摘要
假定软土地区沉管隧道地基土为三参数Kerr模型,同时沉管隧道管节等效为Timoshenko梁,采用竖向弹簧及旋转弹簧模拟管节接头,建立沉管隧道的简化计算模型。基于Kerr地基上Timoshenko梁理论,推导出沉管隧道整体结构的解析表达式。通过对比基于空间实体有限元的数值模拟结果,合理选取Kerr地基模型中的参数值,然后对Kerr地基模型上土层厚度与压缩模量的敏感性因素进行了分析。结果表明:合理的Kerr地基模型参数使沉管隧道纵向变形结果与实际符合程度好。另外,Kerr地基上土层厚度的增加以及土层压缩模量的减小都会使沉管整体结构纵向变形以及两端弯矩增大。
Assuming that the foundation soil of the immersed tunnel in soft soil areas was a three parameter Kerr model,and the immersed tunnel pipe joint was equivalent to a Timoshenko beam,a simplified calculation model of the immersed tunnel was established by using vertical and rotating springs to simulate the pipe joint.Based on the Timoshenko beam theory on Kerr foundation,an analytical expression for the overall structure of immersed tunnels was derived.By comparing the numerical simulation results based on spatial entity finite element,the parameters in the Kerr foundation model were determined reasonably and the sensitivity factors of soil thickness and compressive modulus on the Kerr foundation model were analyzed.The results show that reasonable Kerr foundation model parameters can make the longitudinal deformation results of immersed tunnels consistent with reality.In addition,an increase in soil layer thickness and a decrease in soil compression modulus on Kerr foundation will both lead to an increase in longitudinal deformation of the entire structure of the immersed tunnel and bending moments at the two ends of the immersed tunnel.
作者
鲍四元
顾先明
乔海青
BAO Siyuan;GU Xianming;QIAO Haiqing(School of Civil Engineering,SUST,Suzhou 215011,China)
出处
《苏州科技大学学报（自然科学版）》
CAS
2024年第2期17-24,共8页
Journal of Suzhou University of Science and Technology（Natural Science Edition）
基金
国家自然科学基金项目(11202146)
江苏省研究生科研创新与实践计划项目(KYCX23_3332)。
