主 讲 人：李宾宾
讲座时间：2024年5月17日 15：30-17：00
讲座地点：L栋817室
主讲人简介：
李宾宾，浙江大学伊利诺伊大学联合学院助理教授（2018-至今），同时也是浙江大学建筑工程学院和伊利诺伊大学厄巴纳香槟校区土木与环境工程学院兼职助理教授。他于2016年在美国加州伯克利分校获得土木工程博士学位，于2009年和2012年分别获得大连理工大学土木工程本科和结构工程硕士学位。主要从事土木工程结构健康监测、基础设施系统韧性等领域研究，具体研究方向包括贝叶斯系统辨识、结构动力分析与测试、不确定性量化及极端荷载模拟等。先后主持国家自然科学基金、浙江省自然科学基金项目，并参与多项国家/省部级项目，目前已发表领域内国内外顶级期刊论文近40篇，获教育部高等学校科学研究优秀成果科学技术进步奖一等奖，国际土木工程风险与可靠度协会CERRA学生表彰奖以及多个会议最佳论文奖等，担任中国振动工程学会监测与控制青年委员会委员、美国土木工程师学会概率方法委员会委员等学术职务。
讲座内容简介：
Vibration testing has become a routine task in the condition assessment of built civil structures. However, the uncertainties involved in the test are still mysterious to most practitioners. A systematic treatment of uncertainties in vibration test will be introduced in this talk to demystify the related concepts, including their computation, understanding, and management. For computation, the fast Bayesian FFT method will be discussed in detail for both known and unknown input cases. It allows the uncertainty quantification via the posterior distribution of model parameters. The recently developed uncertainty law theory will then be briefly overviewed, which analytically explains how the identification uncertainty depends on the test configuration and provides a chance to understand the identification uncertainty for the first time. Based on uncertainty laws, the uncertainty management is finally considered with the target to minimize it, by optimizing the test configuration, e.g., the number and location of sensors. It is formulated as a decision-making problem under uncertainty, and thus can be solved consequently. Various applications of high-rise buildings and long-span bridges are included in each section, illustrating the performance and validating the theory. Uncertainties provide a unique perspective to understand the vibration problem of civil structures and can serve the engineering practice.
