摘要
以16 m跨径的T梁桥标准图为基础,按1∶4的缩尺比例,采用焊接钢板的连接方法设计了一座5片T梁桥模型.人为制造横向连接损伤,研究了带横向连接损伤的T梁桥模型极限承载力.试验结果表明:在横向连接损伤的情况下,其两侧梁各自暂时形成一个子系统.在跨中加载的情况下,各子系统绕着损伤横向连接发生约束扭转.并且这种约束扭转状况随着横向连接损伤程度的增加而越发明显.横向连接损伤对桥梁的破坏形式产生了极大的改变,对桥梁的极限承载力影响很大.
The effect of damaged transverse connection to prefabricated concrete T-beam bridges was studied through model experiment and finite element analysis in this paper. On the basis of standard drawing of 16 m T-beam bridge, one 4 m prefabricated concrete modal T-beam bridge by using of welding steel plate was designed. The transverse connection was then damaged artificially and the ultimate bearing capacity of this bridge model was investigated. Experiment results indicate that： When the transverse connection was damaged, the beam is temporarily divided into two subsystems. At this time if load is applied on mid-span, the subsystems will rotate around the damaged connection. More serious damage will produce at the conection, larger constraint torsion will occur in the beams. The damage mode of the bridge is changed greatly due to the transverse connection damage and ultimate bearing capacity is affected remarkably.
出处
《广西大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期144-149,共6页
Journal of Guangxi University（Natural Science Edition）
基金
国家西部交通建设科技项目(200531822316)
国家西部交通建设科技项目(200631822302-04)
关键词
桥梁工程
混凝土T梁桥
横向连接损伤
模型试验
极限承载力
bridge engineering
T-beam bridge
damaged transverse connection
model experiment
ultimate bearing capacity
