斜交铁路箱涵结构受力性能研究  

Mechanical Performance Study of Skewed Railway Box Culvert Structure

作　　者：汤旻雨 TANG Minyu(China Railway Eryuan Engineering Group Co.Ltd.,Chengdu Sichuan 610036,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610036

出　　处：《铁道建筑技术》2024年第8期31-34,54,共5页Railway Construction Technology

基　　金：中铁二院工程集团有限责任公司科研项目分项目(R5KSNQ194048KSNQ194048)。

摘　　要：为探讨铁路箱涵结构在不同斜交角度下的受力性能及内力分布规律,以某斜交铁路箱涵为工程背景,利用有限元软件分别建立7个不同斜交角度的箱涵模型,计算各斜交角状态下箱涵结构中腹板顶、顶板钝角端、顶板锐角端等关键部位的最大负弯矩,以分析其随斜交角度的变化规律。结果表明:(1)正交以及斜交角度较小时,箱涵所受最大负弯矩出现在中腹板顶部顶板位置;当斜交角进一步增大,箱涵整体所受最大负弯矩开始转移至钝角端。(2)箱涵顶板钝角端所受最大负弯矩随斜交角度增加呈非线性增长趋势。(3)中腹板顶部所受最大负弯矩随斜交角的增加有一定程度的增加,但整体增幅不大。(4)顶板所受最大剪力分布及变化规律与最大弯矩值相似。In order to study the mechanical performance and internal force distribution of railway box culvert structure under different oblique angles,7 box culvert models with different oblique angles were established by using finite element software based on an oblique railway box culvert,and the maximum negative bending moments of key parts such as the top of central web,obtuse and acute angle of top slab under different oblique angles were calculated,so as to analyze the variation law with the oblique angle.The results show that:(1)when the orthogonal situation or oblique angle is small,the maximum negative bending moment of the box culvert is at the top slab of the central web.When the oblique angle is further increased,the maximum negative bending moment of the box culvert begins to shift to the obtuse end of the top slab.(2)The maximum negative bending moment at the obtuse end of top slab shows a nonlinear increasing trend with the increase of the oblique angle.(3)The maximum negative bending moment at the top of the central web increases to a certain extent with the increase of the oblique angle,but the overall increase is small.(4)The arrangement and variation law of the maximum shear force on the top slab is similar to that of the maximum negative bending moment.

关 键 词：斜交箱涵 受力性能 板单元模型 数值计算 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.213[交通运输工程—道路与铁道工程]