【摘要】 非埋式路基桩板结构是高速铁路无砟轨道路基的一种新型结构,此类钢筋混凝土结构属温度敏感结构,温度作用分析是迫切需要而尚未完全得以解决的问题。基于变形协调条件,同时考虑桩-土共同作用特性和钢筋混凝土桩列所具有不同的弹塑性性质,建立桩板结构的二维等效框架结构计算模型,然后推导出温度效应的计算公式;结合遂渝线桩板结构模型,利用此理论和有限元软件对桩板结构进行计算比较分析。结果表明,理论计算结果与有限元计算结果吻合良好,验证了该方法的正确性和可行性。更多还原

【Abstract】 Non-embedded pile-board structure for subgrade,a new structure for subgrade of ballastless track of high-speed railway,is of reinforced concrete and temperature sensitive,and temperature action analysis is the urgent need but not completely solved.Based on compatibility of deformation,pile-board joint action feature and reinforced concrete pile row’s different characteristics of elastic-plasticity,the model for calculation of two-dimensional frame structure equivalent to pile-board structure is established,and then the formula for calculation of temperature effect is deduced.Combined with the model of pile-board structure for Suining-Chongqing Railway,this structure is calculated and analyzed by use of this theory and FEM software.The result shows good agreement between the calculated results by theory and FEM,which verifies the validity and feasibility of this method.更多还原