【摘要】：通過6個縮尺為1∶5的高速鐵路圓端形橋墩模型的低周反復加載試驗,研究剪跨比、配筋率和配箍率等參數(shù)對橋墩抗震性能的影響規(guī)律。結(jié)果表明,在低周反復荷載和軸壓荷載的共同作用下,低剪跨比和高剪跨比下高鐵橋墩模型的破壞模式分別為彎剪型破壞和彎曲型破壞;隨著配筋率、配箍率和剪跨比的提高,橋墩模型的位移延性和累積滯回耗能提高;試驗測得剪跨比為2.5時橋墩模型的位移延性系數(shù)為4.66~4.93,僅能滿足現(xiàn)行鐵路工程抗震設(shè)計規(guī)范的最低要求;配筋率和配箍率對橋墩模型的剛度退化效應和殘余位移影響較小。
[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，

本文編號：2497979