摘要
基于ABAQUS有限元分析软件,建立了不同结构层厚度下有轨电车道床板三维有限元模型,分析板中、板端荷载作用下整体道床板底水平拉应力、板顶弯沉、土基顶面压应力,以及弯沉随不同道床板厚度、支撑板厚度的力学响应规律。研究结果表明:在板中荷载作用下,道床板表面呈“盆地状”下压,其弯沉值随着道床板厚度的增大而减小,板底水平拉应力随着道床板厚度的增大而减小,土基顶面的压应力可达14.020 kPa,路基顶面弯沉约为1.543 mm;在板端荷载作用下,受荷道床板拉应力随着道床板厚度的增加逐渐减小;未受荷道床板的板顶弯沉和土基顶面压应力及弯沉等力学响应参数,随着离接缝距离的增大而递减。因此,20 cm的道床板,12 cm的支撑层更有利于有轨电车的安全与质量保障。
Based on finite element analysis software,the paper establishes the three-dimensional finite element model under different structural layer thickness.Its goal is to analyze the mechanical response laws of the horizontal tensile stress at the bottom of the monolithic track bed,the deflection at the top of the slab,the compressive stress and deflection at the top of the soil foundation with different thickness of the track bed slab and the thickness of the support slab under the load at the middle and end of the slab.Research shows that:The surface of the track bed slab is pressed down in a"basin shape",its deflection and horizontal tensile stress at the bottom of the plate decrease with the increase of thickness.The compressive stress on the top surface of the soil foundation can reach 14.020 kPa,and the deflection of the top surface of the subgrade is about 1.543 mm under the load of the slab.The tensile stress of the loaded bed plate decreases with the increase of the thickness.As the distance from the joint increases,the mechanical response parameters such as the top bending of the unloaded track bed plate and the compressive stress and bending of the top surface of the soil foundation decrease.Therefore,20 cm track bed plate and 12 cm support layer are more conducive to the safety and quality assurance of the tram.
作者
黄崇伟
朱美宣
孙瑜
李巍逍
HAUNG Chongwei;ZHU Meixuan;SUN Yu;LI Weixiao(Department of Transportation Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《智能计算机与应用》
2023年第4期104-110,共7页
Intelligent Computer and Applications
基金
上海市青年科技英才扬帆计划资助项目(20YF1431900)。
关键词
有轨电车
整体道床
有限元
结构层厚度
力学响应分析
tram
monolithic track bed
finite element model
structural layer thickness
mechanical analysis
