东南大学学报（自然科学版）2023，Vol.53Issue(6)：1028-1033,6.DOI:10.3969/j.issn.1001-0505.2023.06.009
台风环境大跨度廊桥非平稳抖振分析及舒适度评估
Non-stationary buffeting analysis and comfort assessment of long-span corridor bridge in typhoon environment
摘要
Abstract
A finite element model of a certain bridge at the coastal area in Southeast China was established and regarded as the engineering background.Based on the typhoon turbulent evolution spectrum model,the non-stationary turbulent wind field were simulated and validated.Non-stationary vibration analysis and comfort as-sessment for the long-span corridor bridge in the typhoon environment were carried out.The analysis results were compared with those obtained by a stationary turbulent spectrum with the same mean wind speed.The re-sults indicate that during the periods with high time-varying mean wind speeds,the amplitude of the non-sta-tionary wind velocity significantly increases.The acceleration of the non-stationary vibration is higher than that of the stationary vibration.The vertical peak vibration values of stationary and non-stationary vibrations are greater than the horizontal peak vibration values.However,both vertical and horizontal vibration peak values fall within the ultimate comfort limits in the code.Furthermore,the non-stationary vibration peak values are closer to the comfort limit in the code than the stationary one.Therefore,considering the non-stationary char-acteristics of typhoon turbulence to conduct wind-resistant design for long-span corridor bridges is safer and more rational.关键词
廊桥/台风/抖振分析/舒适度评估/非平稳Key words
corridor bridge/typhoon/buffeting analysis/comfort assessment/non-stationary分类
交通工程引用本文复制引用
徐梓栋,王浩,赵恺雍,郎天翼,温学华..台风环境大跨度廊桥非平稳抖振分析及舒适度评估[J].东南大学学报（自然科学版）,2023,53(6):1028-1033,6.基金项目
国家自然科学基金资助项目(51978155,52208481)、中国博士后科学基金资助项目(2023M730581)、江苏省卓越博士后计划资助项目(2023ZB674). （51978155,52208481）
