Analysis and Investigation on Wind-Induced Structural Response of Bridges by Computational Fluid Dynamics

• Main Authors: Yun Chuang, 莊耘
• Other Authors: Yu-Chi Sung
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/mt2ew2

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 103 === As being a stable analysis tool of computational fluid dynamics (CFD), the software Fluent associated with the developed program as postprocessor was used in this thesis to study wind-induced structural response of the bridges. Firstly, the famous aero-instability of Tacoma Narrow Bridge, USA was served as case study. The characteristic of wind field surrounding bridge section and the moderate-to-serve vibration of bridge deck before collapse are able to be analyzed and displayed. Secondly, the dimensionless coefficients of drag force, lift force and torsion at bridge deck due to different wind attack angle for two cable-stayed bridges of Sutong, China and Kao-Ping Hsi, Taiwan, respectively, were studied and discussed with results of wind tunnel test. Furthermore, analysis of flutter derivative for ideal plate and Kao-Ping Hsi Bridge, Taiwan were carried out and investigated by theoretical illustration and experimental result of wind tunnel test, respectively. The critical wind speed causing structural divergence is able to be determined. The results obtained shows a proper use of CFD could give a good simulation on wind-induced structural response of bridges and serve as prediction before wind tunnel test, benefiting wind resistance design of bridges.