铁道科学与工程学报2018，Vol.15Issue(3)：677-684,8.
城市轻轨槽型梁温度效应及裂缝分析
The groove beam of urban light rail temperature effect and fracture analysis
摘要
Abstract
By taking the light rail groove beam in zhengzhou city as an example, the effects of temperature effect and cracks causes on the mechanical properties of the groove beam were studied by using the finite element method. The calculation results show that the vertical temperature gradient, vertical displacement of the U-shaped beam longitudinal stress and transverse stress have relatively large impact force, and cannot be neglected in the design of the system; only groove beam deformation caused by the temperature stress does not. Lateral displacement and longitudinal displacement increase with temperature, and the deformation value grows linearly. Ordinary reinforcement can inhibit the development of cracks with nonlinear analysis not only considering the material nonlinear, but also establishing fine model of ordinary reinforcement. After prestressed steel bar is tensioned, cracks are mainly distributed at the anchorage end. During construction, within the scope of 1/8 of span, reinforcement measures are taken to avoid the prestressed tension cracks.关键词
城市轻轨/槽型梁/有限元模型/温度效应/裂缝分析Key words
urban light rail/groove beam/finite element model/temperature effects/fracture analysis分类
建筑与水利引用本文复制引用
梁岩,毛瑞敏,张文格,袁会丽,陈淮..城市轻轨槽型梁温度效应及裂缝分析[J].铁道科学与工程学报,2018,15(3):677-684,8.基金项目
国家自然科学基金资助项目(51608488) （51608488）
