摘要
蝶形拱桥是主拱圈外倾的一类桥型,具有造型美观的特点,其承载力能量尤其被桥梁工程师关注。以具体桥梁工程为实例,使用非线性有限元分析了其极限承载力,并对各种非线性因素进行参数分析。算例结果表明,在中等跨度情况下蝶形拱桥几何非线性效应不明显,极限承载力由吊索的材料非线性控制,且全跨满布荷载工况是其最不利工况。
The butterfly-shaped bridge is a kind of bridge with the main decumbent arch ring, and has the characteristic of attractive appearance. Its bearing capacity is especially concerned by the bridge engineers.Taking a butterfly-shaped arch bridge as an example, the nonlinear finite element method is used to analyze its ultimate bearing capacity, and to analyze the parameters of various nonlinear factors. The analyzing results show that the geometric nonlinear effect of butterfly-shaped arch bridge is not obvious under the condition of the medium span, the ultimate bearing capacity is controlled by the material nonlinearity of sling, and the completed-span full-load condition is its most unfavorable condition.
出处
《城市道桥与防洪》
2016年第12期75-78,共4页
Urban Roads Bridges & Flood Control
关键词
蝶形拱桥
极限承载力
非线性分析
butterfly-shaped arch bridge
ultimatebearingcapacity
nonlinearanalysis
