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Dimensionless Free Vibration Analysis of Suspension Bridges Considering Hanger Extensibility and Various Girder Types

 Dimensionless Free Vibration Analysis of Suspension Bridges Considering Hanger Extensibility and Various Girder Types
Author(s): ,
Presented at IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016, published in , pp. 839-842
DOI: 10.2749/222137816819259220
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In this paper, free vibration analyses with an improved continuum model for three-span suspension bridges are performed to study the effects of hanger extensibility on free vertical vibrations. The...
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Bibliographic Details

Author(s):

Medium: conference paper
Language(s): English
Conference: IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016
Published in:
Page(s): 839-842 Total no. of pages: 4
Page(s): 839-842
Total no. of pages: 4
Year: 2016
DOI: 10.2749/222137816819259220
Abstract:

In this paper, free vibration analyses with an improved continuum model for three-span suspension bridges are performed to study the effects of hanger extensibility on free vertical vibrations. The improved model can consider extensible hangers as well as various girder types such as hinged, continuous, and floating girders. To derive the equations of motion for this model, the coupled differential equations for the vertical deflections of the main cable and girder are presented. The Galerkin’s method with the shape functions for the main cable and girder is introduced into the differential equations, and it leads the equations to a matrix form. The natural frequencies of a three-span suspension bridge are evaluated from the equations with the six dimensionless parameters. In the parametric analyses, the effect of the hanger extensibility is observed.

Keywords:
suspension bridge continuum model free vibration Extensible hanger Girder type

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