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（1 清華大學(xué)土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室，北京 100084；2 揚(yáng)州大學(xué)建筑科學(xué)與工程學(xué)院，揚(yáng)州 225009）

［摘要］提出在普通鋼筋混凝土剪力墻的邊緣構(gòu)件和截面中部配置多根鋼管的新型鋼管混凝土組合剪力墻形式，完成了2個(gè)新型鋼管混凝土組合剪力墻試件和1個(gè)普通鋼筋混凝土剪力墻試件在高軸壓比下的低周反復(fù)加載試驗(yàn)，研究其破壞形態(tài)、承載力、變形能力、剛度、滯回耗能、應(yīng)變分布等抗震性能。結(jié)果表明，試件的破壞形態(tài)為壓彎破壞，鋼管的加入減輕了墻底混凝土和鋼筋的破壞程度，限制了剪切斜裂縫的發(fā)展；新型鋼管混凝土組合剪力墻試件的承載力比普通鋼筋混凝土剪力墻試件提高25%左右；峰值位移角為1/100～1/75，極限位移角達(dá)到1/50，極限變形能力比普通鋼筋混凝土墻提高30％左右。新型鋼管混凝土組合剪力墻試件的滯回曲線比較飽滿，剛度和強(qiáng)度退化過程比較平緩?？傮w來看，新型鋼管混凝土組合剪力墻具有較好的抗震性能，其抗彎承載力可以按普通鋼筋混凝土剪力墻進(jìn)行計(jì)算，但將鋼管等效為鋼筋參與計(jì)算，結(jié)果過于保守，應(yīng)適當(dāng)考慮鋼管對(duì)混凝土的約束作用。

［關(guān)鍵詞］鋼管混凝土組合剪力墻; 抗震性能; 試驗(yàn); 高軸壓比

中圖分類號(hào)：TU398      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)07-0093-06

Experimental study on seismic behavior of a new type of concrete filled steel tube composite shear walls

Yang Guang1, Zhao Zuozhou1, Qian Jiaru1, Liu Xu1,2

（1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225009, China）

Abstract: A new type of concrete filled steel tubes (CFSTs) composite shear wall in boundary elements and near the center of a reinforced concrete (RC) shear wall cross section had been proposed. In order to study its seismic behavior, 2 composite shear wall specimens and 1 RC shear wall specimen were tested under cyclic lateral loading with high axial compression ratio. The failure mode, bearing capacity, deformation capacity, stiffness, hysteretic characteristics, strain distribution of specimens had been considered. It has proved that the failure mode of all specimens is flexural failure near wall bottom zone under high axial load. Existing of the CFSTs can significantly reduce the compressive deformation near the wall bottom zone and restrict the developing of the inclined shear cracking. Compared to the RC shear wall specimen, the bearing capacity of the composite specimens is improved about 25%, and the peak drift angle and ultimate drift angle of the composite specimens are about 1/100～1/75 and 1/50, respectively. The ultimate deformation capacity of the composite specimens is increased about 30% compared to that of the RC shear wall specimen. The hysteretic curves are full，the strength and stiffness degradation process of the composite specimens are smoothly. Overall, the new composite shear wall behaves much better. Its flexural capacity can be designed in the same way as a RC shear wall, in which the steel tubes can be equivalent to reinforcement and the concrete confinement from the steel tube should be considered.

Keywords: concrete filled steel tube composite shear wall; seismic behavior; test; high axial compression ratio

*國(guó)家科技支撐計(jì)劃計(jì)劃項(xiàng)目（2012BAJ07B01）。

通訊作者：趙作周，博士，副教授，Email:zzzhao@tsinghua.edu.cn。

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