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Paper Information

Journal:   JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TABRIZ)   WINTER 2009 , Volume 38 , Number 3 (CIVIL ENGINEERING); Page(s) 1 To 9.
 
Paper: 

BEHAVIOR OF DECK IN PRESTRESSED CANTILEVER BOX-GIRDER BRIDGES SUBJECTED TO VERTICAL GROUND ACCELERATION IN THE INTERACTION WITH THE TIME-DEPENDENT BEHAVIOUR OF MATERIALS

 
 
Author(s):  EBAD ELAHZADEH M.R., MALEK SH., AMINFAR M.H.
 
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Abstract: 

Vertical component of earthquake effects on bridges constructed near field of fault, and bridge decks that are flexible cannot be neglected. Especially, prestressed cantilever bridges, with regard to construction and completion phase and interaction of time dependent behavior of materials, such as concrete creep, which causes redistribution of internal forces and variable shift of stress and displacements of the bridge deck over time, leads the bridge deck to be sensitive to the effects of the vertical component of the ground acceleration. To study seismic behavior of prestressed cantilever box-girder bridges, a case study was carried out on a three-span continuous prestressed box-girder bridge. A three dimensional finite-element model is used for modeling and analysis of the balanced cantilever construction of the segmental bridges, including the effects of the load history and material time-dependent behavior with the use of nonlinear static staged construction analysis and under the action of the vertical component seismic excitation by means of nonlinear time-history analysis. Finally vulnerability of the decks of the prestressed cantilever box-girder bridges was investigated and some suggestions have been made to improve the seismic behavior of the bridge decks. 

 
Keyword(s): PRESTRESSED CANTILEVER BRIDGES, VERTICAL ACCELERATION OF EARTHQUAKE, TIME-DEPENDENT BEHAVIOR, NONLINEAR STATIC ANALYSIS, NONLINEAR DYNAMIC ANALYSIS
 
References: 
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