【摘要】 本文通过两榀预压装配式预应力混凝土框架梁柱组合体在低周反复荷载下的试验,了解其梁端截面应变分布、破 坏机理和极限承载能力;探讨了全预应力配筋截面延性特征、滞回性能、耗能能力和变形恢复能力。试验表明,反向加载时 存在掀起效应,正截面受弯承载力应予以折减,梁端剪力摩擦作用能够抵抗梁端剪力。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;预应力的作用使得试件有很强的变形恢复 能力,有利于震后修复。更多还原

【Abstract】 Tow speciments of prestressed fabricated beam-column subassembly were tested under cyclic loading. Experimental studies were carried out to investigate the strain distribution at sections of beam ends, failure mechanism and ultimate load-bearing capacity on the beam-column connections, as well as ductility, hysteresis curves, energy dissipation, displacement restoring capacity of full PC specimens. The results of test showed that lift effect under reversed loading would reduce the load-bearing capacity, and the shear friction can be provided by normal concrete compression force to transfer the shear at beam ends. The analysis indicated that hysteresis curves and energy dissipation of specimens are good at high loading, and the inelastic rotation can be occurred at beam ends for moment redistribution. The prestressed fabricated connection has enough displacement restoring capacity, which reduces the frame damage in earthquake and can be repaired conveniently.更多还原