钢骨截面延展性对高含钢率SRC柱滞回性能的影响研究

发布时间：2018-04-23 12:16

本文选题：钢骨混凝土柱 + 高含钢率　；参考：《土木工程学报》2016年03期

【摘要】：在"钢骨截面延展性对高含钢率SRC柱静力性能的影响研究"的基础之上,该文通过一组含钢率为15%的SRC压弯构件反复加载试验,结合理论分析和有限元数值计算,研究了钢骨截面延展性对高含钢率SRC柱骨架曲线、滞回曲线、耗能能力和延性等抗震性能指标的影响,并分析了钢骨、钢筋和混凝土相互作用的机理。研究表明:1构件承载能力和耗能能力随钢骨截面延展性系数D提高而线性增加;2承载能力、耗能能力、延性和卸载刚度均随钢骨截面模量因子α的增大而显著增大;承载能力随约束混凝土因子β线性增加,但β对滞回曲线和变形能力的影响很小;3在加载后期,钢骨翼缘的局部屈曲和混凝土压溃退出工作是导致承载力下降的主要原因;构件的后期承载力、延性和耗能主要依赖于钢骨的贡献。
[Abstract]:On the basis of "study on the influence of steel section ductility on static behavior of SRC column with high steel content", a group of SRC compression and bending members with steel content of 15% are subjected to repeated loading tests, combined with theoretical analysis and finite element numerical calculation. The influence of steel section ductility on the seismic performance of SRC column with high steel content is studied. The mechanism of the interaction between steel bone, steel bar and concrete is analyzed, including the seismic performance index such as skeleton curve, hysteretic curve, energy dissipation capacity and ductility. The results show that the load-carrying capacity and energy-dissipation capacity of the W1 member increase linearly with the increase of ductility coefficient D of the steel section, and the load capacity, energy dissipation capacity, ductility and unloading stiffness increase significantly with the increase of the modulus factor 伪 of the steel section. The bearing capacity increases linearly with confined concrete factor 尾, but the effect of 尾 on hysteretic curve and deformation capacity is very small. At the later stage of loading, the local buckling of steel flange and concrete collapsing are the main reasons for the decrease of bearing capacity. The later bearing capacity, ductility and energy dissipation of members mainly depend on the contribution of steel bone.
【作者单位】：同济大学;华东建筑设计研究院有限公司;
【基金】：土木工程防灾国家重点实验室自由探索课题(SLDRCE15-B-01) 国家自然科学基金(90815029)
【分类号】：TU398.9

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