moment and fails to represent the strength envelope accurately.This oversight results in significant and unconservative errors when verifying the strength of asymmetric sections.

关 键 词：Fiber section model Axial force-moment interaction diagram Limit state Failure surface 

分 类 号：P315.9[天文地球—地震学]