论文部分内容阅读
对钢筋混凝土剪力墙构件层次的滞回行为的合理模拟有着重要的应用及研究价值,但目前剪力墙在反复荷载作用下的非线性模拟仍然存在困难。Bouc-Wen模型是一种平滑模型,以解析公式描述滞回行为,在结构和机械领域有着广泛的应用。本文将剪力墙构件在往复荷载作用下的恢复力-位移关系简化为单自由度Bouc-Wen滞回模型。通过分析Bouc-Wen模型特征,给出其参数取值限制,运用遗传算法在已有试验数据基础上完成模型的参数识别。定参后的单自由度Bouc-Wen滞回模型能较好反映构件在往复荷载作用下的强度刚度退化和恢复力峰值特点,模型可作用宏观单元用于结构模型数值模拟。识别过程对类似模型的参数识别具有参考价值。
Reasonable simulation of hysteretic behavior of RC shear wall components has important applications and research value. However, the nonlinear simulation of RC shear wall under repeated load still has some difficulties. The Bouc-Wen model is a smooth model that describes the hysteretic behavior using analytical equations and has broad applications in the structural and mechanical fields. In this paper, the restoring force-displacement relationship of shear wall members under reciprocating loads is reduced to the one degree of freedom Bouc-Wen hysteresis model. By analyzing the characteristics of Bouc-Wen model, the parameter limits are given, and the genetic algorithm is used to identify the parameters of the model based on the existing experimental data. The parameterized Bouc-Wen hysteresis model after parameterization can better reflect the strength and stiffness degradation and the peak value of restoring force under reciprocating loads. The model can be used as a macro-unit for numerical simulation of structural model. The identification process has reference value for the parameter identification of similar models.