复合材料科学与工程Issue(11)：92-99,8.DOI:10.19936/j.cnki.2096-8000.20241128.013
施工期FRPM管的变形率对管涵力学性能的影响研究
Study on the influence of constructing deformation rate on the mechanical properties of FRPM pipe culverts
摘要
Abstract
In order to explore the influence of cumulative deformation from the constructing shallow buried glass fiber reinforced plastics mortar(FRPM)pipe culverts on the carrying capacity during the service period,a numeri-cal calculation model of pipe-soil interaction for flexible FRPM culvert was established based on the field load test of the culvert in the subgrade filling constructing period.The effects of three different filling heights and three kinds of deformation rate on mechanical parameters such as circumferential strain,von Mises stress and earth pressure a-round pipe were studied through simulation.The results illustrate that the culvert has irregular ellipticity with the in-crease of the culvert deformation rate.Its stress mode changes from the circumferential overall uniform force to the more concentrating load on the upper part especially in the top area of the culvert.At the equivalent filling height,the circumferential strain,von Mises stress and earth pressure around pipe increase significantly with the increase of the deformation rate,and the greater the deformation rate,the more severe the adverse effect on the long-term me-chanical properties of the pipe culvert.Meanwhile,increasing the thickness of the fill reduces the burden on the cul-vert.During the constructing period,the culvert deformation rate can be significantly reduced by setting steel support device inside the culvert,which contributes to improving the stress bearing mode and durability of culverts in the course of the service period.关键词
FRPM管涵/变形率/施工期/管-土作用模型/力学性能/复合材料Key words
FRPM pipe culvert/deformation rate/constructing period/pipe-soil interaction model/mechani-cal property/composites分类
通用工业技术引用本文复制引用
王嘉诚,孙超,胡立周,贾莹洁,王清洲..施工期FRPM管的变形率对管涵力学性能的影响研究[J].复合材料科学与工程,2024,(11):92-99,8.基金项目
河北省交通运输厅科技项目(202315) （202315）
