高層建筑鋼-混凝土混合結(jié)構(gòu)分區(qū)耦合分析模型及開裂層位移參數(shù)分析
李國強 丁 翔 鄭敬有 周向明
- 摘 要
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李國強 （同濟大學(xué) 上海 200092）丁 翔 鄭敬有 （中國船舶工業(yè)第九設(shè)計研究院 上海 200063）周向明 （香港科技大學(xué)）
[提要] 為尋求一個準確、便捷地對鋼框架-混凝土核心筒混合結(jié)構(gòu)彈塑性分析的可靠方法，將其分離為鋼筋混凝土和鋼結(jié)構(gòu)，分別研究其材料或構(gòu)件的本構(gòu)關(guān)系及滯回模型、破壞準則，然后針對混合結(jié)構(gòu)彈塑性狀態(tài)不同的區(qū)域和構(gòu)件分別應(yīng)用梁元、墻元、有限條三維分區(qū)耦合進行求解，來完成整個混合結(jié)構(gòu)的彈塑性靜動力分析。對混合結(jié)構(gòu)在典型地震荷載和風荷載作用下的層間位移參數(shù)分析結(jié)果表明，層間剪切變形比層間彎曲變形對剪力墻開裂影響要大。
[關(guān)鍵詞] 混合結(jié)構(gòu) 分區(qū)耦合法 層間位移 參數(shù)分析 滯回模型 彈塑性分析
An efficient and accurate approach for analyzing the elasto-plastic seismic response of steel frames and concrete coretube hybrid structure( SFCTHS)is explored through experimental study and theoretical analysis. Elasto-plastic finite wall elements with smeared cracks and elasto-plastic finite strips are employed for the analysis of the different zones of the shear walls according to the stress distribution. Elasto-plastic hinge model is used to solve elasto-plastic behavior of steel beam. Through calculating structure examples, the cracking characteristics of shear walls and the weak aspects of the hybrid structure under earthquakes and winds are revealed. Furthermore, the parameter study on storey drifts of SFCTHS shows that it is not appropriate that the storey drift limits given by the code do not consider the effects of shear deformation.
Keywords: steel-concrete hybrid structure; zone-based coupling method; parameter study; storey drifts; hysteresis model; elasto-plastic analysis
