【摘要】 为避免精细积分法中的矩阵求逆,采用龙格-库塔法计算状态方程的非齐次项,并与指数矩阵的精细算法结合,应用在短肢剪力墙结构的弹塑性地震反应分析中。对短肢剪力墙结构,采用考虑剪力滞后的多垂直杆弹塑性分析模型,墙肢和连梁分别采用二折线骨架曲线、退化型三折线恢复力模型。通过MATLAB语言编程以及计算结果的比较,分析表明该方法的可行性和可靠性,因此,可推广应用于短肢剪力墙结构的弹塑性地震反应分析中。更多还原

【Abstract】 The purpose of this paper is to apply precise time-integration method on the elastoplastic seismic response of short-leg shear wall structure.In order to avoid the inverse matrix in precise time-integration method,Runge-Kutta integration scheme is used to calculate the non-homogeneous item of state equation on the base of analyzing a series of numerical integration methods.Then it is combined with the precise exponential matrix operation,which are applied in elastoplastic seismic response of short-leg shear wall structure.Muti-component elasoplastic model considering shear lag effect is applied on short-leg shear wall structure,and shear walls and coupling beams are adopted two-linearity skeleton curves and three-linearity model respectively.A program is developed by MATLAB and an example of T-shaped short-leg shear wall structure is analyzed on elastoplastic seismic response.Under the actions of El Centro wave and Taft wave,time history curves of displacement,velocity and acceleration are obtained,which are compared with those of Wilson-θ method and Newmark-β method.Results show the feasibility and reliability of the presented method.Therefore the method can be applied to elastoplastic seismic response of short-leg shear wall structure.更多还原