【摘要】 基于LS-DYNA有限元程序采用中心差分法二次开发的半主动控制平台,实现高层建筑结构基于MR阻尼器的非线性地震损伤控制系统与结构一体化的建模、分析与设计。以一15层的钢框架-钢板剪力墙结构为例,数值分析控制前后结构的动力响应和损伤发展过程。结果表明:所开发的半主动控制平台计算稳定、速度快、精度高;采用MR阻尼器控制后的结构层间位移、残余变形和损伤指数等都明显减小,结构损伤分布范围更广,结构整体抗震性能明显提高。更多还原

【Abstract】 A nonlinear seismic damage control strategy of tall building structures using MR dampers is proposed.The basic control equation based on central difference method is derived,the semi-active control platform is developed through the secondary development of LS-DYNA program,and the structure and the nonlinear semi-active control system integrated modeling,analysis and design are realized.Taking a 15-story steel frame-steel plate shear wall(SPSW) structure as example,the dynamic responses and damage process of the structures with and without MR dampers are analyzed,results indicate that the control platform is numerically stable with fast solution speed and high precise.The relative displacement,residual displacement and damage of each story are all significantly reduced,the damage distribution is more extender,and the global seismic performance is increased after MR damper is employed.更多还原