钢筋钢纤维高强混凝土剪力墙性能及受剪承载力

发布时间：2019-04-04 10:48

【摘要】：剪力墙是高层建筑中常见的抗侧力构件,其抗震性能是各国土木工程界研究的重点和热点。近年来高强混凝土的推广应用,使剪力墙的截面尺寸减小和脆性增大,其抗震性能方面的问题日益突出。为了克服高强混凝土的脆性,使剪力墙具有良好的抗震性能,本文在钢管混凝土边框组合剪力墙的基础上,在中间墙体加入钢纤维,形成钢管混凝土边框钢筋钢纤维混凝土剪力墙。通过5个钢管混凝土边框钢筋钢纤维混凝土剪力墙和1个钢管混凝土边框钢筋高强混凝土剪力墙的低周反复加载试验,研究了剪力墙试件裂缝的开展、破坏特征、滞回特性、承载力、刚度及其退化、延性及耗能能力;分析了钢纤维体积率、混凝土强度对剪力墙受剪承载力的影响及破坏机理。结果表明,钢纤维可有效限制剪力墙墙体裂缝宽度,改善裂缝形态,提高钢管混凝土边框钢筋钢纤维高强混凝土剪力墙受剪承载力、延性及耗能,减缓其强度退化;随着钢纤维体积率和混凝土强度的提高,钢管混凝土边框钢筋钢纤维高强混凝土剪力墙受剪承载力增长明显。最后,在试验研究与理论分析的基础上,结合混凝土结构相关规范和软化拉压杆模型,提出了适用于钢管混凝土边框钢筋钢纤维高强混凝土剪力墙受剪承载力的计算方法。
[Abstract]:Shear wall is a common anti-lateral force component in high-rise building, and its anti-seismic performance is the focus and hot spot of national civil engineering research. In recent years, the application of high-strength concrete has made the cross-section dimension of the shear wall to be reduced and the brittleness is increased, and the anti-seismic performance of the shear wall is becoming more and more serious. In order to overcome the brittleness of high-strength concrete, the shear wall has good anti-seismic performance. Through the low-cycle and repeated loading test of the reinforced high-strength concrete shear wall of steel fiber reinforced concrete shear wall and 1 steel tube concrete frame with 5 steel tube concrete frame, the development, failure characteristic, hysteretic property, bearing capacity, rigidity and degradation of the crack of the shear wall specimen are studied. The influence of the volume ratio of steel fiber and the strength of concrete on the shear bearing capacity of shear wall and the mechanism of failure are analyzed. The results show that the steel fiber can effectively limit the crack width of the wall of the shear wall, improve the fracture morphology, and improve the shear capacity, ductility and energy consumption of the steel fiber reinforced high-strength concrete shear wall of the steel pipe concrete frame, and reduce the strength degradation of the shear wall; and as the volume ratio of the steel fiber and the strength of the concrete are improved, The shear capacity of steel fiber reinforced high-strength concrete shear wall with steel-tube concrete frame is obviously increased. Finally, on the basis of the experimental research and the theoretical analysis, the calculation method of the shear capacity of the steel fiber reinforced high-strength concrete shear wall for the steel-tube concrete frame is put forward in combination with the relevant specifications of the concrete structure and the model of the softening and pulling-down bar.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.16

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