【摘要】 采用传统设计方法和新设计思路对支架法施工的多跨预应力混凝土连续刚构桥进行了分析比较,提出了在预应力混凝土连续刚构桥边墩承台顶部设置纵向活动支座与墩身底部连接来释放结构纵向约束,减少结构超静定次数,从而达到减少结构次内力、优化结构受力目的的先铰接后固接的设计思路,并阐述了施工可行性,提出了完善的施工方案。更多还原

【Abstract】 In this paper,the support construction method for multi-span prestressed concrete continuous rigid frame bridges was analyzed.The traditional design methods and a new design approach,"hinged connectionfixed connection"were compared.This method sets longitudinally movable supports and pier shaft bottom connections on the tops of abutments of prestressed concrete continuous rigid frame bridges to release structure vertical restraints and to reduce structural redundancy.Therefore,structural secondary forces were reduced and stress distribution was optimized.In addition,the construction feasibility was elaborated and a refined construction program was proposed in the paper.更多还原