沉管隧道接头力学模型及刚度解析表达式

发布时间：2018-05-20 18:46

本文选题：沉管隧道 + 接头刚度　；参考：《工程力学》2014年06期

【摘要】：接头刚度是表征沉管隧道接头性能的最重要参数。目前沉管隧道接头刚度的取值既无现成的解析表达式或图表可循,也无接头力学性能试验数据支持。该文根据接头构造设计特点提出力学假定,将接头GINA止水带抽象为弹簧,接头板则假定为不产生挠曲变形的刚性板,在此基础上建立了接头的力学模型。根据受力平衡方程和变形协调方程,推导出接头刚度的解析表达式。通过与所设定的接头三维精细化基准模型在相同设计参数下的结果对比,验证了接头力学模型及刚度解析解的合理性。最后应用该力学模型进行了接头参数敏感性分析,预测了各种因素对接头刚度的影响规律。
[Abstract]:Joint stiffness is the most important parameter to characterize the joint performance of immersed tunnel. At present, there is no available analytical expression or chart for determining the joint stiffness of immersed tunnel, nor is it supported by the test data of joint mechanical properties. This paper presents a mechanical assumption according to the structural design characteristics of the joint, abstracting the GINA water stop belt of the joint as a spring and the joint plate as a rigid plate without flexural deformation. On this basis, the mechanical model of the joint is established. According to the stress balance equation and deformation coordination equation, the analytical expression of joint stiffness is derived. The rationality of the mechanical model and the stiffness analytical solution of the joint is verified by comparing the results with the three dimensional refined reference model of the joint under the same design parameters. Finally, the sensitivity analysis of joint parameters is carried out by using the mechanical model, and the influence of various factors on joint stiffness is predicted.
【作者单位】：同济大学地下建筑与工程系;上海交通大学土木工程系;同济大学岩土及地下工程教育部重点实验室;中交公路规划设计院有限公司;
【基金】：中国博士后科学基金项目(2012M510113) 国家自然科学基金项目(51208296) “十一五”国家科技支撑计划项目(2011BAG07B01) 长江学者和创新团队发展计划项目(IRT1029)
【分类号】：U452

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