【摘要】 设计了5个截面长宽比不同的矩形钢管混凝土构件,对其进行了拟静力试验,分析其在低周反复荷载作用下的破坏形态、承载能力、变形能力、延性、滞回模型、耗能能力、强度退化、刚度退化等受力特性及抗震性能。研究结果表明,矩形钢管混凝土结构具有良好的耗能能力和塑性变形能力。截面长宽比不但影响曲线的数值,还会影响曲线的形状,随着截面长宽比的增大,水平承载力明显提高,但试件的延性、变形能力和耗能能力有所下降,刚度退化、强度退化和试件受滑移的影响越来越明显。更多还原

【Abstract】 In this paper,five concrete-filled rectangular steel tube columns are designed,and the quasi-static test was done to it.Analyzed the destroy shape,bearing capacity,ductility and ability of deformation,hysteresis behavior,ability of consume energy,intensity degradation,rigidity degradation of specimens,and so on.The result of study indicate that the columns have good ability of consume energy and ability of plastic deformation.The depth-to width ratio of section not only influence value of curve,but also influence the shape of curve.As the depth-to width ratio of section augment the level bearing capacity increase obviously,but ductility,ability of deformation and ability of consume energy descend,and intensity degradation,rigidity degradation and influence of slippage to specimens become more obviously.更多还原