梁式桥桥墩计算长度系数研究  

Study on Effective Length Factor of Girder Bridge Pier

作　　者：董佳霖 黄亮 徐伟杰 包江磊 DONG Jia-lin;HUANG Liang;XU Wei-jie;BAO Jiang-Lei(Zhejiang Institute of Communications CO.,LTD,Hangzhou 311006,China)

机构地区：[1]浙江数智交院科技股份有限公司,浙江杭州310006

出　　处：《浙江交通职业技术学院学报》2024年第1期13-18,65,共7页Journal of Zhejiang Institute of Communications

摘　　要：桥墩计算长度系数是影响桥墩设计的一个重要参数,值的取值过小会造成结构设计不安全,取值过大会造成设计不经济。本文考虑相邻桥墩抗推刚度与支座水平刚度对墩顶弹性约束的影响,从理论分析角度提出了桥墩计算长度系数的求解方法,并结合有限元模型,利用欧拉公式中的临界荷载与桥墩计算长度系数的关系,对比分析理论解与有限元模型计算的差异。此外本文还探讨了墩高、墩径及桥跨布置形式对梁式桥桥墩计算长度系数的影响和变化规律,为相似桥墩计算长度系数的取值及桥墩设计提供了依据。Effective length factor is an important parameter affecting the design of pier.The small value will cause unsafe design;conversely,will cause uneconomical design.This paper considered the influence of thrust stiffness of adjacent bridge pier and horizontal stiffness of bearings,and proposed a theoretical algorithm for calculating effective length factor of pier.This paper comparatively analyzed the difference between the proposed theoretical method and the finite element model calculation by using the relationship between critical load of Euler’s Formula and Pier effectine Length factor.The influence of pier height,pier diameter and span arrangement on effective length factor were also discussed.In summary,the method proposed in this study provides a basis for the calculation of effective length factor and the design of the pier.

关 键 词：计算长度系数 临界荷载 有限元分析法 墩顶约束刚度 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]