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钢-UHPC组合桥面性能研究与参数分析

发表时间:2015-07-31  浏览量:1375  下载量:424
全部作者: 郭睿,肖汝诚,屈兵
作者单位: 同济大学土木工程学院
摘 要: 针对大跨度桥梁正交异性钢桥面疲劳开裂和铺装损坏问题,提出“钢-超高性能混凝土(ultra-high performance concrete,UHPC)组合桥面结构体系”。结合工程实例,对比组合桥面方案与原设计方案,结果表明:组合桥面方案自重基本与原方案持平,造价降低24%,刚度提升15%,各钢板构件疲劳应力降低40%以上,具有重大的工程应用价值。组合桥面系参数分析显示:增加钢顶板厚度对力学性能提升很小;增大纵肋刚度能显著提升桥面纵向刚度,降低热点应力;增加UHPC 厚度能全面提升桥面纵向、横向性能,但也明显增加了桥面系自重和造价。
关 键 词: 桥涵工程;钢-超高性能混凝土组合桥面系;正交异性桥面板;超高性能混凝土
Title: Mechanical properties research and parameter analysis on steel-UHPC composite bridge deck
Author: GUO Rui, XIAO Rucheng, QU Bing
Organization: College of Civil Engineering, Tongji University
Abstract: Because of fatigue cracking in orthotropic steel bridge plates and damage of asphalt pavement, this paper presents an innovative concept of “steel-ultra-high performance concrete (UHPC) composite bridge deck system”. With an engineering project, we compare the composite bridge deck system to the original deck system. The results show that self-weight of composite bridge deck system is equal to the original plan, while the price reduced by 24% and the stiffness increased by 15%, and the steel component fatigue stress reduced by more than 40%. The composite bridge deck system has great application value. Relevant parameters analysis shows that thickness increase of the steel top deck achieve little promotion to mechanical properties. Strenthening the longitudinal stiffness can significantly improves the deck longitudinal stiffness and reduce hot-spot stress. Thickness increase of the UHPC-layer obviously improves the mechanical properties of bridge deck in both longitudinal and lateral direction, but it also increases the weight and cost of floor system.
Key words: bridge and culvert engineering; steel-ultra-high performance concrete composite bridge deck system; orthotropic steel bridge plates; ultra-high performance concrete
发表期数: 2015年7月第14期
引用格式: 郭睿,肖汝诚,屈兵. 钢-UHPC组合桥面性能研究与参数分析[J]. 中国科技论文在线精品论文,2015,8(14):1476-1482.
 
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