连接Maxwell模型的两相邻结构地震易损性分析

发布时间：2018-04-10 23:11

本文选题：相邻结构 + 地震易损性　；参考：《振动与冲击》2015年21期

【摘要】：对连接Maxwell模型的两相邻钢筋混凝土框架结构建立二维模型,考虑了梁柱单元及阻尼器单元在大震作用下的非线性行为,通过大量的增量动力分析(IDA),研究了Maxwell阻尼器优化参数理论表达式在结构经历初始弹性、屈服直至倒塌全过程的适用性,并基于IDA分析的结果,对结构未控和控制情况下的地震易损性曲线进行了比较分析,从性能评估的角度研究了Maxwell阻尼器对相邻结构在不同地震波及不同地震动强度水平下的控制效果。通过相邻结构在不同地震动强度水平下的顶层位移时程发现,Maxwell阻尼器在小震作用下对两结构顶层位移控制效果均较好,但是在大震作用下,仅对结构2有明显的控制效果;由控制和未控时的相邻结构的地震易损性曲线亦可看出,Maxwell阻尼器对结构2在各性能水平下的控制效果均优于结构1。最后,通过大量的参数化分析,基于相邻结构地震易损性最小原则提出了合适的阻尼器参数值。
[Abstract]:The two-dimensional model of two adjacent reinforced concrete frame structures connected with Maxwell model is established, and the nonlinear behavior of Liang Zhu element and damper element under the action of large earthquake is considered.Through a large number of incremental dynamic analysis, the applicability of the theoretical expression of optimization parameters of Maxwell dampers in the whole process of structure undergoing initial elasticity, yielding to collapse is studied. Based on the results of IDA analysis,The seismic vulnerability curves under uncontrolled and controlled structures are compared and analyzed. The control effects of Maxwell dampers on adjacent structures under different earthquake and earthquake intensity levels are studied from the point of view of performance evaluation.Through the displacement time history of adjacent structures at different ground motion intensity levels, it is found that Maxwell dampers have better control effect on the top floor displacement of the two structures under the action of small earthquakes, but only have obvious control effect on structure 2 under the action of large earthquakes.It can be seen from the seismic vulnerability curves of adjacent structures with or without control that the control effect of Maxwell dampers on structure 2 at different performance levels is better than that of structure 1.Finally, based on the principle of minimum seismic vulnerability of adjacent structures, a suitable damper parameter value is proposed through a large number of parameterized analysis.
【作者单位】：武汉工程大学资源与土木工程学院;华中科技大学土木工程与力学学院;
【基金】：湖北省教育厅科研项目(Q20141503) 国家自然科学基金(51408443)
【分类号】：TU311.3

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