ELASTIC MODULUS REDUCTION METHOD FOR LIMIT LOAD EVALUATION OF FRAME STRUCTURES

查看全文 作　　者：Lufeng Yang Bo Yu Yongping [1,2]Qiao

机构地区：[1]Key Laboratory of Disaster Prevention and Structural Safety, Ministry of Education;[2] School of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China;

出　　处：《Acta Mechanica Solida Sinica》索引2009年第22卷第2期,共7页

基　　金：supported by the National Natural Science Foundation of China (No. 50768001);the Foundation of New Century Excellent Talents in University (No. NCET-04-0834);the Guangxi Natural Science Foundation (No. 0728026) 摘　　要：A new strategy for elastic modulus adjustment is proposed based on the element bearing ratio (EBR),and the elastic modulus reduction method (EMRM) is proposed for limit load evaluation of frame structures. The EBR is defined employing the generalized yield criterion,and the reference EBR is determined by introducing the extrema and the degree of uniformity of EBR in the structure. The elastic modulus in the element with an EBR greater than the reference one is reduced based on the linear elastic finite element analysis and the equilibrium of strain energy. The lower-bound of limit-loads of frame structures are analyzed and the numerical example demonstrates the flexibility,accuracy and effciency of the proposed method. 关键词：弹性模量框架结构极限载荷还原法评价广义屈服准则 EBR 有限元分析

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ELASTIC MODULUS REDUCTION METHOD FOR LIMIT LOAD EVALUATION OF FRAME STRUCTURES

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