摘要
为了揭示三种大跨径钢波纹管涵洞力学特性的差异,通过有限元方法对不同工况下大跨径钢波纹管圆涵、拱涵和箱涵三种结构的力学特性进行比较,分析其变形特征、涵顶垂直土压力、涵侧土压力及结构安全性等方面的表现。结果表明:三种结构在受力变形特征的分布上差异不显著,但在应力与水平变形的最不利点位置上有所不同,涵顶垂直土压力均呈现中间小,两侧大分布,随填土高度增加,涵顶中心和涵侧竖向土压力均增大且趋势相同,涵侧土压力分布各有特点,但三者波峰与波谷位置的分布规律相似。箱涵等效应力初期较大,增长速度较快,易于达到屈服应力,而拱涵和圆涵之间则没有太大差距。在水平位移增幅方面,三者差距较小,而竖向位移增幅表现为箱涵大于圆涵,也大于拱涵。
There are fewer systematic studies on the mechanical properties of large-span corrugated steel pipe culverts.To achieve this goal,this work employs the finite element method to comparatively analyze the mechanical behavior of three large-span steel culvert structures:circular culverts,arch culverts,and box culverts,under varying working conditions.The analysis focuses on deformation characteristics,vertical earth pressure on the culvert crown,lateral earth pressure,and the structural safety of the culverts.The results are as follows.Three kinds of structures in the distribution of force and deformation characteristics are not too different,just in the stress and horizontal deformation of the most unfavorable point location;culvert top vertical earth pressure are presented in the middle of small,two sides of the large distribution;with the increase of filling height,culvert top center and culvert side vertical earth pressure are increased and the trend is the same;culvert side earth pressure distribution has its own characteristics,but the three wave peak,wave valley culvert side earth pressure distribution is similar.Box culvert equivalent stress is larger at the beginning,the growth rate is faster,and it is easiest to reach the yield stress,while there is no big gap between arch culvert and round culvert.In terms of horizontal displacement,the differences among the three structures are minimal.However,the vertical displacement shows a clear hierarchy:the box culvert exhibits the largest increase,followed by the circular culvert,and then the arch culvert.
作者
沈斌斌
SHEN Binbin(Fujian Communications Planning and Design Institute Co.,Ltd.,Fuzhou,Fujian 350000,China)
出处
《水利与建筑工程学报》
2025年第1期109-117,共9页
Journal of Water Resources and Architectural Engineering
基金
福建省自然科学基金(2022J05021)。
关键词
大跨径
钢波纹管涵洞
数值模拟
垂直土压力理论
large span
steel corrugated pipe culvert
numerical simulation
vertical earth pressure theory
作者简介
沈斌斌(1984-),男,硕士,高级工程师,主要从事路基、路面、涵洞设计等方面工作。E-mail:44529941@qq.com。
