圆钢管再生混凝土柱抗震性能与影响因素分析
发布时间：2019-05-10 00:29
【摘要】：为了研究圆钢管再生混凝土柱的抗震性能,以再生粗骨料取代率、长细比、轴压比和含钢率为变化参数,设计10个圆钢管再生混凝土柱试件进行低周反复加载试验,观察了其破坏过程及形态,获取其荷载-位移滞回曲线。基于试验实测数据基础,深入分析了各变化参数对强度、刚度、位移延性和耗能系数等抗震性能指标的影响规律。研究结果表明:在破坏形态上,钢管再生混凝土柱与普通钢管混凝土柱相似,均表现为底部钢管鼓曲、混凝土被压碎。钢管再生混凝土柱的滞回曲线饱满,其形状从梭形发展到弓形。钢管再生混凝土柱的各项抗震性能指标能满足现有抗震规范要求,在地震区推广应用钢管再生混凝土柱可行。随着长细比的减小,试件耗能系数减小,而其他抗震性能指标增加。除刚度随轴压比的减小而减小外,其他抗震性能指标对现有的设计参数变化范围并不敏感。试件壁厚优势在强度、弹性阶段刚度和破坏点耗能系数等方面表现较为显著。
[Abstract]:In order to study the seismic behavior of recycled concrete columns with circular steel tubes, 10 specimens of recycled concrete columns with circular steel tubes were designed to carry out low cycle repeated loading tests with the replacement ratio of recycled coarse aggregate, slenderness ratio, axial compression ratio and steel content as variable parameters. The failure process and shape were observed, and the load-displacement hysteresis curve was obtained. Based on the measured data, the effects of various parameters on seismic performance indexes, such as strength, stiffness, displacement ductility and energy dissipation coefficient, are analyzed in detail. The results show that the recycled concrete filled steel tube column is similar to the ordinary concrete filled steel tube column in the failure form, which shows that the bottom steel tube is bulged and the concrete is crushed. The hysteretic curve of recycled concrete columns with steel tubes is full, and its shape develops from fusiform to bow. The seismic performance indexes of recycled concrete filled steel tubular columns can meet the requirements of the existing seismic code, and it is feasible to popularize and apply recycled concrete filled steel tubular columns in seismic areas. With the decrease of the slenderness ratio, the energy dissipation coefficient of the specimen decreases, while the other seismic performance indexes increase. Except that the stiffness decreases with the decrease of axial compression ratio, other seismic performance indexes are not sensitive to the variation range of existing design parameters. The advantages of wall thickness of specimens are obvious in strength, stiffness in elastic stage and energy dissipation coefficient of failure point.
【作者单位】： 广西大学土木建筑工程学院;河南理工大学土木工程学院;
【基金】：国家自然科学基金项目(51268004) 广西自然科学基金项目(2012GXNSFAA053203) 广西理工科学实验中心重点项目(LGZX201102)
【分类号】：TU398.9
[Abstract]:In order to study the seismic behavior of recycled concrete columns with circular steel tubes, 10 specimens of recycled concrete columns with circular steel tubes were designed to carry out low cycle repeated loading tests with the replacement ratio of recycled coarse aggregate, slenderness ratio, axial compression ratio and steel content as variable parameters. The failure process and shape were observed, and the load-displacement hysteresis curve was obtained. Based on the measured data, the effects of various parameters on seismic performance indexes, such as strength, stiffness, displacement ductility and energy dissipation coefficient, are analyzed in detail. The results show that the recycled concrete filled steel tube column is similar to the ordinary concrete filled steel tube column in the failure form, which shows that the bottom steel tube is bulged and the concrete is crushed. The hysteretic curve of recycled concrete columns with steel tubes is full, and its shape develops from fusiform to bow. The seismic performance indexes of recycled concrete filled steel tubular columns can meet the requirements of the existing seismic code, and it is feasible to popularize and apply recycled concrete filled steel tubular columns in seismic areas. With the decrease of the slenderness ratio, the energy dissipation coefficient of the specimen decreases, while the other seismic performance indexes increase. Except that the stiffness decreases with the decrease of axial compression ratio, other seismic performance indexes are not sensitive to the variation range of existing design parameters. The advantages of wall thickness of specimens are obvious in strength, stiffness in elastic stage and energy dissipation coefficient of failure point.
【作者单位】： 广西大学土木建筑工程学院;河南理工大学土木工程学院;
【基金】：国家自然科学基金项目(51268004) 广西自然科学基金项目(2012GXNSFAA053203) 广西理工科学实验中心重点项目(LGZX201102)
【分类号】：TU398.9
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