【摘要】 通过一榀二跨二层预压装配式预应力混凝土框架拟动力试验,研究了预压装配式框架的破坏机制、变形性能、刚度退化及耗能能力等抗震性能,并对模型结构进行弹塑性动力分析。研究表明,预压装配式预应力结构有着很强的变形恢复能力,框架节点处于双向受压状态,节点刚度和核心区抗裂性得到增强,提高了框架整体抗侧刚度。在竖向和水平力的作用下,梁端在叠加的负弯矩作用下率先出现塑性铰,可实现"强柱弱梁"的设计要求,预压装配式预应力结构具有良好的抗震性能。更多还原

【Abstract】 Pseudo dynamic test was conducted on two storey double-span post-tensioned precast prestressed concrete model frame.Failure mechanism,deformation properties,rigidity degradation and energy dissipation capacity of the structure under seismic action were investigated,and the elastic-plastic dynamic analysis of model structure was carried out.The results of study show that the post-tensioned precast prestressed frame has strong deformation recovery capabilities,the connections of frame is in bi-directional compression condition.Enhancing joint stiffness and increasing crack resistance in the core area,will improve the frame lateral rigidity and deformation recovery capabilities.The plastic hinge firstly appears at beam end under the vertical and horizontal force action.The"strong column and weak beam" design requirements can be satisfied.更多还原