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为了研究纤维增强复合材料(FRP)约束钢筋混凝土(RC)空心截面桥墩的抗震性能,对水平单向和双向荷载作用下,剪跨比分别为4和8的CFRP约束RC矩形空心墩进行拟静力试验。分析不同试件的破坏形态、滞回曲线、水平力和位移延性。结果表明:通过CFRP布环包约束试验空心墩的塑性铰区,可降低墩柱的破坏位置、减轻损伤程度,并改变剪跨比较小墩柱的破坏形态;明显改善水平双向荷载作用下剪跨比较大矩形空心墩的滞回性能和延性,但是对水平力的提高小于20%。
In order to study the seismic behavior of reinforced concrete (RC) hollow section RC piers with fiber reinforced composites (FRP), the CFRP-constrained RC rectangular hollow piers with shear span ratios of 4 and 8 under horizontal unidirectional and bidirectional loadings Force test. The damage morphology, hysteresis curve, horizontal force and displacement ductility of different specimens were analyzed. The results show that the plastic hinge area of the hollow piers with CFRP cloth bundling restraint test can reduce the damage position of the pier and the damage degree, and change the failure mode of the small pier with the shear span. It can obviously improve the shear span of the pier under the horizontal bidirectional load The hysteretic behavior and ductility of large rectangular hollow piers are improved, but the horizontal force is less than 20%.