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为研究不同预留滑移量下隔震结构的地震反应规律,以软钢实体圆锥棒作为限位消能装置,运用Stateflow逻辑框图模拟隔震层的运动状态,采用Bouc-Wen模型描述弹塑性杆件限位器的滞回特性,建立了摩擦滑移隔震框架结构的MATLAB/Simulink仿真模型,对隔震结构的动力反应和能量反应进行分析,并将纯摩擦动力反应的仿真值与振动台试验结果进行对比.结果表明:纯摩擦动力反应仿真值与试验值基本吻合;随着预留滑移量的增大,上部结构的加速度反应并没有明显增加,但隔震层的滑移量增加,限位器的变形减小;滑移隔震结构的阻尼耗能与预留滑移量关系不大,滑移量的变化主要改变了隔震结构体系的地震输入能量,而对其他能量指标影响较小.
In order to study the seismic response law of isolated structures with different reserved slip, a soft cone of solid steel was used as the limit energy dissipation device. Stateflow logic diagram was used to simulate the motion of the isolation layer. The Bouc-Wen model was used to describe the elasto-plasticity The hysteretic characteristics of the rod stopper are established. The MATLAB / Simulink simulation model of the friction-slip isolated frame structure is established, and the dynamic response and energy response of the isolated structure are analyzed. The simulation results of the pure friction dynamic response and the vibration The results show that the simulation results of the pure frictional dynamic response are in good agreement with the experimental ones. With the increase of the reserved slip, the acceleration response of the superstructure does not increase obviously, but the slip of the isolation layer And the deformation of the stopper decreases. The damping energy dissipation of slip-isolation structure has little to do with the residual slip, and the change of slippage mainly changes the input energy of seismic isolation system, while the other energy Indicator less affected.