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Calculation of the modal parameters of a suspension bridge

version 3.1 (36.8 KB) by E. Cheynet
The eigen-frequencies and modes shapes of a suspension bridge are calculated on a simple way

4 Downloads

Updated 03 Mar 2019

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The book of E.N. Strømmen "Structural Dynamics" showed an example of an analytical computation of the eigenmodes and mode-shapes of a single-span suspension bridge. This Matlab script is a transcription of this example into a simple function. It can further be applied for over type of single-span suspension bridge.
2 files are provided:
- eigenBridge is a function that computes the mode shapes and eigenfrequencies of the suspension bridge
- Example: is an application of this function (see the example)
All credits for the background theory go to [1] and [2]. Any improvements, or corrections are warmly welcomed
[1] Sigbjørnsson, R., Hjorth-Hansen, E.: Along wind response of suspension bridges with special reference to stiffening by horizontal cables. Engineering Structures 3, 27–37 (1981)
[2] Structural Dynamics, Einar N Strømmen, Springer International Publishing, 2013. ISBN: 3319018019, 9783319018010

Cite As

E. Cheynet (2019). Calculation of the modal parameters of a suspension bridge (https://www.mathworks.com/matlabcentral/fileexchange/51815-calculation-of-the-modal-parameters-of-a-suspension-bridge), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (1)

Updates

3.1

Added the project website

3.0.0.0

Title

3.0.0.0

Title

3.0.0.0

typo

3.0.0.0

The lateral mode shapes of the deck include now properly the influence of the cable motion

2.0.0.0

-Example file provided + many simplifications

1.2.0.0

- possibility to use a different young modulus for main cables

1.1.0.0

- separation into more modules for sake of clarity (new matlab file "ExampleBridge.m" included)
- For those interested only in one degree of freedom, the inputs have been sorted on a more visible way.

1.0.0.0

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1.0.0.0

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1.0.0.0

- typo and description

MATLAB Release Compatibility
Created with R2012b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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