循环交通荷载作用下低填方刚性涵洞的动力响应研究  

Study on Dynamic Response of Low Fill Rigid Culvert Under Cyclic Traffic Load

作　　者：焦俊杰 解豪 Jiao Junjie;Xie Hao(Shaanxi Provincial Institute of Water Resources and Electric Power Investigation and Design,Xi'an 710000,Shaanxi)

机构地区：[1]陕西省水利电力勘测设计研究院,陕西西安710000

出　　处：《陕西水利》2024年第8期18-20,24,共4页Shaanxi Water Resources

摘　　要：通过建立交通荷载作用下涵-土之间的耦合分析模型来研究涵洞在循环交通荷载作用下的动应力和动位移变化规律,分析不同参数对涵洞动态响应的影响。结果表明:(1)涵顶最大竖向位移和永久竖向位移随循环加载次数的增加而增大,并在加载到一定次数时趋于稳定;(2)轴载越大,涵顶竖向位移和变形越大,竖向位移达到稳定所需要的时间也越长;(3)车速(加载时间)对涵洞位移和变形影响最大情况并不是车速最大或加载时间最长;(4)涵顶附加最大竖向位移和涵洞截面附加最大竖向变形随埋深增加而减小;(5)路基土模量越小,涵洞整体竖向位移越大,但对涵洞截面变形影响越小。By establishing the coupling analysis model between culvert and soil under traffic load,the variation law of dynamic stress and dynamic displacement of culvert under cyclic traffic load is studied,and the influence of different parameters on the dynamic response of culvert is analyzed.The results show that:(1)The maximum vertical displacement and permanent vertical displacement of culvert top increase with the increase of cyclic loading times,and tend to be stable when loading to a certain number of times;(2)The greater the axial load,the greater the vertical displacement and deformation of the culvert top,and the longer the time required for the vertical displacement to reach stability;(3)The maximum influence of the speed(loading time)on the displacement and deformation of the culvert is not the maximum speed or the longest loading time;(4)The maximum additional vertical displacement of culvert top and the maximum additional vertical deformation of culvert section decrease with the increase of buried depth.(5)The smaller the modulus of subgrade soil,the greater the overall vertical displacement of culvert,but the smaller the influence on the deformation of culvert section.

关 键 词：交通荷载 低填方 刚性涵洞 动力响应 

分 类 号：U449.8[建筑科学—桥梁与隧道工程]