填充墙RC框架结构抗连续性倒塌研究

Research on the Progressive Collapses Resistance Performance of RC Frame Structure Including Effects of Infill Walls

论文基于备用荷载路径原理,采用非线性静力和非线性动力分析方法,研究了填充墙的布置对框架结构连续性倒塌性能的影响。建立一个4层RC框架结构模型,分别对纯框架结构和考虑填充墙布置的框架结构进行了分析。移除首层框架中柱,分析剩余结构在移除柱后的动力响应。分析结构表明,填充墙不仅能承受一定的竖向荷载,还能增大剩余结构的延性和失效跨内荷载重分配的范围,减小失效点的竖向位移,从而提高了结构的抗连续性倒塌能力。填充墙的不均匀布置对结构抗连续性倒塌性能有明显的消弱作用,在进行结构抗连续性倒塌设计时,应特别注意填充墙的数量和布置方式,避免形成薄弱层。

In this paper,an alternate load path based analysis approach nonlinear static and nonlinear dynamic methoddogies,study the dffect of the location of the layout of the inlilled wall on the progressive collapse,performance of frame structure were investigated using.A four-story frame structure model is establelished for analysis pure frame structure and the frame structure of the considered layout of the infillde wall. The bottom of columns were removed from analysis and the ability of remaining structures to successfully abserb member loss was investigated. The simulation results show that infill walls were not only support a certain degree of vertical loads but also extend the remaining structure ductility and the extend of inner loads redistribution on failure span,evidently reducing the vertical displancement on failure spot and uniforming the axial force on all columns. The nonuniform layout of the infill walls have obvious weakening effect on the capacity of progressive collapses resistance performance o f flame structure,the number and the location of the infilled wall should pay special attention to when desiring,avoid formation the weak layer