张锡治 ,张玉鑫 ,张群礼 ,张天鹤 ,王 龙
AuthorsHTML:张锡治 ^{1, 2}，张玉鑫 ² ，张群礼 ² ，张天鹤 ² ，王 龙 ³
AuthorsListE:Zhang Xizhi,Zhang Yuxin,Zhang Qunli,Zhang Tianhe,Wang Long
AuthorsHTMLE:Zhang Xizhi^{1, 2}，Zhang Yuxin²，Zhang Qunli²，Zhang Tianhe²，Wang Long³
Unit:1. 天津大学建筑设计规划研究总院有限公司，天津 300072；
2. 天津大学建筑工程学院，天津 300072；
3. 天津港股份有限公司，天津 300461

Unit_EngLish:1. Tianjin University Architectural Design Planning Research Institute Co.，Ltd.，Tianjin 300072，China；
2. School of Civil Engineering，Tianjin University，Tianjin 300072，China；
3. Tianjin Port(Group)Co.，Ltd.，Tianjin 300461，China

Abstract_Chinese:为研究密肋砂加气复合墙体作为钢框架结构内嵌柔性连接填充墙时的破坏模式和刚度变化规律，对 4 片足 尺复合墙体试件进行拟静力试验，研究墙体在水平往复荷载下的力学行为及破坏机制，通过对比各试件的受力过 程、破坏形态及数据结果，分析墙体刚度、延性、耗能能力等抗震性能指标，以及钢筋混凝土肋柱配筋方式与肋柱 疏密对密肋砂加气复合墙体抗震性能的影响．结果表明：密肋砂加气复合墙体在水平往复荷载下的破坏模式均呈剪 切破坏，由于蒸压砂加气块与钢筋混凝土肋格的相互约束作用，砂加气块与肋格脱离但并未发生大面积剥落，仅角 部砂加气块与肋格节点处混凝土出现脱落现象，墙体试件裂缝分布均匀，肋格端部形成塑性铰，滞回曲线较为饱 满，位移延性系数均大于 6.9，变形能力较好．增加肋柱配筋并设螺旋箍筋或加密肋柱均可延缓墙体裂缝的开展与 延伸，提高墙体试件的承载力、刚度、弹塑性变形及耗能能力，其中增加肋柱配筋率并设螺旋箍筋对墙体抗震性能 提升的效果更为显著．基于试验结果，结合拟合法提出适用于密肋砂加气复合墙体刚度近似计算公式，对密肋砂加 气复合墙作为钢框架填充墙时其随框架侧移而变化的刚度进行了合理的取值研究，从而分析出在按照常遇地震弹性 设计时墙体对结构刚度的影响．
Abstract_English:To study the seismic behavior and stiffness changes that occur in a multi-ribbed composite wall when used as an embedded infill wall of a steel frame with flexible connection，pseudo-static tests were performed on four full scale composite walls，and the mechanical behaviors and failure mechanisms of the walls under horizontal reciprocating loads were studied. Comparing the stress processes，failure modes，and test results，the stiffness，ductility， energy dissipation，and other seismic performance indicators were analyzed，and influence of the reinforcement and density of the rib columns on the seismic behavior of the wall were studied. The results indicate that the failure mode of the walls under horizontal reciprocating load were shear failure. Due to mutual restraint of the blocks and ribs，the blocks were detached from the ribs. However，excluding corners of the blocks and joints of the ribs，only little flaking occurred. The cracks formed on the specimens were evenly distributed，and plastic hinges formed at the ends ofthe ribs. The hysteresis curves were relatively full，with good energy consumption capacity，and the displacement ductility coefficients exceeded 6.9. Thus，displaying excellent elastoplastic deformation performance. Increasing the reinforcement or number of rib columns can restrain the cracking development and improve the bearing capacity， stiffness，deformation，and energy consumption capacity of the specimens. The influence of the reinforcement was significant. Based on the test results，formulas were proposed to approximately calculate the wall stiffness using the fitting method. When the multi-ribbed sand aerated composite walls were used as a steel frame infill wall，the stiffness change due to the change in the frame was reasonable. Based on the analysis，we obtained the influence of the wall on the structure’s rigidity when the elastic design was in accordance with frequently encountered earthquakes.
Keyword_Chinese:密肋砂加气复合墙；抗震性能；拟静力试验；初始刚度
Keywords_English:multi-ribbed sand aerated composite wall；seismic performance；quasi-static test；initial stiffness

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