反复荷载下型钢再生混凝土柱抗震性能试验研究

发布时间：2018-05-17 23:25

本文选题：型钢混凝土 + 再生混凝土柱　；参考：《土木工程学报》2014年01期

【摘要】：为研究型钢再生混凝土柱的破坏形态和抗震性能,对10个不同剪跨比、再生粗骨料取代率、轴压比、体积配箍率的型钢再生混凝土柱进行低周反复荷载试验,观察其受力过程及破坏形态,分析不同设计参数对荷载-位移滞回曲线、骨架曲线、承载能力、延性、耗能能力及刚度退化等力学性能的影响。试验研究结果表明:型钢再生混凝土柱的主要破坏形态为剪切斜压破坏、弯剪破坏以及弯曲型破坏,破坏形态与剪跨比有关;滞回曲线大多呈梭形且较为饱满,说明型钢再生混凝土柱具有较好的延性及耗能能力;取代率对试件承载力影响不明显,延性及耗能能力随取代率的增加而有所降低;随着轴压比的增大,试件承载力有一定提高,但其衰减加快,且延性及耗能能力降低;增大体积配箍率时,试件承载力增大不明显,但延性及耗能能力显著提高。总体上看,型钢再生混凝土柱具有较好的抗震性能,可以通过合理的设计将其应用于抗震结构中。
[Abstract]:In order to study the failure pattern and seismic behavior of steel recycled concrete columns, 10 steel reinforced concrete columns with different shear span ratio, recycled coarse aggregate replacement ratio, axial compression ratio and volume hoop ratio were tested under low cycle cyclic loading. The mechanical properties such as load-displacement hysteretic curve, skeleton curve, load-bearing capacity, ductility, energy dissipation capacity and stiffness degradation were analyzed. The experimental results show that the main failure modes of steel reinforced concrete columns are shear baroclinic failure, bending shear failure and bending failure, which are related to the shear span ratio, and the hysteretic curves are mostly fusiform and full. The results show that the steel reinforced concrete column has better ductility and energy dissipation capacity, the substitution ratio has no obvious effect on the bearing capacity of the specimen, the ductility and energy dissipation capacity decrease with the increase of the replacement ratio, and the axial compression ratio increases. The bearing capacity of the specimen is increased, but its attenuation is accelerated, and the ductility and energy dissipation capacity is decreased. When the volume hoop ratio is increased, the bearing capacity of the specimen increases little, but the ductility and energy dissipation capacity increase significantly. In general, steel reinforced concrete columns have good seismic performance and can be used in seismic structures through reasonable design.
【作者单位】：西安建筑科技大学;
【基金】：国家自然科学基金(51178384) 陕西省留学人员科技活动择优资助项目(陕外专发[2010]26号) 住房和城乡建设部科学技术项目(2012-K2-12) 陕西省教育厅科研计划项目(12JK0902) 长江学者和创新团队发展计划项目
【分类号】：TU398.9;TU352.11

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