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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。
In this paper, based on the theory of unit structure of membrane with rotating DOF and common plate of thickness and thickness created by the research team of Long Yuqiu, a new bivic finite element method Analysis of monolithic shell model. In the integral shell-element model, the in-plane stiffness of shear wall panels is simulated by reinforced concrete membrane element, the out-plane stiffness of the shear wall panels is simulated by the universal thick and thin plate element, and the fiber beam element is used to simulate the in- Edge member. In order to validate the model, the numerical results of the model are compared with the experimental results of RC shear wall specimens. The results show that the monolithic shell model can predict the ultimate bearing capacity, nonlinear bending and shear coupling deformation of reinforced concrete shear walls under the combined action of bending, shear and compression. The shell element model has the advantages of less degree of freedom, high unit calculation precision, fast convergence rate and small total calculation, which is suitable for the reinforced concrete shear wall element model of nonlinear dynamic response analysis of high-rise buildings under earthquake.