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Daniel Dias: Numerical analyses of segmental tunnel linings under static and dynamic loads
发布日期:2017-12-06  字号:   【打印

报告时间:2017年12月7日(星期四)15:00

报告地点:屯溪路校区人文楼“交通环境与能源”外专千人研讨室

  Daniel Dias 教授

工作单位:Grenoble Alpes University

举办单位:汽车与交通工程学院

报告人简介

Daniel Dias 教授是我校兼职教授,安徽省外专"百人计划"获得者。Daniel Dias 教授毕业于法国国立应用科学学院(INSA),现为法国阿尔卑斯大学(Grenoble Alpes University)一级教授,法国土力学技术委员会委员,岩土工程系主任。Dias教授长期致力于城市轨道交通等方面的研究,以课题第一负责人承担法国国家研究计划等重大科研计划2项(ASIRi&ARSCOP),完成理论著作1部,在《Geotechnique》、《ASCE Journal of Geotechnical and Geoenvironmental Engineering》等岩土工程国际权威期刊上发表论文70余篇,同时也是数个国际知名刊物的审稿专家。Dias教授先后获得法国Electricity of France等十数家相关公司的资助,主持或参与过South Toulon tunnel 等十余座隧道的建设以及科研项目,具有丰富相关项目管理及工程实施经验。

报告简介

This talk will deal with the behavior of segmental tunnel lining by developing a new numerical approach to the Hyperstatic Reaction Method (HRM) and producing two-dimensional (2D) and three-dimensional (3D) numerical models using the finite difference method (FDM). 

A new numerical approach applied to the HRM has then been developed. At the same time, a 2D numerical model is programmed regarding static loading conditions in order to evaluate the influence of the segmental joints, in terms of both joint distribution and joint stiffness characteristics, on the tunnel lining behavior. After that, full 3D models of a single tunnel, twin horizontal tunnels and twin tunnels stacked over each other, excavated in close proximity in which the joint pattern is simulated, have been developed. These 3D models allow one to investigate the behavior of not only the tunnel lining but also the displacement of the ground surrounding the tunnel during the tunnel excavation. A simplified 3D numerical model has then been produced in order to validate the new numerical approach applied to the HRM. 

In the last part of this research work, the performance of segmental tunnel lining exposed to a dynamic loading is taken into consideration through a quasi-static and a full dynamic analyses using 2D numerical models (FDM). A new HRM model has also been developed considering quasi-static loads. The differences of the tunnel behavior under static and seismic loadings are highlighted.

(孙志彬/文)  
编辑:徐小红
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