聂 祺, 李云贵, 林春哲. 钢筋混凝土剪力墙非线性分析单元模型[J]. 工程力学, 2010, 27(11): 71-075,.
引用本文: 聂 祺, 李云贵, 林春哲. 钢筋混凝土剪力墙非线性分析单元模型[J]. 工程力学, 2010, 27(11): 71-075,.
NIE Qi, LI Yun-gui, LIN Chun-zhe. A NEW ELEMENT MODEL FOR NONLINEAR ANALYSIS OF REINFORCED CONCRETE SHEAR WALLS[J]. Engineering Mechanics, 2010, 27(11): 71-075,.
Citation: NIE Qi, LI Yun-gui, LIN Chun-zhe. A NEW ELEMENT MODEL FOR NONLINEAR ANALYSIS OF REINFORCED CONCRETE SHEAR WALLS[J]. Engineering Mechanics, 2010, 27(11): 71-075,.

钢筋混凝土剪力墙非线性分析单元模型

A NEW ELEMENT MODEL FOR NONLINEAR ANALYSIS OF REINFORCED CONCRETE SHEAR WALLS

  • 摘要: 该文基于龙驭球院士研究组创建的带旋转自由度膜元和厚薄通用板单元构造理论,结合修正压场混凝土双轴本构模型,建立了一种新型钢筋混凝土剪力墙非线性有限元分析整体式壳元模型。在整体式壳元模型中,采用钢筋混凝土膜元模拟剪力墙墙板的面内刚度,采用厚薄通用板单元模拟剪力墙墙板的面外刚度,采用纤维梁元模拟剪力墙中的边缘构件。为了验证该模型,将该模型的数值分析结果和钢筋混凝土剪力墙试件的试验结果进行对比。结果表明:整体式壳元模型能够对弯、剪、压共同作用下的钢筋混凝土剪力墙的极限承载力及非线性弯曲、剪切耦合变形进行较为准确的预测。该壳元模型自由度少、单元计算精度高、收敛速度快且总计算量小,适合作为高层建筑结构在地震作用下非线性动力响应分析的钢筋混凝土剪力墙单元模型。

     

    Abstract: Based on the biaxial constitutive model of the modified compression field theory (MCFT) for concrete, a new distributed shell element model for nonlinear analysis of reinforced concrete (RC) shear-walls is developed by the combination of the membrane element with drilling freedoms, the thin-thick plate element and the beam element. In this model, the in-plane and the out-of-plane behaviors of the reinforced concrete wall are simulated by the generalized conforming 4-node quadrilateral membrane element with drilling freedoms and locking-free thin-thick plate bending element respectively, which were both proposed by Long Yu-Qiu and his co-workers; and some fringe structural components of the wall are modeled by the fiber beam element. In order to validate the present model, some experimental data of the RC shear wall specimens are employed for comparison. Numerical results show that, the new distributed shell element model can well predict not only the ultimate load capacity of the RC shear walls simultaneously subjected to bending, shearing and compression, but also the coupled deformation caused by nonlinear bending and shearing. It is also demonstrated that the proposed model, which exhibits high accuracy and efficiency, is quite suitable for the nonlinear dynamic response analysis of the RC shear walls in high-rise buildings under earthquake loading.

     

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