【摘要】 为了评价FRP约束RC空心墩的抗震性能,设计并制作了5个未约束和FRP约束矩形空心墩,并进行了恒轴压、水平单向低周反复荷载下的拟静力试验。通过对比分析了不同试验墩的滞回曲线、水平力和延性、总耗能和耗散系数。结果表明:FRP约束矩形空心墩的塑性铰区,可提高其抗侧刚度、改善其耗能能力和延性、提高其变形能力,且空心墩的抗震滞回耗能能力较稳定,但是,对水平力的影响较小。此外,耗散系数与总耗能的变化趋势不同,因此,评价RC空心墩耗能能力时,应综合考虑总耗能和耗散系数。更多还原

【Abstract】 In order to estimate the anti-seismic performance of FRP-confined RC bridge pier with hollow section,five unconfined and confined bridge piers with rectangular hollow section were designed and established.And then quasi-static experiment was carried out under constant axial compression and unidirectional horizontal reversal load.Comparing hysteretic curves,lateral force and ductility as well as energy dissipation of different specimen piers,it is shown that through confining plastic hinge region of the tested bridge pier by FRP,lateral rigidity and ultimate displacement are increased;energy dissipation and ductility are improved.However,it has more considerable effective ductility than load capacity.Besides,variation trend of dissipation coefficient is different with total energy dissipation.Therefore,dissipation energy coefficient and total energy dissipation should be considered at the same time to estimate energy dissipation ability of RC hollow section bridge pier.更多还原