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地震作用下加筋挡土墙筋带拉力计算研究

Calculation of bar tension in reinforced earth retaining wall under earthquake load

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【作者】 贾亮朱彦鹏来春景

【Author】 JIA Liang1,2,ZHU Yan-peng1,2,LAI Chun-jing1,2(1.College of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;2.Western Center of Disaster Mitigation in Civil Engineering,Ministry of Education,Lanzhou 730050,China)

【机构】 兰州理工大学土木工程学院西部土木工程防灾减灾教育部工程研究中心

【摘要】 基于地基剪切梁理论,研究了水平地震激励下条带式加筋挡土墙筋带的拉力响应。把加筋土看成宏观上均匀的复合材料,筋带当作土体增强材料,基于地基剪切梁理论得到墙后填土水平方向的动剪切应变;筋带和周围土体一起运动,筋带的运动受周围土体控制,其破坏取决于筋带所能承受变形的大小,因此将筋带简化为一维无质量弹性杆,则可得筋带轴向应变等于墙后填土水平方向的动剪切应变;通过胡克定律建立筋带动拉力方程,求解简谐地震作用下筋带的动拉力解析解。将提出的计算方法用于一工程实例,进行了筋带的拉力分析。用有限元软件ADINA进行了对比分析,验证提出计算方法的合理性,表明该计算方法安全、可靠。

【Abstract】 Based on the shear beam theory,the seismic response of bar tension in reinforced earth retaining wall under horizontal earthquake loads is investigated.In this study,the reinforced soil is regarded as macroscopically well-distributed composite material,and the reinforcement strip is regarded as reinforcing material.Based on the shear beam model,the shear strain of backfill soil under horizontal earthquake loads is obtained.The reinforcement strip moves with the soil body around,and the movement is simultaneously restricted by it.The destructive power of reinforcement strip depends on the size of its deformation,so the reinforcement strip can be simplified as one-dimensional elastic rod.In view of these assumptions,one can get the fact that the axial strain of reinforcement strip equals the horizontal shear strain of backfill soil.Furthermore,a dynamic tension equation is established by means of the Hooke’s law to analyze the dynamic tension of reinforcement strip under the harmonic earthquake loads.The proposed method is used to a practical application to conduct the seismic analysis.At last,the method is analyzed by using the finite element software(ADINA) to verify its rationality.The results of show that the proposed method is safe and reliable.

【基金】 国家自然科学基金项目(51108222);兰州理工大学博士科研基金项目;兰州理工大学红柳青年教师培养计划(Q201317)
  • 【文献出处】 岩土工程学报 ,Chinese Journal of Geotechnical Engineering , 编辑部邮箱 ,2013年S1期
  • 【分类号】TU476.4
  • 【被引频次】3
  • 【下载频次】251
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