矮墩连续刚构桥设计要点分析

Analysis on the Design Essentials of Short-pier Continuous Rigid Frame Bridge

矮墩连续刚构桥下部结构设计对整个刚构桥使用性能有着直接影响。依托工程实例,文章重点对矮墩连续刚构桥设计进行探讨,分析混凝土收缩、徐变、温度,预应力次内力、桥墩不均匀沉降等对墩梁固结体系结构的影响,提出桩土效应模拟的必要性。总结了矮墩刚构桥设计的制约因素以及该类桥梁设计注意事项,为该类桥型的发展积累了设计经验。

It is directly related to the performance of the rigid frame bridge with regard to the substructure design.According to engineering examples,the short pier continuous rigid frame bridge is discussed,simultaneously the Influence of concrete shrinkage and creep,temperature force,prestressed secondary internal force,uneven settlement of piers on the cnsolidation system of pier-girder fixed joint is analyzed.The necessity of pile-soil effect simulation is put forward..The constraints of the design of the short pier rigid frame bridge and the considerations for the design of the bridge are summarized,and ccumulated design experience for the development of this type of bridge.