双向四车道系杆拱桥结构受力特性与车速影响研究

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中图分类号：U448.225 文献标志码：ADOI： 10.19968/j.cnki.hnkj.1003-5168.2025.20.013

文章编号：1003-5168（2025）20-0064-05

ResearchontheStructuralMechanical CharacteristicsandVehicle SpeedInfluence of a Two-WayFour-Lane Tied-Arch Bridge

ZHONG Yaqi1²QIU Xiangbo1²DAI Jiebin12FANG Zhibin1²HUANG Qingfu12CHEN Hui3 （1.Fujian Academy of Building Research Co.，Ltd.， Fuzhou 350108， China; 2.Fujian Provincial Key Laboratory of Green and Low-Carbon Building Technology，Fuzhou 3501O8，China; 3.Laibin Branch ofLiuzhou Expressway Operation Co.，Ltd. of Guangxi Transportation Investment Group，Laibin 5461Oo， China）

Abstract： [Purposes] This study aims to investigate the structural mechanical characteristics of a twoway four-lane tied-arch bridge under different vehicle speeds.[Methods]Based ona specific two-way fourlane tied-arch bridge project case，finite element models under diffrent vehicle speeds were established. The mechanical characteristics of the structure at 60km/h and the influence of different speeds on the structural response were analyzed.[Findings]The research indicates that during the vehicle loading process，the bridge deck systemand arch ribs primarily experience setlement deformation.Aspart of thedeformation of the bridge deck system is jointlyborne bythe hangers andarch ribs，this helps to mitigate the deformation of the deck system. The transverse bracing exhibits compression in the initial stage and tension in the later stage， while the hangers are primarily subjected to tensile stress throughout the entire loading process.Due to the uneven force distribution between thearch ribsand hangers onboth sides，the stress values in the sidetransverse bracing and the hangers are significantly greater than those in the central transverse bracing.At different vehicle speeds，the maximum deformation and stress of this tied-arch bridge both peak at 60km/h ，indicating that the displacement resonance effect between the vehicle speed and the bridge structure reaches its maximum at this speed.[Conclusions] Given the significant impact of the displacement resonance effct on thestructure，the vehicle speed that most critically influences the structure should be thoroughly considered during the design process to ensure structural safety and reliability.

Keywords： tie-arch bridge; finite element; vehicle speed; mechanical characteristics; vehicle load

0 引言

在我国高铁建设中，系杆拱桥是一种常见的桥梁类型。（剩余4378字）