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该文通过LS-DYNA程序二次开发了磁流变(MR)阻尼器的Bouc-Wen动力滞回模型、半主动控制律和钢材的弹塑性损伤本构模型,进而实现应用通用有限元程序精细化模拟受控结构损伤发展过程的目的。基于损伤本构模型,提出结构构件和结构层的抗震性能指标,并应用该指标对结构各层阻尼器的最大出力进行优化设计。对一9层Benchmark钢框架结构进行损伤控制研究,采用IDA方法对控制前后结构的抗震性能进行分析,结果表明:MR阻尼器优化设计后受控结构的损伤累积效应较无控结构明显减小,损伤分布范围更广,塑性耗能能力和抗震能力都得到显著提高。
In this paper, the Bouc-Wen dynamic hysteresis model, the semi-active control law and the elasto-plastic damage constitutive model of MR damper are redeveloped by LS-DYNA program to realize the application of general finite element program To simulate the controlled structural damage development process. Based on the damage constitutive model, the seismic performance indexes of structural members and structural layers are proposed, and the optimal design of the maximum output of dampers at each layer of the structure is given by using this indicator. The damage control of a 9-story Benchmark steel frame structure is studied, and the seismic performance of the structure before and after the control is analyzed by IDA method. The results show that the damage cumulative effect of the controlled structure after MR damper design is significantly reduced compared with that without control structure, Broader distribution of damage, plastic energy dissipation capacity and seismic capacity have been significantly improved.