高路堤大管径钢波纹管变形特性研究
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摘要
为研究高路堤大管径钢波纹管的变形特性,采用环向抗弯刚度等效的方法,运用有限元软件ABAQUS模拟不同填土高度下不同管径钢波纹管的整体变形情况。结果表明:钢波纹管各横断面变形量随着断面与管口距离增大先呈线性增大变化,管径越大,变化速率越大,最后趋近于水平变化,水平变化段起始位置大致位于路肩处;当填土高度一定时,钢波纹管最大竖向变形量和最大水平向变形量受整体变形的影响而增大的部分约为6%,不会随着管径的增大而产生明显的变化。当管径一定时,钢波纹管最大竖向和最大水平向变形量与填土高度成正比例关系,钢波纹管最大竖向变形量和最大水平向变形量受整体变形的影响随着填土高度的增加而增大。
For the study of the deformation characteristics of the highway steel corrugated pipe under the conditions of high embankment and large diameter,the hoop bending stiffness equivalent method was used to simulate the overall deformation of steel corrugated pipe under different filling heights and different diameters. Results showed that each cross-section deformation of the steel corrugated pipe increased linearly with the distance between the section and orificium firstly,and the larger diameter,the greater variation rate; and tended to level changes finally,and the level section starts roughly on the shoulder.The increase part of the maximum vertical and horizontal deformation affected by the overall deformation was about 6%,which would not change obviously with the increase of the diameter.Under the same diameter,the corrugated steel pipe vertical and horizontal deformation was directly proportion to the filling height and affected more obviously with the filling height increasing.
For the study of the deformation characteristics of the highway steel corrugated pipe under the conditions of high embankment and large diameter,the hoop bending stiffness equivalent method was used to simulate the overall deformation of steel corrugated pipe under different filling heights and different diameters. Results showed that each cross-section deformation of the steel corrugated pipe increased linearly with the distance between the section and orificium firstly,and the larger diameter,the greater variation rate; and tended to level changes finally,and the level section starts roughly on the shoulder.The increase part of the maximum vertical and horizontal deformation affected by the overall deformation was about 6%,which would not change obviously with the increase of the diameter.Under the same diameter,the corrugated steel pipe vertical and horizontal deformation was directly proportion to the filling height and affected more obviously with the filling height increasing.
引文
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[2]王永岗,戴诗亮,吕英民.波纹管在任意载荷作用下的几何非线性分析[J].清华大学学报(自然科学版),2002(2):220.
[3]季文玉.金属波纹管涵洞受力行为理论分析与试验研究[D].北京:北京交通大学,2004.
[4]符进,陈建兵,马君毅.金属波纹管涵力学性能数值模拟[J].公路,2008(9):310.
[5]乌延玲,冯忠居,王彦志,等.钢波纹管涵洞受力与变形特性现场试验分析[J].西安建筑科技大学学报(自然科学版),2011(4):513.
[6]李晓勇,梁养辉,李祝龙,等.低路堤荷载作用下钢波纹管涵切向应变现场测试[J].公路工程,2013(3):90.
[7]乌延玲.公路钢波纹管涵洞受力与变形特性及应用研究[D].西安:长安大学,2012.
[8]刘刚.高填方路堤下钢波纹管涵洞受力与变形特性研究[D].西安:长安大学,2012.
[9]EL-SAWY K M.Three-dimensional modeling of soil-steel culverts under the effect of truckloads[J].Thin-walled structures,2003,41(8):747.
[10]朱向荣,王金昌.ABAQUS软件中部分土模型简介及其工程应用[J].岩土力学,2004(增刊2):144.
[11]张鲁渝,郑颖人,赵尚毅,等.有限元强度折减系数法计算土坡稳定安全系数的精度研究[J].水利学报,2003(1):21.
[12]任艳荣,刘玉标,顾小芸.用ABAQUS软件处理管土相互作用中的接触面问题[J].力学与实践,2004,26(6):43.