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Paper Information

Journal:   AMIRKABIR   FALL 2006- WINTER 2007 , Volume 17 , Number 65-C; Page(s) 1 To 11.
 
Paper: 

ANALYSIS OF THREE DIMENSIONAL MODEL OF SUSPENSION BRIDGES SUBJECTED TO ASYNCHRONOUS EXCITATION OF SUPPORTS

 
 
Author(s):  MOHAMMAD POUR HOSSIEN, AGHA KOUCHAK A.A.
 
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Abstract: 

Asynchronous excitation of supports is important in large structures such as dams, suspension bridges and cable-stayed bridges and lifelines. The effects of soil shear velocity and length of main span on structural response of suspension bridges are discussed in this study. Four bridges with different main span length are designed based on AASHTO-89 code. The designed bridges are subjected to ground motion records, which are chosen based on different shear velocities. Four shear velocities are used in this study and for each of them three records are considered. The response of the structure due to each group of records is the maximum response of these three records. ANSYS software Ver.7.0 is used for time history analysis of models and the total runs are 96. After applying the records to the models in main directions and performing time history analysis by taking into consideration large deflection, the response of structures is compared to each other for the cases of asynchronous and synchronous excitation. The results show that the effect of asybchronous excitation of supports is decreased with increasing the length of main span and soil shear wave velocity.

 
Keyword(s): SUSPENSION BRIDGES, ASYNCHRONOUS EXCITATION, SUPPORTS EXCITATION, RESPONSE OF 3D MODEL
 
References: 
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