钢骨混凝土复合桥墩抗撞性能与设计方法研究

项目名称： 钢骨混凝土复合桥墩抗撞性能与设计方法研究

项目编号： No.51278243

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 张南

作者单位： 南京工业大学

项目金额： 80万元

中文摘要： 桥梁遭受车船撞击而损坏跨塌，近年成为桥梁和交通部门高度关注的重要问题。解决桥梁受撞问题有三个主要对策：防止桥墩受撞击，减少撞击力，提高桥墩抗撞强度。针对目前采用的防撞设施体量庞大，造价昂贵，多采用钢材的弹塑性变形来消能减撞，其消能效率低等问题，本项目研究将高效消能材料设置在桥墩受撞面减少撞击力,内置型钢加强桥墩抗撞刚度与强度，实现缓冲增强双重机制；研究钢骨混凝土桥墩在偏心受压和侧向撞击下的破坏机理、动力分析模型及强度设计方法；研究桥墩撞击动力响应与缓冲材料特性的相互关系；研究撞击力的设计取值和控制方法；研究桥墩综合承载力优化设计方法。探索采用钢骨提高桥墩自身抗撞能力的新途径，解决桥梁受撞垮塌问题，减少防撞设施规模和费用。阐明钢骨混凝土桥墩抗撞强度组成机制与动力响应特性。揭示撞击过程中缓冲材料性能影响撞击力峰值和桥墩动力响应的规律。建立基于提高抗撞能力的钢骨混凝土桥墩综合承载力优化设计方法。

中文关键词： 钢骨混凝土；桥墩；撞击性能；试验研究；设计方法

英文摘要： Bridge damage and collapse due to vehicle and ship collision with bridge pier has become an important prorblem highly concerned in bridge and transportation department recently. There are three major countermeasures to solve this problem: preventing pier from impact, reducing impact force, increasing impact strength of pier. Aiming at the problems that anti-collision device is bulky and expensive, adopting elastoplastic deformation of steel to dissipate impact energy , and having low efficincy of impact energy dissipation, the research contents of this project are: 1）to apply buffer matearial with high efficiency to the pier surface reducing impact force, and to embed profile steel strengthening impact rigidity and strength of pier, achieving double mechanism of buffering and stengthening;2）to research the failure mechanism ,dynamic analysis model and strength design method of steel reinforced concrete pieas subjected to eccentric compression and lateral impact, 3)to research the relasionship between the impact dynamic response of steel reinforced concrete pier and the buffer material properties, 4）to research the design value and control method of impact force； 5）to reaserch the optimization design method of comprehensive carrying capacity of piers. The research purpose of this project are :1)to explore new ap

英文关键词： steel reinforced concrete；pier；impact performance；experimental study；design method