青藏铁路拉萨河特大桥设计关键技术及试验研究

Key Techniques and Test Study for Design of Lhasa River Bridge on Qinghai-Tibet Railway

结合青藏铁路拉萨河特大桥工程,对梁拱组合体系的叠拱受力性能及连接方式、主桥五孔连续梁制动力分配、地震反应分析及工程抗震措施、车桥振动响应等关键技术和提高桥梁耐久性关键结构、构造试验进行研究,提出了研究的结论意见。

With reference to the project of Lhasa River Bridge on Qinghai-Tibet Railway, a series of key techniques for design of the type of the Bridge is studied, such as mechanical behaviour and connecting methods for dual arch ribs of the girder and arch hybrid structure system, braking load distribution, seismic response analysis, aseismatic measures and vehicle-bridge vibration response of the 5-span continuous girder of the main bridge, and the critical structures and structural tests for improving durability of the Bridge. Accordingly, the explicit conclusions related to the above-mentioned techniques are generalized.