板厚与波高对波纹钢管涵受力性能影响分析

Research on Effect of Plate Thickness and Wave Height on Mechanical Properties of Corrugated Steel Pipe Culvert

根据《公路桥涵用波形钢板》(JT/T 710—2008)中的F波型建立波形钢管涵有限元模型,分析波纹钢管涵的受力性能,对比分析了板厚和波高2个参数对波纹钢板涵受力性能的影响。计算分析结果表明,随着板厚和波高的下降,波形钢管涵的变形和应力逐渐增大,且增长幅度逐渐增加;波纹钢管涵在波峰截面的水平位移由顶点到最低点呈现3次先增大后减小的变化趋势,在波谷截面的水平位移由顶点到最低点呈现1次先增大后减小的变化趋势,均在1/2点达到最大值;波纹钢管涵的竖向位移由顶点到最低点呈现逐渐减小的变化趋势,在顶点达到最大值;相邻波峰截面和波谷截面的应力变化趋势存在明显不同,波峰截面的应力最小值出现在1/2点及其附近,而波谷截面在1/2点附近有接近于应力最大值的较大值。

The finite element model of corrugated steel tube culvert was established according to the F wave shape in“Corrugated Steel Plate for Highway Bridge and Culvert”(JT/T 710—2008),and the mechanical performance of corrugated steel plate culverts were analyzed.At the same time,the effects of plate thickness and wave height on the mechanical properties of corrugated steel culverts were compared and analyzed.Through calculation and analysis,the results show that as the plate thickness and wave height decrease,the deformation and stress of the corrugated steel pipe culvert gradually increase,and the growth rate gradually increases.The horizontal displacement of the corrugated steel pipe culvert in the wave crest section shows a three-time increase and then decreases from the apex to the lowest point.The horizontal displacement of the wave trough section shows a first increase and then a decrease from the apex to the lowest point.Both reaching a maximum at 1/2 point.The vertical displacement of the corrugated steel pipe culvert shows a decreasing trend from the highest point to the lowest one,and reaches a maximum at the highest point.The stress variation trends of adjacent wave crest sections and wave trough sections are obviously different.The minimum stress value of wave crest sections appears at 1/2 point and its vicinity,while the wave trough section has a larger value close to the maximum stress value near the 1/2 point.