摘要
为研究增大截面加固法对小跨径拱桥承载能力的影响,以3座跨径分别为10、13、16m的拱桥为研究对象,采用midas civil软件建立全桥有限元模型,并结合相关规范计算了增大截面加固法加固前后拱桥的设计荷载,并基于计算结果,总结了增大截面加固法对小跨径拱桥承载能力的影响,为今后小跨径拱桥的加固提供部分工程经验。计算结果为增大截面加固法可以有效降低截面下缘的拉应力和压应力,但是会增加拱轴线的偏心距,影响拱轴线对恒载压力线的偏离值,因此得出结论,小跨径拱桥的增大截面加固法不能盲目的进行加固,主拱圈应根据自身的拱轴线系数,通过计算确定最优加固厚度,使得加固后截面的偏心距尽量小,以达到最优加固效率。
Three arch bridges with spans of 10m,13m and 16m are used as the research objects.The midas civil software is used to establish the finite element model of the whole bridge,and the design loads of the front and rear arch bridges before and after the reinforcement method are calculated in combination with the relevant specifications.Based on the calculation results,the effect of increasing the cross-section reinforcement method on the bearing capacity of the small-span arch bridge is summarized,providing engineering experience for the reinforcement of the small-span arch bridge in the future.The results show that the method of increasing the section reinforcement can effectively reduce the tensile stress and compressive stress at the lower edge of the section.However,it increases the eccentricity of the arch axis and affects the deviation of the arch axis from the dead load pressure line.The optimal reinforcement thickness of the main arch ring should be determined by calculation according to its arch axis coefficient,so as to minimize the eccentricity of the section after reinforcement,and achieve the optimal reinforcement efficiency.
作者
郝小军
HAO Xiaojun(Chongqing Leway Civil Engineering Design Co.,Ltd.,Chongqing 400060,China)
出处
《低温建筑技术》
2022年第12期138-141,146,共5页
Low Temperature Architecture Technology
关键词
拱桥
增大截面加固法
承载能力
arch bridge
increasing section reinforcement method
bearing capacity
作者简介
郝小军(1983-),男,四川达县人,硕士研究生,高级工程师,现从事路桥设计及工程项目管理。
