【摘要】 进行了2个柱试件和5个梁-柱节点试件的伪静力试验,对试件局部采用钢套管约束措施,研究局部钢套管约束的RC柱的抗震性能及其对梁柱节点区的影响,分析试件的破坏形态、滞回特性、骨架曲线、变形性能、承载力和刚度退化及耗能能力等,并通过OpenSees软件对7个试件进行数值模拟。研究结果表明:局部设置钢套管约束RC柱能取得比传统RC柱更好的性能;局部设置钢套管约束梁-柱节点能够有效发挥梁的耗能能力;局部设置钢套管措施能够提高柱端约束,使塑性变形集中在梁端,实现“强柱弱梁”的设计要求。更多还原

【Abstract】 Quasi static tests of two column and five beam-column joint specimens,where partial tube confinement was provided,were conducted to investigate the effect of partial tube confinement on the seismic performance of columns and beam-column joints in terms of failure mode,skeleton curve,deformation characteristics,strength and stiffness degradation and energy dissipation capacity.Numerical simulations on the seven specimens using Opensees were also carried out.Test results indicate that the partially tube confined columns can achieve improved seismic performance than conventional concrete columns.By partially confining the column ends with steel tubes the energy dissipation capacity at beam ends can be further developed.The confinement effect can be enhanced at column ends and thus ensure the post-yield deformation to concentrate at beam ends,which fulfills the strong column and weak beam mechanism.更多还原