配置高强钢筋的混凝土矩形截面柱抗震性能试验研究

发布时间：2019-01-07 15:55

【摘要】：对10个配置HRB335、HRB500E、HRB600钢筋的混凝土矩形截面柱进行水平低周反复荷载作用下的拟静力试验,对比分析钢筋等体积和等强度代换时,纵筋强度、箍筋强度、混凝土强度等因素对试件破坏状态、滞回曲线、骨架曲线、受弯承载力及延性性能的影响。结果表明:配置不同强度钢筋的矩形截面柱试件均发生典型的弯曲破坏,柱底形成塑性铰,纵筋断裂,试件具有较好的变形能力和延性性能;钢筋等体积代换时,纵筋强度对试件承载力和变形能力影响较大,箍筋强度影响较小;钢筋等强度代换时,试件抗震性能基本保持不变,采用高强钢筋可以减小钢筋用量;随着混凝土强度的提高,试件刚度增大,导致屈服位移减小,位移延性系数增大。
[Abstract]:The pseudostatic test of 10 concrete rectangular section columns with HRB335,HRB500E,HRB600 reinforcement under horizontal low cycle cyclic loading is carried out. The strength of longitudinal reinforcement and stirrups is compared and analyzed when the reinforcement is replaced with equal volume and equal strength. The strength of concrete affects the failure state, hysteretic curve, skeleton curve, flexural capacity and ductility of the specimen. The results show that the specimens of rectangular section columns with different strength have typical bending failure, plastic hinge is formed at the bottom of column, longitudinal bars are broken, and the specimens have better deformation ability and ductility. When the steel bar is replaced by equal volume, the strength of longitudinal reinforcement has a great influence on the bearing capacity and deformation capacity of the specimen, while the strength of stirrups has little effect, while the seismic behavior of the specimen remains basically unchanged when the steel bar is replaced with the same strength, and the amount of steel bar can be reduced by using high strength steel bar. With the increase of concrete strength, the stiffness of the specimen increases, which leads to the decrease of yield displacement and the increase of displacement ductility coefficient.
【作者单位】：同济大学土木工程学院;中交公路规划设计院有限公司;
【基金】：贵州省“十二五”重大科技专项(黔科合重大专项[2011]6014) 国家重点基础研究发展计划(2013CB036305) 国家自然科学基金项目(51278373)
【分类号】：TU352.11;TU375.3

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