交通荷载作用下考虑软土软化效应的电力排管动力响应分析  

Dynamic Response Analysis of Electrical Conduit under Traffic Load Considering the Softening Effect of Soft Soil

作　　者：张斌 刘旻 刘飞禹[2] ZHANG Bin;LIU Min;LIU Fei-yu(State Grid Shanghai Economic Research Institute,Shanghai 200233,China;School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)

机构地区：[1]国家电网上海经研院,上海200233 [2]上海大学力学与工程科学学院,上海200444

出　　处：《科学技术与工程》2025年第8期3391-3399,共9页Science Technology and Engineering

基　　金：国家自然科学基金(52378355)。

摘　　要：为了研究交通荷载作用下考虑软土软化效应的电力排管变形机理,基于动弹性模量衰减模型,编写USDFLD子程序,并将该子程序导入ABAQUS软件中,建立软土地基中埋置电力排管的三维有限元模型,采用有限元方法对地下电力排管在交通荷载作用下的动力响应进行分析,研究不同交通荷载大小(满载50%、满载100%、超载200%、超载300%)、埋置深度(800、850、900、950 mm)对电力排管力学特性的影响。结果表明:软土的软化效应对电力排管在受交通荷载作用下的动力响应有显著影响;随着交通荷载大小的增加,电力排管的沉降逐渐增大,排管底部的应变从对称分布转向不对称分布,应变集中区域增加;增大电力排管的埋深可以显著降低交通荷载对排管的影响,当埋置深度从800 mm增加至950 mm,竖向位移减小39%。研究成果为软土地区的电力排管设计和施工提供科学依据,帮助优化排管埋置深度和应对不同交通荷载的影响。To investigate the deformation mechanism of underground electrical conduits in soft soil considering the softening effect under traffic loads,a USDFLD subroutine was developed based on the dynamic modulus attenuation model.This subroutine was imported into ABAQUS software to establish a three-dimensional finite element model of electrical conduits buried in soft soil foundations.The finite element method was used to analyze the dynamic response of underground electrical conduits under traffic loads.The effects of different traffic load magnitudes(50%full load,100%full load,200%overload,300%overload)and burial depths(800,850,900,950 mm)on the mechanical properties of electrical conduits were studied.The results show that the softening effect of soft soil has a significant impact on the dynamic response of electrical conduits under traffic loads.As the traffic load magnitude increases,the settlement of the electrical conduit gradually increases,and the strain at the bottom of the conduit shifts from symmetric to asymmetric distribution,with an increase in the strain concentration area.Increasing the burial depth of the electrical conduit can significantly reduce the impact of traffic loads on the conduit.When the burial depth increases from 800 mm to 950 mm,the vertical displacement decreases by 39%.The research results provide a scientific basis for the design and construction of power pipes in soft soil areas,and help optimize the depth of pipe embedding and cope with the influence of different traffic loads.

关 键 词：交通荷载 软化效应 电力排管 有限元分析 

分 类 号：TU994[建筑科学—市政工程]