预应力混凝土连续梁预拱度研究

Study on Pre-camber of the Continuous Beam of the Prestressed Concrete

预应力混凝土连续梁广泛应用于桥梁建设中,桥梁施工和运营过程中都会产生向下的挠度,为使桥梁最终线形与设计线形一致,需要对桥梁线形进行合理控制,而桥梁线形控制主要通过对预拱度的合理设置来实现。通过对桥梁挠度的影响因素进行分析,得出各影响因素是合理设置预拱度的关键,为新建桥梁预拱度设置提供了可靠的参考依据。

The prestressed concrete continuous beam is widely used in bridge construction. There will be a downward deflection in the bridge construction and operation process and the bridge line should he reasonably controlled in order to identify the final bridge line with the design line. The line control of the bridge is achieved mainly through setting up reasonable degree of the pre-camber. This paper analyzes the influence factors of the deflection of hridge and finds out that the influence factors is the key to set up the pre-camber reasonably, which provides a reliable reference for the set of the pre-eamber of the new bridge.