摘要
为研究三跨独柱连续曲线梁桥的抗倾覆能力,基于结构倾覆的力学原理并根据桥梁倾覆轴选取原则,推导了微弯桥与弯桥的倾覆轴选取临界方程,比较了弯桥中两类倾覆轴下的抗倾覆稳定性,对三跨独柱连续曲线梁桥的抗倾覆稳定系数进行了验算,并与规范公式计算值进行对比。计算结果表明:在选取弯桥倾覆轴时,根据两中墩支座连线作为倾覆轴进行抗倾覆验算的结果更安全;三跨独柱连续曲线梁桥的抗倾覆稳定系数随曲率半径增大呈现先减小后增大的趋势;对于微弯桥,理论计算值比规范计算值更大;对于弯桥,两者基本一致。
To study the stability of three-span continuous curved girder bridge with single column pier, the overturning axis critical equation of slightly curved bridge and curved bridge is deduced based on the mechanics principle of structure overturning and the selection principle of the bridge overturning axis. The anti-overturning stabilities of curved bridge under two types of overturning axis are compared. The anti-overturning stability coefficient of three-span continuous curved girder bridge with single column pier was checked and compared with the value calculated from standard formula. Calculation results show that, choosing the connecting line of the bearings of two middle piers as the overturning axis, the check is safer. The anti-overturning stability coefficient of the three-span continuous curved girder bridge with single column pier first decreases and then increases with the increase in the curvature radius. For slightly curved bridge, the theoretical calculated value is greater than the value calculated from the standard formula. For curved bridge, both calculated values are basically identical.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2018年第1期113-120,共8页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51478203)
吉林省科技厅项目(20140520135H)
中央高校基本科研业务费专项资金项目
关键词
桥梁工程
独柱墩
曲线梁桥
抗倾覆稳定性
曲率半径
圆心角
bridge engineering
single column pier
curved girder bridge
anti-overturning stability
radius of curvature
central angle
