大跨径钢波纹板拱涵加强方式研究
Research on Strengthening Methods of Large Span Steel Corrugated Plate Arch Culvert
冉赛佳 1刘鹏宇 2熊保林 1刘家乐1
作者信息
- 1. 石家庄铁道大学 道路与铁道工程安全保障省部共建教育部重点实验室,河北 石家庄 050043;石家庄铁道大学 土木工程学院,河北 石家庄 050043
- 2. 中国铁路北京局集团有限公司 北京工电大修段,北京 100071
- 折叠
摘要
为探究钢波纹板拱涵采取加强措施后的力学性能,以阳泉市绕城改线工程为依托,选择环向加强和双向加强措施,采用数值模拟方法来对比分析钢波纹板拱涵应力与变形,分析其加强效果.结果显示:拱涵整体受压,应力与变形均呈对称分布,受螺栓连接影响,在拱脚处应力最大,拱腰次之,拱顶应力最小,最大竖向变形位于拱顶,波峰和波谷变形一致,应力有所差距,拱腰处波谷应力比波峰应力大4.83%,拱顶处波峰应力比波谷应力大 18.78%;采取加强措施后拱涵的应力及变形大幅降低,拱脚处的应力集中程度减少,但在加强处出现应力集中,相较于波谷,波峰加强效果更明显;增加环向加强管钢的数量,结构刚性也随之提高,加强效果愈发明显,应力最大降幅为68.38%,竖向变形最大降幅为10.29%,而轴向加强效果不太显著.
Abstract
To investigate the mechanical properties of reinforced steel corrugated plate arch culverts,based on the Yangquan Ring Road realignment project,circumferential reinforcement and bidirectional reinforcement measures were selected.Numerical simulation methods were used to compare and analyze the stress and deformation of steel corrugated plate arch culverts,and to analyze their reinforcement effects.The results show that the arch culvert is under overall compression,with stresses and deforma-tions symmetrically distributed.Under the influence of bolt connection,the stress is highest at the arch foot,followed by the arch waist,and the stress at the arch crown is the smallest.The maximum vertical deformation is located at the arch crown,and the deformation at the peak and valley is consistent,with a difference in stresses.The stress at the peak and valley of the arch waist is 4.83%greater than that at the peak,and the stress at the peak and valley of the arch crown is 18.78%greater than that at the val-ley.After strengthening,the stress and deformation of the arch culvert are significantly reduced,and the stress concentration at the arch foot decreases.However,stress concentration occurs at the strength-ening point,and compared to the valley,the peak strengthening effect is more obvious.By increasing the number of circumferential reinforcement pipes,the structural rigidity also increases,and the rein-forcement effect becomes more pronounced.The maximum reduction in the stress is 68.38%and the maximum reduction in the vertical deformation is 10.29%,while the axial reinforcement effect is not very significant.
关键词
钢波纹板拱涵/大孔径/加强方式/车辆荷载Key words
steel corrugated plate arch culvert/large aperture/strengthening method/vehicle load引用本文复制引用
出版年
2024
NETL
NSTL
万方数据