带中吊杆下承式系杆拱桥稳定性研究  

Stability Analysis of Through Tied-arch Bridge with Middle Boom

作　　者：田伟雄[1] 

机构地区：[1]南京市市政设计研究院有限责任公司,江苏南京210008

出　　处：《中国市政工程》2007年第1期28-30,共3页China Municipal Engineering

摘　　要：带中吊杆的下承式系杆拱桥存在着稳定方面的脆弱性。对京津二通道某带中吊杆下承式系杆拱桥进行了成桥状态稳定性分析。介绍了恒载和活载作用下的第一类稳定分析和第二类稳定分析,并进行了对比。通过分析说明,在实际工程中,材料非线性和几何非线性等非线性因素的影响是很大的。由此得出该类型桥梁稳定问题主要体现在横撑和拱肋上的结论,具有参考意义。Through tied-arch bridge with middle boom lacked the stability. A Through tied-arch bridge with middle boom of the second path of Jingjin was made a stability analysis under the bridging condition. The stability analysis on the first type and the second type under the dead and the live load were introduced, meanwhile, the two types were compared. And the analysis showed that material nonlinearity and geometric linearity had great effect on the practical projects. The result was full of meaning value, that was block bridging and arch rib influencing the stability of this kind bridge.

关 键 词：下承式拱桥 横撑 中吊杆 第一类稳定分析 第二类稳定分析 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]