主讲人：Hsein Juang（庄长贤）教授

邀请人：肖军华 教授

时间：2018年5月22日下午13:30-15:30

地点：tyc8722太阳集团城102会议室

主讲人简介

       庄长贤教授为美国克莱姆森大学土木工程系格伦教授，主要从事工程结构可靠度与风险管理研究。曾担任美国土木工程师学会风险评估与管理委员会主席，在国际权威SCI期刊发表论文200余篇，学术引用超过5500次，H-index达到40。入选全球土木工程高被引学者。目前担任国际著名期刊Engineering Geology主编。

主讲内容简介

      This report presents an improved design methodology for shield tunnels. A new framework for three-dimensional analysis of shield tunnel "performance" (defined herein as the structural safety and serviceability of each tunnel ring) is developed, which considers the effect of the longitudinal variation of input parameters on the tunnel performance. Within this framework, random fields are used to simulate the longitudinal variation of input parameters, and the three-dimensional problem of shield tunnel performance is solved through a two-stage solution involving a one-dimensional model (for tunnel longitudinal behavior) and a two-dimensional model (for performance of segment rings). Furthermore, the robust design concept is integrated into the design of shield tunnels to guard against the longitudinal variation of tunnel performance caused by the longitudinal variation of input parameters. In the context of robust design, a new measure is developed for determining the robustness of the tunnel performance against the longitudinal variation of noise factors. A multi-objective optimization is then performed to optimize the design with respect to the design robustness and the cost efficiency, while satisfying the safety and serviceability requirements. Through an illustrative example, the effectiveness and significance of the improved shield tunnel design methodology is demonstrated.

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