刚构桥高温条件下边跨和中跨同时合龙可行性研究

Study of Rigid Frame Bridge's Side Span and Middle Span at the Same Time Closure Feasibility under the Condition of High Temperature

以一座预应力混凝土连续刚构桥为工程背景,采用有限元软件桥梁博士建立模型,通过利用顶推力施加后墩顶位移比较和在最不利工况下应力变化的方法,证明了高温条件下合龙的可行性;通过边跨、中跨同时合龙阶段及正常使用阶段验算,证明了边、中跨同时合龙的可行性。

In the engineering background of prestressed concrete continuous rigid frame bridge,building model with the finite element software bridge,Bridge Doctor,the method that the displacement of top pier after pushing force exerted are compared with the most unfavorable conditions of stress change,proves closure feasibility under the condition of high temperature;the side span and middle span at the same time closure stage checking and the normal use stage checking proves side span and middle span at the same time closure feasibility.