大跨度刚梁柔拱组合体系桥梁设计关键问题研究

Research on Key Problems in the Design of Large-span Rigid Beam Flexible Arch Composite System Bridge

大跨度刚梁柔拱组合体系桥梁是一种具有较好经济效益和结构性能的新型桥梁结构形式。文章针对不同荷载情况和结构特点,提出了相应的设计方法,以保障桥梁结构的安全性和可靠性,并通过对湖北省某梁式桥进行深入研究,得到左第二跨主梁右端支座与左边跨主梁跨中之间的轴力差值最大,反应谱差值为4688.3 N,时程相差4930.4 N,验证了大跨度刚梁柔拱组合体系桥梁的设计方法和理论在实际工程应用中的可行性和优越性。文章研究成果可为大跨度刚梁柔拱组合体系桥梁的设计和应用提供有益参考。

Large-span rigid beam flexible arch composite bridge is a new type of bridge structure with good economic benefits and structural performance.According to different load conditions and structural characteristics,the corresponding design methods are proposed to ensure the safety and reliability of the bridge structure.Through in�depth study of a beam bridge in Hubei Province,it is found that the axial force difference between the right end bearing of the left second span main beam and the mid-span of the left span main beam is the largest,with a response spectrum difference of 4688.3 N and a time history difference of 4930.4 N,which verifies the feasibility and superiority of the design method and theory of large-span rigid beam flexible arch composite system bridge in practical engineering application.The research results of this paper can provide useful reference for the design and application of large-span rigid beam flexible arch composite bridges.