【摘要】 利用电液伺服压剪试验机对钢铅组合耗能器(CSLD)进行拟静力试验,研究其力学性能;利用一个1∶4缩尺单层钢框架结构模型对CSLD进行地震模拟振动台试验,研究其耗能减震效果;试验结果表明:结构的层间位移和加速度反应明显减小,CSLD的滞回曲线饱满,确实能够很好地控制结构的地震反应。提出评价耗能器性能优劣的准则及两个附加条件,并利用遗传算法对CSLD的6个几何参数进行优选,结果表明优选效果良好,有利于耗能器的定型化和系列化。最后,利用ANSYS对安装有CSLD的20层钢结构Benchmark模型进行地震反应分析,分析结果表明CSLD对多高层结构同样具有良好的减震控制效果。更多还原

【Abstract】 Pseudo-static tests of the combined steel lead damper (CSLD) were carried out for the study of mechanical properties of CSLD, using electro-hydraulic servo press-shear machine. Shaking table tests of a 1:4 scale one-story steel structure model with CSLD were conducted for the study of cushioning effect of CSLD. Test results indicate that the structure’s inter-story displacement and acceleration responses are significantly reduced by the introduction of CSLD, which has full hysteresis loop and can control the structure’s seismic responses. The criterion to evaluate the performance of the damper and two additional conditions were put forward and Genetic algorithm was used to optimize the six geometric parameters of CSLD according to the criterion. Optimization results demonstrate that Genetic algorithm can facilitate the standardization of CSLD. Finally, seismic response analyses of a benchmark model of 20-story steel structure fixed with CSLD were carried out. Results of analyses indicate that CSLD has favorable vibration control effect on multi-story structure.更多还原