【摘要】 索杆张力结构是以拉索和压杆为基本单元构成的自平衡体系,并通过预应力提供结构刚度的一类新型空间结构。通过修正的拉格朗日方程推导了索杆张力结构的增量运动方程,且采用Ne-wmark常平均加速度法求解方程,在每个时间步内应用了修正的牛顿拉斐逊法。应用此方法对索杆张力柱面网壳的自振特性及其在地震作用下的非线性动力响应进行了数值模拟分析。更多还原

【Abstract】 Cable-strut tensile structure is a new spatial structural system.The structural elements are composed of strut(compression) and cable(tension) to achieve a "self-stressed equilibrium" state and to be stiffened by the introduction of prestress.The incremental equation of motion is written with respect to the system’s configuration using an updated Lagrangian equation and integrated in time by Newmark constant-average acceleration method.A modified Newton-Raphson iterative scheme is then adopted to insure the equilibrium within each time step.This procedure is used for the study of the non-linear dynamic response of cable-strut tensile barrel vault shell to earthquake.更多还原