T形RAC短肢剪力墙抗震性能试验与极限承载力分析  

Experimental Study of Seismic Resistance Performance of T-Shaped Short-Leg Shear Wall and its Ultimate Bearing Capacity Analysis

作　　者：樊禹江[1] 余滨杉[2] 苗晓瑜[1] 熊二刚[1] 

机构地区：[1]长安大学,陕西西安710061 [2]西安建筑科技大学,陕西西安710065

出　　处：《实验力学》2016年第3期332-340,共9页Journal of Experimental Mechanics

基　　金：国家自然科学基金(51178388);陕西省教育厅重点实验室科研计划项目(13JS050);陕西省博士后科研项目资助;陕西省工业攻关项目(2013K07-07)

摘　　要：通过对4个缩尺比例为1∶2的不同再生粗骨料取代率、不同轴压比的T形再生混凝土(RAC)短肢剪力墙结构模型进行低周反复荷载作用下的抗震性能试验,分析试验所得模型破坏形态、滞回曲线、正负向特征荷载的变化规律。结果表明,T形RAC短肢剪力墙具有良好的抗震性能;同时,随着再生粗骨料取代率的增加,滞回性能等指标逐渐增强,而随着轴压比的增大,各指标逐渐减小。最后,通过试验结果分析,建立了T形RAC短肢剪力墙正截面极限承载力计算公式,并在此基础之上推导了其水平极限承载力计算公式。利用所建公式对4个模型水平极限承载力进行计算,所得结果与试验结果基本吻合,平均误差仅为9.45%。上述结果表明:该公式能够应用于实际T形RAC短肢剪力墙的设计计算之中。Low cycle repeated loading experiment was carried out for 4 T-shaped recycled aggregate concrete（RAC）short-leg shear wall models（reduced scale is 1∶2）with different recycled coarse aggregate replacement ratios and different axial compression ratios,to study their seismic resistance capacity.Experimental results,including model damage pattern,hysteretic curve and the variation of forward and reverse characteristic load were analyzed.Results indicate that T-shaped RAC short-leg shear wall has good seismic resistance capacity;meanwhile,with the increase of recycled coarse aggregate replacement ratio,hysteretic behavior and other indicators gradually increase;while,with the increase of axial compression ratio,all indicators decrease gradually.Finally,through analysis of experimental results,a formula calculating normal ultimate bearing capacity for T-shaped RAC shortleg shear wall was established.Based on which,another formula calculating horizontal ultimate bearing capacity was also derived.Ultimate horizontal bearing capacity for 4models was calculated by above formula,obtained results are basically consistent with experimental ones with only 9.45%average error.Above mentioned results indicate that the formulas proposed in this paper can be applied to calculate actual design for T-shaped RAC short-leg shear wall.

关 键 词：再生混凝土 T形短肢剪力墙 抗震性能 极限承载力 

分 类 号：TU317[建筑科学—结构工程]