强震作用下连续梁桥多墩联合半主动控制

发布时间：2018-07-12 14:25

本文选题：连续梁桥 + 桥墩损伤　；参考：《天津大学学报(自然科学与工程技术版)》2014年07期

【摘要】：为了平均分配连续梁桥各墩的损伤,提出了一种多墩联合半主动控制算法.该控制算法在主动最优控制力的基础上,综合考虑连续梁桥各墩的损伤状态,通过调整阻尼器的目标出力,在主梁加速度和各桥墩的墩顶与主梁间相对位移得到控制的同时,使各桥墩的损伤指数平均分配.本文以一设置了磁流变(MR)阻尼器的3跨连续梁桥为研究对象,采用MATLAB进行数值模拟分析,对所提出的半主动控制算法进行了多种工况下的验证.计算结果表明,采用多墩联合半主动控制算法能够较好地控制桥梁的地震反应,同时有效降低破坏最严重的桥墩在强震过程中的损伤指数,达到各桥墩损伤平均分配的效果.
[Abstract]:In order to evenly distribute the damage of each pier of continuous girder bridge, a combined semi-active control algorithm with multiple piers is proposed. Based on the active optimal control force, the damage state of each pier of continuous beam bridge is considered synthetically. By adjusting the target force of dampers, the acceleration of the main beam and the relative displacement between the pier top and the main beam of the bridge pier are controlled, at the same time, the acceleration of the main beam and the relative displacement between the pier top and the main beam of the bridge pier are controlled at the same time. The damage index of each pier is equally distributed. In this paper, a 3-span continuous beam bridge with magneto-rheological (Mr) damper is taken as the research object. MATLAB is used to carry out numerical simulation and analysis, and the proposed semi-active control algorithm is verified under a variety of working conditions. The results show that the multi-pier combined semi-active control algorithm can effectively control the seismic response of the bridge, and effectively reduce the damage index of the most severely damaged pier during the strong earthquake, and achieve the effect of equally distributing the damage of each pier.
【作者单位】：天津大学滨海土木工程结构与安全教育部重点实验室;
【基金】：国家自然科学基金重大研究计划重点资助项目(90715032);国家自然科学基金国际合作项目(51021140003)
【分类号】：U442.55;U448.215

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