摘要
针对钢桥面板疲劳开裂和铺装层破损两大技术性难题,提出一种超高性能混凝土(UHPC)-钢正交异性板组合桥面体系。该体系由配有钢筋网的UHPC薄层与钢桥面板通过短剪力钉组合而成。对该组合桥面体系短剪力钉抗剪性能、静力承载性能、开裂强度影响参数、疲劳承载性能、抗水渗透性能开展试验研究,结果表明:UHPC超高的力学性能及耐久性能能够满足组合桥面体系的使用需求;通过合适的设计可保证UHPC层与钢正交异性板的可靠连接;在设计荷载作用下,组合桥面体系UHPC层能够满足抗裂性能要求,且具备较大的静力承载能力富余度;500万次疲劳加载后,组合桥面体系受力状态良好,未出现明显疲劳损伤;组合桥面体系抗渗性能满足P20等级要求。
To resolve the two technical problems of fatigue cracking and pavement damage in steel bridge deck,a composite bridge deck system with UHPC and orthotropic steel plate is proposed,in which the thin UHPC layer with reinforcement mesh and the steel plates are connected by short shear studs.A series of experimental studies are carried out to examine the behavior of the composite deck system,including the shear-resistant property of the short shear studs,static bearing capacity,influential parameters of cracking strength,fatigue bearing capacity,and waterproof performance.The results reveal that the ultra-high mechanical property and durability of UHPC can meet the functional requirements of the composite bridge deck system,and by reasonable design,the UHPC layer and the orthotropic steel plates can be reliably connected.Under the action of design loads,the UHPC layer can meet the anticracking requirements,and has a large static bearing margin.After 5 million numerical cycles, the composite bridge deck system is still in good load bearing state,and no noticeable fatigue damages occur.The permeability of the composite bridge deck system meets the requirements of Grade-P20.
作者
田启贤
高立强
周尚猛
肖林
TIAN Qi-xian;GAO Li-qiang;ZHOU Shang-meng;XIAO Lin(State Key Laboratory for Health and Safety of Bridge Structures,Wuhan 430034,China;China Railway Bridge Science Research Institute,Ltd.,Wuhan 430034,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2019年第A01期13-19,共7页
Bridge Construction
基金
中国中铁股份有限公司科技研究开发计划项目(2018-重点-10,2019-重大-05)~~
关键词
钢桥面板
组合桥面体系
正交异性板
超高性能混凝土
短剪力钉
承载性能
疲劳性能
抗渗性能
模型试验
steel bridge deck
composite bridge deck system
orthotropic plate
ultrahighperformance concrete
short shear stud
load-bearing property
fatigue property
permeability
model test
