建筑钢结构进展2026，Vol.28Issue(1)：47-55,9.DOI:10.13969/j.jzgjgjz.20240815002
型钢开口肋-UHPC组合桥面板构造细节疲劳性能研究
Research on Fatigue Performance of Structural Details in Section Steel-UHPC Composite Bridge Decks with Open Ribs
摘要
Abstract
Fatigue cracking of typical structural details can significantly cause fatigue resistance reduction of orthotropic steel bridge decks(OSDs)and shorten the service life.A hot-rolled section steel-ultra-high performance concrete(UHPC)lightweight composite bridge deck with open ribs(HSD),which was first used in the steel box girder of a long-span arch bridge,was taken as the research object.The refined three-dimensional finite element analysis models with mixed shell and solid elements for steel-box girder segment were established.Fatigue loading and theoretical analysis were conducted to explore the stress distributions and fatigue damage characteristics of typical fatigue-prone details,and to predict the fatigue life.The results indicate that rib-to-deck and rib-to-crossbeam welded joints are two types of critical structural details determining the fatigue performance of HSD.Each type of welded joints has multiple fatigue failure modes,and the stress distributions and fatigue performance of the welded joint corresponding to different failure modes have significant differences.Fatigue properties of the two types of welded joints are determined by the fatigue resistance of toe-deck failure and toe-crossbeam failure,respectively.When traffic growth is taken into account,the fatigue cumulative damage of each fatigue failure mode in the two welded joints increases significantly and exhibits representative nonlinear growth.By contrast,the rib-to-crossbeam welded joint has lower fatigue strength and a shorter fatigue life below the design life.This welded joint has a higher risk of fatigue cracking during the design service life.Therefore,the improvement of local structural details and more inspection and maintenance are needed to ensure the fatigue resistance and service safety of HSD.关键词
UHPC组合桥面板/型钢开口肋/构造细节/疲劳性能/疲劳累积损伤/有限元分析Key words
UHPC composite bridge deck/section steel open rib/structural detail/fatigue performance/fatigue cumulative damage/finite element analysis分类
交通工程引用本文复制引用
王志宏,李秉海,黄云,陈阳,付承涛,戴笠,曾鹏罡..型钢开口肋-UHPC组合桥面板构造细节疲劳性能研究[J].建筑钢结构进展,2026,28(1):47-55,9.基金项目
国家自然科学基金(52368017),江西省自然科学基金(20212BAB204011) （52368017）
