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原文传递 Challenges in Bridge Engineering: From Wobbly Footbridges to Autonomous Morphing of Bridge Decks under Winds

题名：	Challenges in Bridge Engineering: From Wobbly Footbridges to Autonomous Morphing of Bridge Decks under Winds
正文语种：	中文
作者：	Ahsan Kareem NAE
作者单位：	Modeling Laboratory,University of Notre Dame,Notre Dame,USA
关键词：	Bridge Flutter Buffeting VIV Shape Optimization Footbridges Structural Health Monitoring Citizen Sensing Nonlinear Aerodynamics/Aeroelasticity
摘要：	This paper presents a synopsis of challenges and candidate solutions for bridges that range from wobbly footbridges to futuristic long span bridges equipped to morph their shape for enhancing their performance to vortex-induced vibration (VIV),buffeting and flutter.For wobbly footbridges a comprehensive protocol for designing under winds is advanced based on a field measurement campaign that relies on a validated "citizen sensing" to monitor dynamics of remote bridges.Regarding the modern long span bridges with streamlines decks issues surrounding nonlinear aerodynamics and the role of turbulence and non-stationary winds are highlighted.A cache of solutions based on reduced-order models to capture nonlinear features these bridges are known to exhibit are presented.The role of shape optimization of bridge decks is discussed with a vision of real-time morphing of bridge deck profile through sensing, optimization, machine learning and actuation.This futuristic autonomous approach promises to enhance the performance of bridges to optimal under a range of wind actions that include, VIV, buffeting and flutter.
会议日期：	20170926
会议举办地点：	杭州
会议名称：	国际工程科技发展战略高端论坛——第七届桥梁与隧道工程技术论坛
出版日期：	2017-09-26
母体文献：	国际工程科技发展战略高端论坛——第七届桥梁与隧道工程技术论坛论文集