基于子结构试验方法的SMA-PRM阻尼器防高墩桥梁地震碰撞效能研究

发布时间：2018-01-12 20:10

本文关键词：基于子结构试验方法的SMA-PRM阻尼器防高墩桥梁地震碰撞效能研究　出处：《西南科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：实际震害表明,工程结构地震破坏往往只发生在结构的某些部位或构件上,其它部分仍处于完好或基本完好的状态。子结构试验方法作为一种最新的结构抗震试验方法,提出将结构中容易破坏的、有复杂非线性的部分作为试验子结构进行物理试验,而处于完好或基本完好的线性部分作为计算子结构用计算机进行模拟分析,实现了物理试验和数值模拟计算的有机结合,不仅能够模拟结构在地震作用下的真实反应,而且显著降低了对试验设备和试验模型的要求。本文基于子结构试验方法的基本思想和高墩桥梁模型振动台试验结果,利用Matlab/simulink软件建立并验证了子结构试验仿真程序,并将其用于形状记忆合金金属橡胶(Shape Memory Alloy Pseudo-rubber Metal,SMA-PRM)阻尼器防高墩桥梁地震碰撞的减振效能研究。本文主要研究内容为:(1)进行了SMA-PRM阻尼器不同频率、位移幅值的往复加载试验,研究了SMA-PRM阻尼器的力学性能,并建立了其本构关系模型。(2)基于子结构试验方法的基本思想,依据高墩桥梁(设置SMA-PRM阻尼器)模型振动台试验结果,利用Matlab/simulink软件建立高墩桥梁(设置SMA-PRM阻尼器)子结构试验仿真程序,并验证了其有效性,实现了子结构试验方法的数值仿真。(3)运用高墩桥梁(设置SMA-PRM阻尼器)子结构试验仿真程序,将高墩桥梁模型地震碰撞振动台试验台面输入的3条地震动(EI Centro地震动、Taft地震动和人造地震动)作为输入,进行了子结构试验仿真分析,并与不同碰撞间隙(0.01m和0.015m)的高墩桥梁模型振动台试验结果进行对比,探讨了SMA-PRM阻尼器防高墩桥梁地震碰撞的减振效能。研究结果表明在高墩桥梁中设置SMA-PRM阻尼器后,能够防止相邻跨桥梁发生地震碰撞,有效降低高墩桥梁的整体地震反应,从而提高了高墩桥梁的整体抗震性能。
[Abstract]:The actual earthquake damage shows that the earthquake damage of engineering structure usually occurs only in some parts or components of the structure. The other parts are still in good condition or basically intact. The substructure test method, as a kind of latest seismic test method, is put forward to destroy easily in the structure. The parts with complex nonlinearity are used as test substructures for physical tests, while the linear parts which are in good or basic integrity are simulated and analyzed by computer as computational substructures. The organic combination of physical experiment and numerical simulation can not only simulate the real response of structure under earthquake. Moreover, the requirements for test equipment and test model are significantly reduced. This paper is based on the basic idea of substructure test method and the test results of high pier bridge model vibration table. The simulation program of substructure test is established and verified by Matlab/simulink software. It was used in shape Memory Alloy Pseudo-rubber Metal of shape memory alloy. SMA-PRM) dampers are used to study the effectiveness of anti-seismic impact of high-pier bridges. The main contents of this paper are: 1) the SMA-PRM dampers are carried out at different frequencies. The mechanical properties of SMA-PRM damper are studied by reciprocating loading test of displacement amplitude, and the constitutive relation model of SMA-PRM damper is established, which is based on the basic idea of substructure test method. According to the test results of high pier bridge (with SMA-PRM damper) model vibration table test. The simulation program of substructure test of high pier bridge (with SMA-PRM damper) is established by using Matlab/simulink software, and its validity is verified. The numerical simulation of substructure test method is realized. 3) the substructure test simulation program of high pier bridge (with SMA-PRM damper) is implemented. The input of three seismic motions (ei Centro ground motion and artificial ground motion) from the seismic impact table test table of the high pier bridge model is taken as the input. The simulation analysis of substructure test is carried out, and the results are compared with the shaking table test results of high pier bridge model with different impact clearance of 0.01m and 0.015m. In this paper, the effectiveness of SMA-PRM dampers in preventing seismic collisions of bridges with high piers is discussed. The results show that the installation of SMA-PRM dampers in bridges with high piers can prevent the seismic collisions of adjacent bridges. The whole seismic response of high pier bridge is reduced effectively, and the overall seismic performance of high pier bridge is improved.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55

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