吉首大学学报（自然科学版）2025，Vol.46Issue(2)：51-57,7.DOI:10.13438/j.cnki.jdzk.2025.02.007
车辆荷载作用下钢混组合梁的疲劳性能
Fatigue Performance of Steel-Concrete Composite Beams Under Vehicle Loads
王建省 1张建猛 1贾玉梦1
作者信息
- 1. 北方工业大学土木工程学院,北京 100144
- 折叠
摘要
Abstract
In order to more accurately calculate the fatigue damage and fatigue life of steel-concrete com-posite beam under standard vehicle load,the steel beam components of a large-span steel-concrete composite beam suspension bridge were taken as the research object.Based on the S-N curve and linear fatigue damage theory,a standard segment model was established.Accordingly,the welding position of the secondary longitudinal beam was identified as the focus fatigue point,and the stress time course cal-culation was done for the point.The results showed that when the vehicle mass increases from 50 t to 100 t,the amount of fatigue damage will increase by more than 5 times in the same period of time,and the in-crease in the vehicle mass will reduce the fatigue life of the bridge structure.The fatigue damage of bridge structures increases with the increase of vehicle speed.The increase rate of fatigue damage is grea-ter at low speeds,and the increase rate of fatigue damage slows down at high speeds.关键词
钢混组合梁/车辆荷载/疲劳Key words
steel-concrete composite beam/vehicle load/fatigue分类
交通工程引用本文复制引用
王建省,张建猛,贾玉梦..车辆荷载作用下钢混组合梁的疲劳性能[J].吉首大学学报（自然科学版）,2025,46(2):51-57,7.
