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为研究铅-磁流变阻尼器对高层RC框架结构的减震效果,基于框架结构的弹塑性杆模型,采用数值模拟方法对未装和安装铅-磁流变阻尼器的高层RC框架结构(12层)进行了非线性动力分析。结果表明:在El Centro波、Taft波和人工波作用下,有控结构顶层边节点的最大水平位移比未控结构分别减小47.9%、40.8%和40.8%,有控结构顶层边节点的最大水平加速度与未控结构相差不大;与未控结构相比,铅-磁流变阻尼器受控结构各层的最大水平位移均明显减小,各层的最大水平加速度变化不大;在El Centro波作用下,未控结构的屈服点分布在2~5层柱端,有控结构没有屈服点,在Taft波作用下,未控结构屈服点分布在2~4层梁端和1~8层柱端,有控结构仅在2~6层柱端有屈服点,在人工波作用下,未控结构的屈服点分布在2~3层梁端和2~6层柱端,有控结构仅在2~5层柱端有屈服点,说明铅-磁流变阻尼器可以控制高层RC结构的损伤发展过程、延缓结构的整体倒塌。
In order to study the damping effect of lead-magnetorheological damper on high-rise RC frame structure, a numerical simulation method was used to simulate the RC frame structure without lead-magnetorheological damper 12 layers) for nonlinear dynamic analysis. The results show that under the action of El Centro waves, Taft waves and artificial waves, the maximum horizontal displacement of the top edge nodes of the controlled structures decreases by 47.9%, 40.8% and 40.8% respectively compared with that of the uncontrolled structures, and the maximum lateral displacement of the top edge nodes of the controlled structures Compared with the uncontrolled structure, the maximum horizontal displacement of the controlled structures of lead-magnetorheological damper obviously decreases and the maximum horizontal acceleration of each layer does not change much. In El Under Centro wave, the yield point of uncontrolled structure is distributed on the 2 ~ 5 column ends, and the controlled structure has no yield point. Under the action of Taft wave, the yield point of uncontrolled structure is distributed on the beam ends of 2 ~ 4 layers and 1 ~ 8 Layer column ends, the controlled structure only 2 to 6 column ends have yield point, under the action of artificial waves, the yield point of uncontrolled structure distributed in 2 to 3 beam ends and 2 to 6 column ends, controlled structure The yield point only appears at the 2 ~ 5 pillars, which shows that the lead-magnetorheological damper can control the damage development of high-rise RC structures and delay the overall structural collapse.