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。通过不同的钢板连接方式,将横隔梁横向连接损伤对T桥梁桥承载能力的影响进行了试验和有限元分析,研究了不同损伤工况对T梁桥荷载横向分配的影响。结果表明,在保持横隔梁连接的情况下,翼缘连接的强弱对荷载横向分配的影响很小;横向连接损伤只对相邻梁的荷载横向分配产生较大的影响,对其余梁的影响很弱;当单个横向连接除端横隔梁外全部损伤时,由于其他横隔梁的有利作用,其荷载分配并没有退化到翼缘连接决定的状态。只有当某片梁两侧的横隔梁同时损伤时,这片梁的荷载横向分布才退化到由翼缘连接决定的状态。
The effect of damaged transverse connection of diaphragm beams on the bearing capacity of prefabricated concrete T-beam bridges was studied through model experiment and finite element analysis. On the basis of standard drawing of 16 m T-beam bridge, a prefabricated concrete T-beam bridge model on the scale of 1 to 4 by using of welding steel plate was designed. The impacts of different condition on transverse load distribution were discussed. The result beams are shows that （1） flange connection has little impact on the transverse load distribution when the diaphragm connected reliably; （2） the damage of transverse connections has much influence on the transverse load distribution of adjacent girders but it has little effect on the girders apart from them; （3） if a certain transverse connection is damaged entirely except for that of the end diaphragm beams, the load distribution would not degenerate to the conditions determined by the flange conneetion because of the advantageous effects of the other diaphragm beams; （4） only when the bilateral diaphragms of one beam are damaged at the same time, the lateral load distribution will degenerate to the conditions determined by the flange connection.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第6期79-83,共5页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技资助项目(200531822316)
关键词
桥梁工程
损伤评价
模型试验
T梁桥
横向连接
bridge engineering
damage assessment
model experiment
T-beam bridge
transverse connection
