论文部分内容阅读
以偏心距为主要控制参数,对两组共6个密置焊接环式复合箍筋约束高强混凝土柱进行大、小偏心受压静力加载试验研究和有限元数值模拟对比分析。研究结果表明,焊接环式箍筋的约束作用可以较大地提高高强混凝土偏心受压柱的极限承载力、延性性能和受压区混凝土的极限压应变,对改善柱的受力和变形性能、提高结构的抗震性能具有重要意义。建议考虑密置焊接环式复合箍筋对混凝土的约束作用,适当修改规范中偏心受压柱极限承载力计算公式。
Taking the eccentricity as the main control parameter, the experimental study and finite element numerical simulation of two groups of high-strength concrete columns with 6 confined welded ring composite stirruns constrained by large and small eccentric compression were carried out. The results show that the restraint effect of welded ring stirrup can greatly improve the ultimate bearing capacity and ductility of high strength concrete eccentric compression column and the ultimate compressive strain of concrete in compression zone to improve the stress and deformation performance of the column Seismic performance of the structure is of great significance. It is suggested to consider the confinement effect of dense welded ring composite stirrups on concrete and to modify the formula of the ultimate bearing capacity of eccentric compression columns in the code.