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本文叙述了吊桥的发展历史和现代吊桥的发展趋势。讨论了现代吊桥的静动力特性,阐述了吊桥结构的非线性的基本概念,挠度对结构内力的影响,并就悬索的垂跨比,恒载集度和活载,加劲梁边界条件和中央扣等对悬索结构体系的静力特性影响作了分折。还讨论了吊桥的自由振动和风振特性。并根据其力学特性对吊桥结构的总体布置作了较详细的阐述,最后列举了上海宁浦悬索大桥方案的实例,为吊桥设计提供了基础资料和经验。
This article describes the development history of suspension bridge and the development trend of modern suspension bridge. The static and dynamic characteristics of the modern suspension bridge are discussed. The basic concept of the nonlinearity of the suspension bridge and the influence of the deflection on the internal force of the suspension bridge are expounded. The vertical span ratio, permanent load concentration and live load, Buckling and other structural characteristics of the suspension system of static characteristics made a break. Also discussed the suspension bridge free vibration and wind vibration characteristics. According to its mechanical characteristics, the general arrangement of suspension bridge structure is described in detail. Finally, an example of the scheme of Shanghai-Nanjing-Shanghai suspension bridge suspension bridge is provided, which provides the basic information and experience for suspension bridge design.