混凝土空心砌块填充墙RC框架抗震性能试验研究

通过对4榀单层单跨填充墙RC框架试件在水平低周往复荷载作用下的抗震性能试验，研究了填充墙砌块类型及高宽比对框架结构抗震性能的影响，对试件的破坏特征、滞回曲线、骨架曲线、位移延性、刚度退化、强度退化和耗能性能等进行了分析。试验结果表明：框架柱和填充墙的受剪承载力之比是影响结构破坏形态的重要因素，满足“强框架，弱填充墙”要求的4个试件均发生梁柱端塑性铰破坏，具有良好的抗倒塌性能；填充墙的存在影响了结构的滞回性能，提高了框架结构的抗侧刚度、水平承载力和滞回耗能能力；在相同位移幅值下，混凝土空心砌块填充墙的破坏程度比实心黏土砖填充墙的严重，存在一定的安全隐患。

Experimental study on seismic behavior of RC frames infilled with concrete hollow blocks

Four reinforced concrete frames with infilling walls were tested under cyclic loading to investigate the effects of masonry material and height-width ratio on the seismic behavior of specimens.Based on the test results,the damage characteristics,load-displacement hysteretic curves,skeleton curves,bearing capacity,displacement ductility,rigidity degradation,strength degradation and energy dissipation were analyzed.The test results indicate that the shear strength ratio of frame to infilling wall is a critical factor that influences the failure mode of frame.Plastic hinges occur at the end of column and beam.A satisfactory collapse-resistance is observed for the specimens which can meet the principle of ’strong frame and weak infilling wall’.The infilling wall enhances the lateral stiffness,ultimate capacity,the energy dissipation capacity of frames.And the hysteretic characteristics of frames.The damage degree of concrete hollow blocks infilling wall is more serious than that of solid clay bricks.