铁道标准设计2026，Vol.70Issue(9)：59-68,10.DOI:10.13238/j.issn.1004-2954.202410250001
脉动风作用下大跨斜拉桥上无砟轨道抖振响应
Buffeting Response of Ballastless Track on Long-Span Cable-Stayed Bridge under Fluctuating Wind Loads
摘要
Abstract
[Objective]Long-span cable-stayed bridges are prone to buffeting under fluctuating wind due to their flexibility.To investigate the buffeting response patterns of the bridge and track structures of the CRTS double-block ballastless track continuous welded rail on a long-span cable-stayed bridge under fluctuating wind loads,the vertical and longitudinal mechanical characteristics of the bridge and track structures are analyzed.[Methods]Taking a four-line prestressed concrete cable-stayed bridge as an example,a refined spatial coupling model of the ballastless track on the long-span cable-stayed bridge was established based on the finite element method.The three-component force coefficients of the main girder cross-section,fluctuating wind speed time histories,and buffeting force time histories were simulated and calculated,and the buffeting force loads were applied to the bridge-track system.[Results]The peak force(stress)and displacement of the bridge and track structures were mainly distributed at the main piers,side piers,and midspan of the cable-stayed bridge.The vertical stress peak of the track slab structure was the largest,approximately 2.7 times the longitudinal stress peak.The longitudinal stress peak of the bridge structure was the largest,approximately 3.5 times the vertical stress peak,and the vertical and longitudinal stress peaks of the base slab structure were similar.The vertical displacement of each structure reached the maximum at the main piers of the cable-stayed bridge,while the longitudinal displacement reached the maximum in the areas near both sides of the main piers.The vertical displacement peak was approximately 25 times the longitudinal displacement peak.In the vertical displacement envelope diagrams of each structure,the displacement curves varied relatively smoothly.The vertical and longitudinal displacement curves of the structures beneath Rail No.1 and Rail No.2 showed similar displacement values but opposite directions.Under fluctuating wind loads,the girder exhibited an overall vertical overturning tendency,and the bridge and track structures showed a tendency toward lateral bending.[Conclusion]The research findings provide a reference for the design,monitoring,and maintenance of long-span railway cable-stayed bridges and ballastless tracks in strong-wind areas.关键词
高速铁路/大跨度桥/斜拉桥/CRTS双块式无砟轨道/脉动风荷载/抖振Key words
high-speed railway/long-span bridge/cable-stayed bridge/CRTS double-block ballastless track/fluctuating wind load/buffeting分类
交通工程引用本文复制引用
张鹏飞,李冠霖,温月,胡伟成..脉动风作用下大跨斜拉桥上无砟轨道抖振响应[J].铁道标准设计,2026,70(9):59-68,10.基金项目
国家自然科学基金项目(52178425,52368063) （52178425,52368063）
江西省自然科学基金重点项目(2025BAC250113) （2025BAC250113）
