Study on dynamic response of reinforced soil flexible abutment

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Dec.2025, Vol.48 No.12: 1722-1728

DOI: 10.3969/j.issn.1003-5060.2025.12.020

Authors

XU Qian $ ^{1} $, ZHU Yalin $ ^{1,2} $, ZHAN Zijian $ ^{1} $, GAO Yankei $ ^{1} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China)

Abstract and Keywords

Abstract: In order to further study the stress and deformation characteristics of reinforced soil flexible abutment under earthquake action, a numerical calculation model is established based on an engineering example. The applicability of the model has been verified by comparing the simulation results of the abutment with the field-measured data. Applying a Kobe wave as the power input, the effects of the abutment foundation offset distance D and the ratio of abutment wall to lower panel $ H_{F}/H_{L} $ on the dynamic response of the reinforced abutment were investigated. The results indicate that variables D and $ H_{F}/H_{L} $ have significant effects on the horizontal displacement within the height range of the abutment wall. The increasing rate of the horizontal displacement at the top of the abutment is positively connected with the amplitude of the seismic wave acceleration. The horizontal earth pressure and earth pressure coefficient grow as D and $ H_{F}/H_{L} $ increase. Increasing D or $ H_{F}/H_{L} $ can effectively diminish the stress value of the reinforcement. The stress of the reinforcing strip exhibits an S-shaped distribution along the vertical direction and a single peak distribution along the horizontal direction. The connection between horizontal displacement and reinforcement position can be well described using the fitting formula.

Keywords: reinforced soil; flexible abutment; dynamic response; numerical simulation; parameter analysis

作者信息

许倩 $ ^{1} $，朱亚林 $ ^{1,2} $，占子建 $ ^{1} $，高延科 $ ^{1} $

(1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 土木工程结构与材料安徽省重点实验室，安徽合肥 230009)

摘要和关键词

摘要: 为进一步研究加筋土柔性桥台在地震作用下的受力与变形特征,文章以某工程实例为背景建立数值计算模型,通过将桥台的模拟结果与现场实测数据进行对比,验证所建模型的适用性。以Kobe波作为动力输入,分析桥台基础偏移距离D和桥台墙与下级面板比值 $ H_{F}/H_{L} $对加筋桥台动力响应的影响。结果表明:D和 $ H_{F}/H_{L} $对桥台墙高度范围内的水平位移影响较大;桥台顶部水平位移的增加速度与所施加的地震波加速度幅值正相关;水平土压力和土压力系数随着D和 $ H_{F}/H_{L} $的增加而增加;增加D或 $ H_{F}/H_{L} $可有效减小筋材应力值;筋带应力沿竖向方向呈现“S”型的分布特点,筋带应力沿水平方向呈单峰值分布;拟合公式能够较好地描述水平位移与筋材位置的关系。

关键词: 加筋土；柔性桥台；动力响应；数值模拟；参数分析

Funding

国家自然科学基金资助项目（42077249）；合肥工业大学大学生创新创业训练计划资助项目（X202310359210）

合肥工业大学学报(自然科学版)

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