低周反复荷载下高速铁路桥墩抗震试验研究
发布时间：2019-06-12 11:19
【摘要】：通过6个缩尺为1∶5的高速铁路圆端形桥墩模型的低周反复加载试验,研究剪跨比、配筋率和配箍率等参数对桥墩抗震性能的影响规律。结果表明,在低周反复荷载和轴压荷载的共同作用下,低剪跨比和高剪跨比下高铁桥墩模型的破坏模式分别为弯剪型破坏和弯曲型破坏;随着配筋率、配箍率和剪跨比的提高,桥墩模型的位移延性和累积滞回耗能提高;试验测得剪跨比为2.5时桥墩模型的位移延性系数为4.66~4.93,仅能满足现行铁路工程抗震设计规范的最低要求;配筋率和配箍率对桥墩模型的刚度退化效应和残余位移影响较小。
[Abstract]:The effects of shear span ratio, reinforcement ratio and hoop ratio on the seismic performance of high speed railway circular end piers with a scale of 1:5 are studied by means of low cycle repeated loading tests. The results show that under the combined action of low cyclic load and axial compression load, the failure modes of high speed railway pier model under low shear span ratio and high shear span ratio are bending shear failure and bending failure, respectively, and the displacement toughness and cumulative hysteretic energy consumption of pier model increase with the increase of reinforcement ratio, hoop ratio and shear span ratio. When the shear span ratio is 2.5, the displacement ductility coefficient of the pier model is 4.66 鈮，
本文编号：2497979
[Abstract]:The effects of shear span ratio, reinforcement ratio and hoop ratio on the seismic performance of high speed railway circular end piers with a scale of 1:5 are studied by means of low cycle repeated loading tests. The results show that under the combined action of low cyclic load and axial compression load, the failure modes of high speed railway pier model under low shear span ratio and high shear span ratio are bending shear failure and bending failure, respectively, and the displacement toughness and cumulative hysteretic energy consumption of pier model increase with the increase of reinforcement ratio, hoop ratio and shear span ratio. When the shear span ratio is 2.5, the displacement ductility coefficient of the pier model is 4.66 鈮，
本文编号：2497979
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