大跨径预应力混凝土连续刚构桥长期下挠控制初探

目前大跨径预应力混凝土连续刚构桥在公路建设中有着广泛的应用，但其长期下挠以及下挠量过大已成为该桥型的世界性通病。该文以浙江某跨海连续刚构桥为背景，主要以控制长期挠度为目标，通过改善上部结构内力状态，控制梁体成桥后长期变形趋势，从本质上研究解决该桥长期挠度问题的方案。

Preliminary Probing into Long-term Down-deflecting Control of Large-span Pre-stressed Concrete Continuous Rigid Frame Bridge

The large-span pre-stressed concrete continuous rigid frame bridge is now widely applied in the highway construction.But the long-term down-defleeting and overlarge down-deflection have become the common fault of this bridge in the world.Taking a crossing-sea continuous rigid frame bridge in Zbejiang as the background,mainly taking the control of long-term deflection as the objective and through improving the internal force status of the superstructure,the article introduces the control of long-term deforma...