桥面连续在林区桥梁中的应用

钢筋混凝土及预应力混凝土简支梁桥，在以往的设计中于梁端及梁端和桥台之间设置伸缩缝。由于伸缩缝容易损坏，所以是桥面系中的一个薄弱位置，往往影响桥梁的正常使用。本文从取消伸缩缝出发，介绍了几种新颖的桥面连续结构形式，在分析受力图式的基础上，叙述其计算方法和步骤，同时考虑林区桥梁的特点，对桥面连续的设置及支座的选用予以探讨。

THE APPLICATION OF CONTINUOUS DECK IN FOREST BRIDGE SUMMARY

In the past designs of simple beam bridges of reinforced concrete and presstressed concrete,expansion joints were set up between beam ends-beam ends and bridge abutments.Because the joints could be easily damaged so they were wenk parts of bridge deck and usually affected normal using of the structure of bridge.In this paper,a few novel structure forms of continuous deck are introduced from the point of conceiting expansion joints;their computing wags and procedures are elaborated on the base of the aralysis of forced diagram.At the same time,the choice of bearing pad and installation of continuous deck are discussed in accordance with the charactor of the forest bridges.