摘要
某飞鸟式自平衡体系系杆拱桥在建成通车几年后,主桥西侧拱座出现了垂直于桥轴线、基本贯通整个拱座的竖向裂缝,且裂缝发展未趋稳定。为了查明裂缝产生的真正原因,详细普查了该桥拱座裂缝的分布情况,测量了拱座、拱肋和桥面的变形与沉降,检查了边墩支座以及伸缩缝的使用状况,并通过有限元法对该桥在各种荷载工况作用下的拱座的第一主应力分布情况进行了仿真分析。
Several years after a fly-bird type self-balanced tied arch bridge was open to traffic, the vertical cracks normal to the axial of the bridge, almost running through the whole arch seats occurred in west arch seats of the main bridge of the arch bridge, and also the propagation of the cracks does not tend to be stable. To find out the exact causes leading to the cracks, the distribution of the cracks is investigated carefully in an all-round way, the deformation and settlement of the arch seats, arch ribs and bridge deck are measured, and the service conditions of the bearings of the side piers and the expansion joints are checked. At the same time, the distribution of the first principle stress in the arch seats is simulated and analyzed by means of finite element method under various load cases of the bridge.
出处
《桥梁建设》
EI
CSCD
北大核心
2005年第3期8-11,共4页
Bridge Construction
关键词
系杆拱桥
拱座
裂缝
测量
有限元法
仿真分析
tied arch bridge
arch seat
crack
survey
finite element method
simulation analysis
