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ANALYTICAL AND NUMERICAL STUDY ON FREE VERTICAL VIBRATION OF SHEAR-FLEXIBLE SUSPENSION BRIDGES

✍ Scribed by M.-Y. KIM; S.-D. KWON; N.-I. KIM

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
218 KB
Volume
238
Category
Article
ISSN
0022-460X

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✦ Synopsis

This study develops an analytical and numerical method for free vertical vibration of suspension bridges including shear deformation and rotary inertia. Under the assumption that the vertical displacement of the main cable is identical to that of the sti!ening girder, the di!erential equation of motion containing three new terms are derived based on Timoshenko's beam-column theory. The general analytical method for determining natural frequencies and mode shapes of hinged-and continuous-suspension bridges are presented. Special consideration is given is evaluating the natural frequency of simply supported three-span suspension bridges. For "nite element analysis, the suspension bridge element is developed by using Hermitian polynomials considering shear e!ects. The full truss model, in which both cable and truss girder is modelled by a truss element, is used in order to investigate the accuracy of the presented suspension bridge theory. Numerical examples are provided to illustrate the applicability and e!ectiveness of the present analytical and numerical method.

2000 Academic Press

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We find the title paper both useful and very interesting and we would like to congratulate the authors to their work [1]. On the other hand it is also the purpose of this letter to add some pertinent references which have been inadvertently omitted by the authors. Reference [2] deals with elastical