大跨径桥梁转体施工混凝土球铰优化措施分析
Analysis on Optimization Measure for Concrete Spherical Hinge in the Swivel Construction of Large-span Bridge
罗东1
作者信息
- 1. 中交公路规划设计院有限公司四川分公司,四川 成都 610200
- 折叠
摘要
基于理论分析及实际案例,文章对大跨径桥梁转体施工混凝土球铰的优化措施进行了深入分析,结合案例数据分析可知,三种方法与实际测量结果对比,均存在一定误差.公式技术法的误差最大,约为 95%;有限元分析结果误差最小,其最小误差值为 0.1%;非Hertz算法和有限元分析的接触应力值与实际测量值相近;不同位置处的接触应力随着旋转体的角度变化而变化,且未表现出明显规律,转体转动45°、90°和135°时,接触应力相比转动前有部分增加,但仍小于设计应力要求,而且仍有一部分应力小于转动前的应力.
Abstract
Based on the theoretical analysis and practical cases,the optimization measures of concrete spherical hinge in the swivel construction of large-span bridges are analyzed in depth.Combined with the analysis of case data,it can be seen that there are some errors between three methods and the actual measurement results.The error of the formula technique method is the largest,about 95%;the error of finite element analysis results is the smallest,with a minimum error value of 0.1%;the contact stress values of non-Hertz algorithm and finite element analysis are close to the actual measured values;the contact stress at different positions varies with the angle of the rotating body,and does not show obvious regularity;when the rotating body rotates 45°,90° and 135°,the contact stress increases to some extent compared with that before rotation,but it is still less than the design stress requirement,and there is still a part of the stress is less than the stress before rotation.
关键词
大跨径桥梁/转体施工/混凝土球铰/接触应力Key words
large-span bridge/swivel construction/concrete spherical hinge/contact stress引用本文复制引用
出版年
2024
NETL
NSTL
万方数据