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通过对一榀两层两跨预压装配式混凝土框架拟动力试验,着重分析预压装配式混凝土框架在拟动力荷载情况下的破坏机制、刚度退化、耗能性能,以及变形恢复能力,并对结构模型进行了弹塑性动力分析。试验结构在高荷载下梁的滞回曲线趋于丰满,表现出较强的耗能能力。梁端截面具有良好的转动能力,可考虑框架弯矩调幅。预应力的作用使得框架构件有很强的变形恢复能力,有利于震后修复。
Through the pseudo-two-span two-span prestressed concrete prestressed concrete frame pseudo-dynamic test, stress analysis of prestressed concrete frame under pseudo-dynamic load failure mechanism, stiffness degradation, energy performance, and deformation recovery capabilities, and Structural model was elasto-plastic dynamic analysis. Under high load, the hysteretic curve of the test structure tends to be full, showing a strong energy dissipation capacity. Beam end section has a good ability to rotate, frame bending moment can be considered amplitude modulation. The role of prestressed makes the frame member has a strong ability to recover deformation, is conducive to post-earthquake repair.