摘要
为了明确独柱墩梁桥的破坏机理,为独柱墩桥梁横向抗倾覆加固提供支持,通过考虑几何非线性和接触非线性,建立了独柱墩梁桥抗倾覆计算的有限元模型。结合直线以及曲线独柱墩连续箱梁有限元模型,分析了独柱墩连续箱梁抗倾覆全过程力学机理。研究结果表明:独柱墩倾覆包括端支座脱空前后两个阶段,脱空前内力变形缓慢,脱空后内力变形急剧变化;此外中墩刚度以及对曲线独柱墩桥梁设置预偏心能明显提高其抗倾覆稳定性。
To find out the failure mechanism and provide support for the reinforcement,a FEA model is built for calculating the anti-overturning of the single column pier bridges in consideration of contact non-linearity and geometric non-linearity.With the model,it is analyzed the fracture mechanism of the entire process of continuous box girder bridge with single-column.The study shows that there are two stages in the overturning process,of which in the first stage the supports is disengaging,internal force and deformation changes slowly,whereas the internal force and deformation change sharply in the second stage;the stiffness of the single-column-support pier has great effect on the stability and pivots pre-eccentricity and enhance overturning resistance ability obviously.
作者
官快
徐德志
GUAN Kuai;XU De-zhi(Guangdong Province Communications Planning & Design Institute Co. Ltd., Guangzhou 510507, China)
出处
《广东交通职业技术学院学报》
2017年第3期37-41,共5页
Journal of Guangdong Communication Polytechnic
关键词
独柱墩梁桥
破坏机理
有限元
抗倾覆稳定性
single column pier bridge
mechanism of fracture
finite element analysis
overturning resistance ability
