底部加强型钢管混凝土边框带钢筋暗撑组合剪力墙抗震性能试验研究

发布时间：2018-07-15 13:18

【摘要】：为研究底部加强型钢管混凝土边框带钢筋暗撑混凝土组合剪力墙抗震性能及损伤后性能,对普通型和底部加强型试件进行了两阶段低周反复荷载试验,第1阶段试验加载至位移角1/50停止,试件明显屈服损伤,卸载至水平位移恢复初始位置后,进行第2阶段低周反复荷载试验,直至试件严重破坏。分析了各试件的破坏特征、滞回特性、承载力、刚度退化、延性、耗能和应变,给出了承载力简化计算式。研究表明:混凝土墙体未损伤时,底部加强型组合剪力墙较普通型组合剪力墙损伤较轻,承载力提高了8.6%,其他性能接近;混凝土墙体有较大损伤后,底部加强型组合剪力墙剩余承载力高,变形能力大,耗能能力强,抗震性能退化相对较慢,具有较好的抗倒塌能力;给出的承载力计算式可较好的预测其承载力。
[Abstract]:In order to study the seismic behavior and post-damage behavior of reinforced concrete filled steel tube (CFST) reinforced concrete composite shear wall with steel-reinforced ribbed frame at the bottom, two stage low cycle cyclic loading tests were carried out on the common and bottom reinforced concrete composite shear walls. In the first stage, when the displacement angle stops at 1 / 50, the specimen is obviously damaged by yield. After unloading to the initial position of horizontal displacement, the second stage low cycle repeated load test is carried out until the specimen is seriously damaged. The failure characteristics, hysteresis characteristics, bearing capacity, stiffness degradation, ductility, energy dissipation and strain of each specimen are analyzed. The results show that when the concrete wall is not damaged, the bottom reinforced composite shear wall is less damaged than the common composite shear wall, the bearing capacity is increased by 8.6%, and the other properties are close to each other. The bottom reinforced composite shear wall has high residual bearing capacity, large deformation capacity, strong energy dissipation capacity, relatively slow degradation of seismic performance, good anti-collapse ability, and the calculation formula of bearing capacity can better predict its bearing capacity.
【作者单位】：北京工业大学建筑工程学院;
【基金】：国家自然科学基金项目(51478020);国家自然科学基金重大研究计划集成项目(91315301)
【分类号】：TU398.9

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