鋼管混凝土框架結(jié)構(gòu)抗震性能的非線性有限元分析*
丁陽(yáng)1 許成祥12 戴學(xué)新1 李忠獻(xiàn)1
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(1天津大學(xué)建筑工程學(xué)院 300072；2江漢石油學(xué)院土建系荊州 434023）
［提要］ 基于一榀兩跨3層鋼管混凝土框架的抗震性能模型試驗(yàn)，建立了基于鋼管混凝土統(tǒng)一模量理論的鋼管混凝土以及考慮鋼管約束效應(yīng)的核心混凝土的本構(gòu)方程。分別按照鋼管混凝土的統(tǒng)一模量理論和分離模量理論，采用ANSYS參數(shù)化程序設(shè)計(jì)語(yǔ)言（APDL）編制了命令流，對(duì)模型框架在低周反復(fù)荷載作用下的抗震性能進(jìn)行了非線性有限元分析。計(jì)算結(jié)果與模型試驗(yàn)結(jié)果吻合較好，驗(yàn)證了基于統(tǒng)一模量理論的鋼管混凝土框架結(jié)構(gòu)全過(guò)程分析方法的可行性，以及所編制的APDL命令流程序?qū)︿摴芑炷量蚣芙Y(jié)構(gòu)抗震計(jì)算的有效性，為鋼管混凝土框架結(jié)構(gòu)的抗震設(shè)計(jì)提供了實(shí)用的計(jì)算軟件。［關(guān)鍵詞］ 鋼管混凝土;框架結(jié)構(gòu);抗震性能;非線性有限元分析;統(tǒng)一模量;分離模量Abstract: Based on the model experiment on seismic behavior of a 2-span，3-story concrete filled steel tubular(CFST)frame under lateral cyclic loads，the constitutive equations of the CFST in terms of the uniform modulus theory and the constitutive equations of the core concrete considering the restraint effect of steel tube are built．A command stream is edited with the ANSYS Parametric Design Language(APDI)，and the nonlinear finite element analysis on the seismic behavior of the model frame under lateral cyclic loads is completed．The calculated results are much coincided with the tested results，which further proves the rationality of the design method of the CFST frames，based on the uniform modulus theory of CFST，and the effectiveness of the computer program of APDI．Command stream for seismic calculation of CFST frames，and provides a practical software for seismic design of CFST frames．Keywords：Concrete-filled steel tubular (CFST) frame; seismic behavior; nonlinear finite element analysis; uniform modulus; separated modulus
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