科技创新与应用2025，Vol.15Issue(18)：37-40,4.DOI:10.19981/j.CN23-1581/G3.2025.18.008
下穿铁路桥涵框架混凝土施工过程中结构对混凝土温度场与应力场的影响研究
摘要
Abstract
In this paper,the influence of the structure on the temperature field and stress field of the concrete during the construction of under-crossing railway bridges and culverts,combined with numerical simulation,the structure shows that the concrete material is a durable material,but it is essentially a non-uniform porous material.For different construction environments,appropriate concrete materials should be selected to make better use of the concrete properties and control the occurrence of cracks;when considering structural cracks,the greater the temperature difference,the greater the thermal stress.During the construction of frame box culverts,special attention should be paid to the corners and corner points on both sides along the horizontal direction on the concrete floor,which is the main position of the maximum tensile stress;when carrying out stress analysis on the diagonal frame system,the temperature stress analysis at different angles is mainly carried out by converting the oblique intersection to the forward intersection.It can be known through numerical simulation,it is concluded that the larger the diagonal angle,the higher the temperature at the center of the wall,which leads to greater temperature stress and lower the crack suppression effect.关键词
框架桥/裂缝/数值模拟/混凝土/温度场/应力场Key words
frame bridge/crack/numerical simulation/concrete/temperature field/stress field分类
交通运输引用本文复制引用
谭佳瑶,郭兵文,魏世龙,吴亚平,于天佑..下穿铁路桥涵框架混凝土施工过程中结构对混凝土温度场与应力场的影响研究[J].科技创新与应用,2025,15(18):37-40,4.基金项目
甘肃省级大学生创新创业训练计划项目(S202416209009) （S202416209009）
兰州石化职业技术大学科研项目(2023KY-11) （2023KY-11）
兰州石化职业技术大学建筑结构抗震新方法新技术科研创新团队(无编号) （无编号）
