桥梁结构(梁、拱、索)通论

General Theory of Bridge Structure(Beam, Arch & Cable)

不论桥梁结构是何种形式,当跨径和作用在跨间的力确定后,跨间力与支点反力间形成的力矩以简支梁的弯矩图表示。此弯矩图是唯一确定的。不同的桥型以不同的抗力来平衡外力生成的弯矩,这就是桥梁受力的本质。梁、拱、索受力结构是相通的,由拱和索的对称性推演出丰富多彩的桥型结构。桥梁工程从来都是由需求推动的,材料、施工和设计是桥梁技术发展的三大支柱。

No matter what form of bridge structure is, when the span & the force acting on the span are determined, the moment formed between the inter span force & the reaction force at the fulcrum is expressed by the bending moment diagram of the simply supported beam. The bending moment diagram is uniquely determined. Different bridge types use different resistance forces to balance the bending moment generated by external forces. This is the nature of the bridge force. The stress-bearing structures of beams, arches & cables are interlinked, and various bridge structures are deduced from the symmetry of arch & cable. Bridge engineering has always been driven by demand. Materials, construction & design are the three pillars of bridge technology development.