| 钢筋混凝土拱基于模态频率的承载能力评估 |
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| 引用本文： | 蒋友宝,刘扬,张建仁.钢筋混凝土拱基于模态频率的承载能力评估[J].公路交通科技,2009,26(8). |
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| 作者姓名： | 蒋友宝 刘扬 张建仁 |
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| 作者单位： | 长沙理工大学土木与建筑学院,湖南,长沙,410114 |
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| 基金项目： | 交通部西部交通建设科技项目 |
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| 摘 要： | 基于钢筋混凝土拱破坏过程中模态频率的变化规律,进行了承载能力评估方法的研究.对某旧桥中的2根钢筋混凝土拱肋进行了加栽过程中的模态试验.基于试验结果和有限元分析研究了有初始损伤和完好的钢筋混凝土拱破坏过程中的模态变化规律,并采用曲线拟和的方法对钢筋混凝土拱的极限承栽能力进行了预测.结果表明,该拱接近破坏时模态频率会下降,但各阶模态频率的下降程度与最弱刚度截面的位置有关;拱破坏过程中第1阶模态频率值与所受荷载之间的关系可近似用二次方程来描述.
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| 关 键 词： | 桥梁工程 钢筋混凝土拱 极限承载能力 模态频率 损伤 |
Evaluation of Load Bearing Capacity of Reinforced Concrete Arch Based on Modal Frequency |
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| JIANG Youbao,LIU Yang,ZHANG Jianren.Evaluation of Load Bearing Capacity of Reinforced Concrete Arch Based on Modal Frequency[J].Journal of Highway and Transportation Research and Development,2009,26(8). |
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| Authors: | JIANG Youbao LIU Yang ZHANG Jianren |
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| Institution: | School of Civil Engineering and Architecture;Changsha University of Science and Technology;Changsha Hunan 410114;China |
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| Abstract: | Based on the modal frequency changes in failure process,an evaluation method of load bearing capacity of reinforced concrete arch was studied.Modal experiments during the loading process of two reinforced concrete arch ribs from an old bridge were performed.Based on the experimental results and finite element analysis,the modal changes in failure processes of the arch with initial damage and the perfect arch were analyzed.Then the ultimate bearing capacity was forecasted with the curve fitting method.It sho... |
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| Keywords: | bridge engineering reinforced concrete arch ultimate bearing capacity modal frequency damage |
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