跨径13 m钢波纹板拱桥应变分析

Strain analysis of 13 m long span steel corrugated sheet arch bridge

依托海满一级公路双孔13 m跨径钢波纹板拱桥(动物通道),通过测试施工过程中钢波纹板拱桥内壁波峰、波谷和波侧处的切向和轴向应变,得出了不同填土高度下的应变变化规律。通过研究得到结论:波峰切向位置整体为压应变,而轴向位置拉压应变同时存在,且跨中位置的压应变趋势变化较大;波谷切向应变随着填土高度增加而增大,轴向位置拉压应变交替变化。钢波纹板桥梁轴向受力为切向受力的有力补充,有利于钢波纹板结构的整体安全稳定。钢波纹板拱桥建成的动物通道,减少了砂石开采对环境的破坏,利于环保,且方便动物通行,有利于人与自然和谐相处。

Based on the double-hole 13 m span steel corrugated plate arch bridge(animal passage)of Haiman first-class highway,the tangential and axial strain of the inner wall crest,trough and wave side of the steel corrugated plate arch bridge in the construction process were tested on site,and the strain variation rules under different filling heights were obtained.The conclusions are as follows:the tangential position of the crest is the compressive strain on the whole,while the axial tension strain exists at the same time,and the compressive strain trend of the mid-span position varies greatly.The tangential strain of trough increases with the increase of filling height and the axial tension strain changes alternately.The axial force of steel corrugated plate bridge is a strong complement to the tangential force,which is beneficial to the overall safety and stability of steel corrugated plate structure.The animal channel built by the steel corrugated sheet arch bridge reduces the damage to the environment caused by sand and gravel mining,which is beneficial to environmental protection,convenient for animals to pass through,and conducive to the harmony between man and nature.