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Dynamic Analysis of suspension bridges and Full Scale Testing

Open Journal of Civil Engineering 2012年第2期2卷 58-67页

作者： Serap Altin Kubilay Kaptan Semih S.Tezcan Bogazici University IstanbulTurkey Istanbul Aydin University IstanbulTurkey Civil Engineering Bogazici UniversityIstanbulTurkey

This paper is concerned with the earthquake analysis of suspension bridges, in which the effects of large deflections are taken into account. The first part of the study deals with an iteration scheme for the nonlinear static analysis of suspension bridges by means of tangent stiffness matrices. The concept of tangent stiffness matrix is then introduced in the frequency equation governing the free vibration of the system. At any equilibrium stage, the vibrations are assumed to take place tangent to the curve representing the force-deflection characteristics of the structure. The bridge is idealized as a three dimensional lumped mass system and subjected to three orthogonal components of earthquake ground motion producing horizontal, vertical and torsional oscillations. By this means a realistic appraisal is achieved for torsional response as well as for the other types of vibration. The modal response spectrum technique is applied to evaluate the seismic loading for the combination of these vibrations. Various numerical examples are introduced in order to demonstrate the method of analysis. The procedure described enables the designer to evaluate the nonlinear dynamic response of suspension bridges in a systematic manner.

关键词： suspension bridges Dynamic Analysis Tangent Stiffness Cable Structures Bridge Testing

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Evolution of suspension bridge structural systems,design theories,and shape-finding methods:A literature survey

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第2期11卷 225-244页

作者： Wenming Zhang Genmin Tian Yupeng Chen Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education Southeast UniversityNanjing 210096China State Key Laboratory of Safety Durability and Healthy Operation of Long Span BridgesSoutheast UniversityNanjing 210096China

Modern suspension bridges exhibit a trend of lighter structures,more diversified structural forms,and longer spans,the latter already exceeding two *** performance under dead and live loads depends on their structural and main cable systems,while cablesupported bridges especially rely on the design analysis and construction control of the main *** literary survey systematically analyzes the research progress and state-ofthe-art status quo in the structural systems and design theories of suspension bridges,focusing on the structural systems,main cable shape analyses,live load effect analyses,and emerging lucrative research *** than 100 reliable references have been surveyed.(1)Multi-span or multi-main cable schemes appeal to increasing attention,which may become a better choice in terms of structural systems in scenarios with extremely long spans and heavy *** cable layouts,such as spatial main cables and hybrid cable-stayed suspension systems have also become feasible approaches for enhancing structural stiffness.(2)The shape-finding analysis during the construction phase is more complex and has more essential factors than that of the completed bridge *** theories combining analytical methods and finite element methods are more suitable for the shape-finding analysis of complex cable systems than any single theory of the two,especially for novel cable systems.(3)The live load effect analysis methods based on traditional deflection theory or modified/improved deflection theories still have wide applications,but the refined theory of treating hangers as discrete members is also constantly developing,which is expected to provide new ideas for more complex structural analysis under the different types of live loads and their distribution forms.

关键词： suspension bridges Structural system Cable analysis Shape-finding analysis Construction control and calculation Live load effect

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STIFFNESS CHARACTERISTICS AND GEOMETRIC CONFIGURATIONS OF CABLE-SUPPORTED bridges

STIFFNESS CHARACTERISTICS AND GEOMETRIC CONFIGURATIONS OF CA...

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第一届交通运输工程国际学术会议

作者： YANG Decan Department of Road & Bridge Engineering Wuhan University of Technology Wuhan China 430063

The structural stiffness is the ability of a structure to resist the deformation. It is an integrated index and is restrained by many factors. Realising the different effects of these factors on structural stiffness can make the structural forms more reasonable and more optimum. The concept of structural geometric configuration stiffness was proposed in this paper. The structural general stiffness was considered being composed of physical stiffness, section stiffness and geometric configuration stiffness. The stiffness characteristics during the evolution of cable-supported bridges can be discussed by the concept of geometric configuration stiffness. The cable-stayed bridges have stronger stiffness than suspension bridges because of the stronger geometric configuration stiffness. The evolution of the structural forms, especially structural forms of bridges is in fact the changing process of the geometric configuration stiffness.

关键词： cable-supported bridges suspension bridges cable-stayed bridges stiffness characteristic, geometric configuration

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