配筋砌块砌体剪力墙连梁抗震性能的试验研究

本文通过16个配筋砌块砌体剪力墙连梁的伪静力试验研究了配筋砌块连梁的抗震性能,考察了跨高比和配筋率两个影响因素。探讨了不同影响因素下连梁在水平往复荷载作用下的破坏特征、承载能力、滞回性能、骨架曲线、延性、耗能比等问题;对比了砌块连梁和混凝土连梁通过配筋加强后的相应特征的异同。试验结果表明:配筋砌块连梁破坏反映了砌块组砌的特点,从破坏形态角度可分为剪切、弯曲和剪弯三种类型;由滞回曲线可以看出,配筋砌块连梁具有良好的抗震性能,所得的归一化骨架曲线为进一步进行配筋砌块剪力墙结构整体工作的计算分析提供必要的数据。

Experimental Study on Seismic Behavior of Reinforced Coupling Beam of Shear Wall with Small Size Concrete Hollow Blocks

In this paper,a restoring force experimental investigation on the seism ic behavior of reinforced coupling b eam of shear wall with small size concrete hollow blocks and one fourth scale models have been carried out.The span depth ratio and the reinforcement ratio are the main variables of the tests.Six teen specimens are subjected to cyclic loading by a suitable experimental set-up.The test results show that the span depth ratio and the reinforcement ratio have signif-icant effects on failure modes,bearing capacity,hysteretic characteristics skeleton curves,ductility a nd ratio of energy dissipation under cyclic loading.T he similarities and differences of t he characteristics between block coupling beams and concrete coupling beams after strengthening by reinforcement have b een compared.The failure patterns o f the re-inforced block coupling beams refle ct for the three kinds of failure modes,namely shear,moment and moment-s hear failures.Characteristics of block masonry built by laying blocks have b een appeared.16hysteresis loops sh ow that test specimens have favorable seismic behavior.The normalized skeleton cur ves of 16hysteresis loops can provid e essential data for further analysis on shear wa ll structure.