土工合成材料加筋土桥台动力响应数值模拟分析  

Numerical Simulation of Dynamic Response of Geosynthetic Reinforced Soil Abutment

作　　者：张少秋 蔡晓光 李思汉[1,2,3,4] 徐洪路 李鑫鑫 ZHANG Shaoqiu;CAI Xiaoguang;LI Sihan;XU Honglu;LI Xinxin(College of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,China;Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment,Sanhe 065201,China;CEA Key Laboratory for Building Collapse Mechanism and Disaster Prevention,Sanhe 065201,China;Langfang City Key Laboratory of Research and Application of Geosynthetic Reinforced Soil Structure,Sanhe 065201,China;Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China)

机构地区：[1]防灾科技学院地质工程学院,河北三河065201 [2]河北省地震灾害防御与风险评价重点实验室,河北三河065201 [3]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [4]廊坊市加筋土结构研发与应用重点实验室,河北三河065201 [5]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《防灾科技学院学报》2023年第2期51-62,共12页Journal of Institute of Disaster Prevention

基　　金：防灾科技学院研究生创新基金项目(ZY20220311);中央高校基本科研业务费(ZY20215107)。

摘　　要：归纳了土工合成材料加筋土桥台数值模拟中筋材、土体的本构模型及相关参数,基于FLAC3D有限差分软件,开展土工合成材料加筋土桥台动力响应数值模拟并通过振动台模型试验验证,在此基础上,讨论加筋长度、附加荷载以及加筋与否对桥台前墙的峰值位移的影响。结果表明:延长筋材长度、减小附加荷载以及加筋可有效提高桥台的抗震性能,在不加筋时,不利于结构整体稳定,易发生倒塌。Firstly,the constitutive models for reinforcement and soil and their corresponding parameters in the numerical simulation of geosynthetic reinforced soil bridge abutment(GRSBA)were summarized.Secondly,the numerical simulation of the dynamic response of GRSBA is carried out based on FLAC3D finite difference software,and was verified by shaking table model test.On this basis,the influence of reinforcement length,additional load and reinforcement on the peak displacement of the abutment front wall is discussed.The numerical simulation results show that extending the length of the reinforcement,reducing the additional load,and the reinforcement can effectively improve the seismic performance of the abutment;while under unreinforced conditions,the abutment will suffer overall instability and be prone to collapse.

关 键 词：土工合成材料 加筋土柔性桥台 FLAC 参数取值 动力响应 水平位移 

分 类 号：U443.21[建筑科学—桥梁与隧道工程]