摘要
刚构-单肋拱组合桥梁是一种新型的桥梁结构型式,稳定性问题是不可避免的。通过一座实桥建立有限元模型,分析了恒载、风载和列车荷载等荷载组合作用下的第一类稳定问题和考虑几何、材料等非线性因素恒载作用下的第二类稳定问题,并探讨了影响整体稳定的有关因素,得出材料非线性和非保向力效应对刚构-单肋拱组合桥梁的稳定性影响较大,在同类桥型的设计中应予以重视。
The combinative bridge with rigid frame and single-ribbed tied arch is a new kind of bridge structures,and its stability problem is more serious.Taking Baisha River Bridge which is under construction in Guangzhou as engineering background,the first sort of stabilities under the combined action of dead loads,wind loads and train loads,and the second sort of stabilities under the action of dead load taking into account the geometrical nonlinearity and material nonlinearity were analysed.Furthermore,the influencing factors on overall stability were studied.The stability effect of material nonlinearity and non-directional loads on the combinatve bridge with rigid frame and single-ribbed tied arch is great and it should be paid much attention to this kind of bridges.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第12期122-125,共4页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50478051),(50708035)
关键词
刚构
钢箱拱肋
单肋拱
稳定性
rigid frame
steel box arch
single-ribbed arch
stability
