连续梁桥转体施工球铰接触应力分析  

Analysis on Contact Stress of Spherical Joint in Continuous Beam Bridge Rotary Construction

作　　者：宁世凯 NING Shikai(Yinba Railway Project Management Department of China Railway Construction Bridge Engineering Bureau Group Co.Ltd.,Yinchuan Ningxia 750000,China)

机构地区：[1]中国铁建大桥工程局集团有限公司银巴铁路项目经理部,宁夏银川750000

出　　处：《铁道建筑技术》2024年第8期124-126,157,共4页Railway Construction Technology

基　　金：宁夏回族自治区自然科学基金项目(2023AAC02025)。

摘　　要：随着相关计算理论与工业技术迅速发展,转体施工法在桥梁工程建设中扮演着重要角色。考虑到转体施工过程球铰处于复杂受力状态,对其进行必要的受力分析尤为重要。以跨包兰铁路连续梁桥为例,分析球铰在转体施工状态下的受力性能。采用基于国家规范的简化计算法与非赫兹接触理论对球铰节点应力进行理论计算,并采用有限元方法对球铰进行静力作用下的数值仿真分析;以有限元分析结果作为精确值,对两种理论计算结果进行误差分析。结果表明,有限元法可有效模拟球铰的实际受力状态,理论计算结果误差相对较大,但在特殊情况下依然具有较高精度。With the rapid development of relevant computational theory and industrial technology,the rotary construction method plays an important role in bridge engineering construction.Considering that the spherical joint is in a complex stress state during the rotary construction process,it is particularly important to conduct necessary force analysis on it.Taking the continuous beam bridge of Baotou-Lanzhou Railway as an example,the stress performance of the spherical joint under the rotary construction state was analyzed.The simplified calculation method based on national standards and the non-Hertz contact theory method were used to theoretically calculate the stress of the spherical joint,and the finite element method was used to conduct numerical simulation analysis of the spherical joint under static action.Using the finite element analysis results as accurate values,the error analysis on the two theoretical calculation results was conducted.The results show that the finite element method can effectively simulate the actual force state of the rotary joint,and the theoretical calculation results have relatively large errors,but still have high accuracy in special cases.

关 键 词：连续梁桥 转体施工 接触应力 理论计算 有限元模拟 精度对比 

分 类 号：U448.215[建筑科学—桥梁与隧道工程] U445.465[交通运输工程—道路与铁道工程]