摘要
恢复力模型是根据大量从试验中获得的恢复力与变形的关系曲线经适当抽象和简化而得到的实用数学模型,对钢筋混凝土结构抗震性能和计算机模拟有十分重要的意义。本文基于理论公式及短肢剪力墙低周反复试验数据,建立了往复荷载作用下构件的四折线型恢复力模型,并给出了滞回模型,恢复力模型与试验结果较为吻合。此外,针对恢复力模型中的折点刚度突变问题,推导出利用拟静力法求解结构动力反应时折线型恢复力模型中的加载点和卸载点这两类折点的计算公式。计算中避免迭代,结果较准确且便于计算机编程及实际应用。
The restoring force model is accessed to lots of experimental researches,and it is just a practical mathematical model that presents the relationship between the load and displacement through an appropriate abstraction and simplification. Based upon the theoretic formulas and testing data,the four-linear restoring model under low cyclic load that is in good agreement with the experiment is established and the hysteresis model is proposed. Moreover,aimed at the stiffness turning point of restoring force model,a formula using pseudo-static method to solve the problems of nonlinear dynamic equations is devised. Iteration calculation is avoided in calculation,and it is convenient for computer programming with a more accurate result.
出处
《地震工程与工程振动》
CSCD
北大核心
2014年第5期100-107,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(10572107)
关键词
短肢剪力墙
恢复力模型
骨架曲线
滞回规则
折点
short-pier shear wall
restoring force model
skeleton curve
hysteretic rule
stiffness turning point
