EFFECTIVE PARAMETERS A SEISMIC PERFORMANCE OF SKEWED BRIDGES USING A SIMPLIFIED MODEL

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Asad Pour M.; KALANTARI A.

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Journal Paper

Paper Information

Journal: Sharif Journal of Civil Engineering Year:2020 | Volume:36-2 | Issue:1/1 Page(s): 21-32

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Title

EFFECTIVE PARAMETERS A SEISMIC PERFORMANCE OF SKEWED BRIDGES USING A SIMPLIFIED MODEL

Author(s)

Asad Pour M. | KALANTARI A. | Issue Writer Certificate

Keywords

Skewed highway bridge

simplied model of skewed bridge

dynamic analysis

rotation modes

natural frequencies

Abstract

This study investigates the behavior of skewed bridges based on the vulnerabilities that these structures demon-strate while seismic excitation is of great importance. Identifying the parameters a ecting seismic vulnerability enables the designer of a skewed bridge to consider a proper understanding of various aspects of selecting the geometry and distribution of sti ening factors in a skewed bridge in the design process. Based on the geometric conditions, skewed bridges are coupled with mode shapes and signi cant rotation around the vertical axis is observed in certain conditions in earthquakes. In order to investigate and acquire the parameters a ecting the domination of rotation modes in these structures, the present study employed a 3D model with three degrees of freedom whose accuracy had already been con rmed. Results of the numerical calculations revealed that effective parameters in the domination of rotation mode include the ratio of transverse sti ness to longitudinal sti ness of the columns, the ratio of length of the deck to its width, the ratio of the entire bridge mass to the mass of the pavement, the ratio of torsional sti ness of each column to the multiplication of longitudinal sti-ness of the bridge by squared width of the bridge deck, the ratio of columns' eccentricity from the center of the mass to the width of the deck and skewedness. For further numerical calculations, a nite element model of the Foothill Boulevard Skewed Bridge was created, and a time history analysis was conducted on it. The results of the analyses of this nite element model were investigated and generalized to other skewed bridges.

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APA: Copy

Asad Pour, M., & KALANTARI, A.. (2020). EFFECTIVE PARAMETERS A SEISMIC PERFORMANCE OF SKEWED BRIDGES USING A SIMPLIFIED MODEL. SHARIF: CIVIL ENINEERING, 36-2(1/1 ), 21-32. SID. https://sid.ir/paper/966839/en

Vancouver: Copy

Asad Pour M., KALANTARI A.. EFFECTIVE PARAMETERS A SEISMIC PERFORMANCE OF SKEWED BRIDGES USING A SIMPLIFIED MODEL. SHARIF: CIVIL ENINEERING[Internet]. 2020;36-2(1/1 ):21-32. Available from: https://sid.ir/paper/966839/en

IEEE: Copy

M. Asad Pour, and A. KALANTARI, “EFFECTIVE PARAMETERS A SEISMIC PERFORMANCE OF SKEWED BRIDGES USING A SIMPLIFIED MODEL,” SHARIF: CIVIL ENINEERING, vol. 36-2, no. 1/1 , pp. 21–32, 2020, [Online]. Available: https://sid.ir/paper/966839/en

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