【摘要】 本文对1∶2比例非延性RC框架进行了主余震序列作用下的振动台试验,并对模型的破坏形态、动力特性以及位移反应等进行了分析。输入的主余震序列为三组真实地震动,加载方案采用两个方向分别单向加载以及双向同时加载。实验结果显示:结构的破坏主要发生在梁柱与节点的连接处;随着主余震序列幅值的增大,结构的损伤逐步累积导致结构一阶周期变大;真实主余震序列对结构的损伤与其频率特性密切相关。更多还原

【Abstract】 The authors of this paper conduct a shaking-table test about a non-ductile RC frame with scaling 1∶ 2 under mainshock-aftershock seismic sequences,and analyze the failure modes,dynamic characteristics and displacement response of the model. The input mainshock-aftershock seismic sequences are three groups of real ground motions,and the loading scheme includes uniaxial and biaxial loading. The test shows that most of the damage to the joint of beams,columns and nodes; the 1st vibration period is increased because of the accumulation of structural damage with the increase of mainshock-aftershock seismic sequences’ amplitude; the damage to the model and the frequency characteristic of the real mainshock-aftershock seismic sequences are closely interconnected.更多还原