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http://dx.doi.org/10.4334/JKCI.2011.23.5.667

Analysis and Prediction for Abutment Behavior of Prestressed Concrete Girder Integral Abutment Bridges  

Kim, Woo-Seok (Dept. of Civil Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.23, no.5, 2011 , pp. 667-674 More about this Journal
Abstract
This paper discusses the analysis method of prestressed concrete girder integral abutment bridges for a 75-year bridge life and the development of prediction models for abutment displacements under thermal loading due to annual temperature fluctuation and time-dependent loading. The developed nonlinear numerical modeling methodologies considered soil-structure interaction between supporting piles and surrounding soils and between abutment and backfills. Material nonlinearity was also considered to simulate differential rotation in construction joints between abutment and backwall. Based on the numerical modeling methodologies, a parametric study of 243 analysis cases, considering five parameters: (1) thermal expansion coefficient, (2) bridge length, (3) backfill height, (4) backfill stiffness, and (5) pile soil stiffness, was performed to established prediction models for abutment displacements over a bridge life. The parametric study results revealed that thermal expansion coefficient, bridge length, and pile-soil stiffness significantly influenced the abutment displacement. Bridge length parameter significantly influenced the abutment top displacement at the centroid of the superstructure, which is similar to the free expansion analysis results. Developed prediction model can be used for a preliminary design of integral abutment bridges.
Keywords
integral abutment; bridge; thermal load; time-dependent; soil-structure interaction;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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