單層單跨變截面輕型門式剛架滯回性能影響參數(shù)有限元分析*
王振山1, 蘇明周2, 潘秀珍1, 馬輝1
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(1 西安理工大學土木建筑工程學院， 西安 710048； 2 西安建筑科技大學結構工程與抗震教育部重點實驗室， 西安 710055)
［摘要］基于單層單跨變截面輕型門式剛架整體擬靜力試驗研究，對影響整體結構抗震性能的因素，如翼緣寬厚比、腹板高厚比以及楔率進行有限元分析，得到了上述因素對整體結構承載力、耗能能力、初始剛度和剛度退化等的影響規(guī)律，并給出合理取值區(qū)間，為結構設計提供一定參考。同時，在有限元分析結果的基礎上，給出考慮翼緣寬厚比、腹板高厚比以及楔率影響的三線型骨架曲線關鍵參數(shù)擬合公式，為相關恢復力模型分析奠定基礎。［關鍵詞］門式剛架; 抗震性能; 參數(shù)分析; 擬合公式中圖分類號：TU391 文獻標識碼：A 文章編號：1002-848X(2015)15-0005-07
Finite element analysis on parameters influencing the hysteretic behaviors of single-strory single-bay light-weight portal frame with variable cross-sectionsWang Zhenshan1, Su Mingzhou2, Pan Xiuzhen1, Ma Hui1(1 School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China; 2 Key Laboratory of Structural and Aseismatic Engineering of Education Ministry, Xi′an University of Architecture and Technology, Xi′an 710055, China)Abstract:Based on the pseudo-static test of single-strory single-bay light-weight portal frame, finite element analyses were carried out on the parameters influencing the seismic behaviors of the overall structure of portal frame, including width-thickness ratio of flange, depth-thickness ratio of web and tapering ratio. The influence laws of above parameters on bearing capacity, energy dissipation capacity, initial stiffness and stiffness degradation of the overall structure were obtained and the reasonable value intervals about these parameters were given, providing a reference for the structural design. At the same time, on the basis of the finite element analysis results, the fitting formulas for key parameters of tri-linear skeleton model were proposed considering the impacts of width-thickness ratio of flange, depth-thickness ratio of web and tapering ratio, laying foundation for analyses of relevant restoring force models.Keywords:portal frame; seismic behavior; parameter analysis; fitting formula
* 陜西省科技廳自然科學基礎研究計劃項目（2014JW7288）,西安理工大學科技創(chuàng)新計劃項目（2013CX026）,西安理工大學博士啟動基金(118211408)。作者簡介：王振山，博士，講師，Email：wangdayuwang@126.com。
