地震作用下高桩码头钢管桩塑性区及损伤特性研究

发布时间：2018-04-05 16:24

本文选题：钢管桩　切入点：高桩码头　出处：《水电能源科学》2017年05期

【摘要】：为研究地震峰值加速度和钢管桩径厚比对高桩码头钢管桩塑性区及损伤特性的影响规律,选取径厚比分别为64、82、100的三种钢管桩,采用p-y土弹簧模拟桩土相互作用,分析了三种钢管桩全直桩码头结构在不同地震峰值加速度下的动力时程,并根据桩身截面的最大应变判别其塑性区域及地震损伤水平。计算结果表明,钢管桩塑性区出现在桩顶和淤泥质粉质粘土层中,桩顶塑性区长度在0~2.09 m范围内,土内塑性区处于泥面以下3.2~8.7m的范围内。随着地震峰值加速度的增加,钢管桩塑性区长度和损伤程度呈上升趋势,在三种钢管桩中,径厚比为100的钢管桩塑性区长度和损伤程度相对较小。
[Abstract]:In order to study the influence of the peak acceleration of earthquake and the ratio of diameter to thickness of steel pipe pile on plastic zone and damage characteristics of steel pipe pile in high pile wharf, three kinds of steel pipe piles with diameter to thickness ratio of 64 ~ 82100 are selected, and the p-y soil spring is used to simulate the pile-soil interaction.The dynamic time history of three kinds of steel pipe pile full straight pile wharf structures under different seismic peak acceleration is analyzed, and the plastic region and seismic damage level are determined according to the maximum strain of the pile section.The results show that the plastic zone of steel pipe pile appears in the pile top and silt silty clay layer, the plastic zone of the pile top is in the range of 0 ~ 2.09 m, and the plastic zone in the soil is within the range of 3.2 ~ 8. 7 m below the mud surface.With the increase of seismic peak acceleration, the plastic zone length and damage degree of steel pipe pile increase. In three kinds of steel pipe pile, the plastic zone length and damage degree of steel pipe pile with ratio of diameter to thickness of 100 are relatively small.
【作者单位】：河海大学港口海岸与近海工程学院;中交第四航务工程勘察设计院有限公司;
【基金】：江苏省基础研究计划(自然科学基金)(BK20151498)
【分类号】：TV314

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