循环交通荷载作用下低填方刚性涵洞的动力响应研究OA

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.