连续刚构桥底板防崩裂设计研究

STUDY ON ANTI-CRACKING DESIGN OF SLAB OF CONTINUOUS RIGID FRAME BRIDGE

连续刚构桥是国内外应用较为广泛的桥型,但该桥型大多会发生底板崩裂病害,严重影响其运营安全和使用寿命。文章以云南某桥为实例,通过有限元软件建模计算,分析了该桥底板崩裂的原因,发现抗崩钢筋设计以及波纹管施工定位误差是该桥发生崩裂病害的重要原因,其中抗崩钢筋可以采用不对称设计,希望对类似工程提供参考。

Continuous rigid frame is a relatively wide bridge the bridge type will have the collapse of the floor which seriously ice life. In this paper, a bridge in Yunnan Province as an exampl type at home and abroad, but most of affected its operational safety and serve, the causes of floor cracking are analyzed through the finite element software modeling calculation. The results show that the design of anti - collapse steel bars and the positioning errors of bellows construction are the important causes of cracking diseases in this bridge, and the anti -collapse steel bars can be designed asymmetrically, so as to provide reference for similar projects.