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对7榀1/2.5比例单层单跨型钢再生混凝土框架-再生砌块填充墙模型进行低周反复荷载作用下的抗震性能试验研究,分析了墙体设置形式、填充墙砌块强度、拉筋构造形式、轴压比以及墙体宽高比等设计参数对该种结构抗震性能的影响。研究了模型的典型破坏形态、荷载-位移曲线、承载能力以及位移延性等。结果表明:试验模型的典型破坏形态均符合“强柱弱梁”的破坏模式,框架部分的破坏程度随墙体全高填砌而减轻;在框架中加设墙体后可明显提高结构承载力和初始刚度,墙体填充率越大、填充墙砌块强度越高、拉筋间距越小、轴压比越高、墙体宽高比越大,结构承载力与初始刚度提高越明显;结构的位移延性均值达到6.26,高于钢筋再生混凝土框架-填充墙、普通钢筋混凝土框架-填充墙以及钢筋混凝土异形柱框架-填充墙等结构,抗倒塌能力较强。在试验研究的基础上,通过有限元与试验结合的方法,建立了相应的四折线恢复力模型,可用于型钢再生混凝土框架结构的弹塑性地震反应分析。
Experimental study on the seismic behavior of 7 榀 1 / 2.5 single-span single-span SRC-RCB-filled recycled concrete masonry walls subjected to cyclic low-cycle loading is carried out. The influences of the installation forms, Structure, axial compression ratio and wall-to-wall ratio and other design parameters on the seismic performance of the structure. The typical failure mode, load - displacement curve, bearing capacity and displacement ductility were studied. The results show that the typical failure modes of the test model are in accordance with the failure mode of “strong column and weak beam”, and the degree of damage of the frame part is reduced with the filling of the whole height of the wall. Adding the wall to the frame can obviously improve the bearing capacity of the structure The higher the wall-to-wall ratio is, the stronger the bearing capacity and the initial stiffness are. The average displacement ductility of the structure reaches to 6.26, which is higher than that of reinforced concrete recycled frame-filled wall, ordinary reinforced concrete frame-filled wall and reinforced concrete special-shaped column frame-filled wall. Based on the experimental study, the corresponding four fold line restoring force model is established through the combination of finite element and experiment, which can be used to analyze the elasto-plastic seismic response of profiled steel recycled concrete frame structure.