Advanced Steel Construction

Vol. 10, No. 4, pp. 372-384 (2014)


A SIMPLIFIED METHOD FOR SEISMIC PERFORMANCE EVALUATION OF STEEL BRIDGE PIERS WITH THIN-WALLED STIFFENED BOX SECTIONS

 

Jiandong Zhang1,2, Chun-Lin Wang1and Hanbin Ge1,3*

1 International Institute for Urban Systems Engineering, Southeast University, Sipailou 2,Nanjing 210096, China

2 Jiangsu Transportation Research Institute Co., Ltd, Nanjing, 210017, China

3 Department of Civil Engineering, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

Received: 28 September 2012; Revised: 22 December 2012; Accepted: 27 December 2012

DOI:10.18057/IJASC.2014.10.4.1

 

ABSTRACT:

This paper proposes a simplified seismic evaluation method for the thin-walled stiffened box steel pier to predict its strength and ductility. In this method, two modified bilinear material models for the fiber-beam element are suggested to include the local buckling of the base stiffened plate. An experiment validated a shell element based model, which was selected for comparison with the proposed fiber-beam based model. Twelve numerical cases were then simulated by the shell element based model and the fiber-beam element based model, respectively, and their accuracies were compared with each other. Numerical results showed that the proposed pushover method, employing the amended bilinear kinematic material model for the fiber beam element, is of good accuracy. If the maximum strength is taken as the ultimate point, the bilinear material model, replacing the yield point by the buckling stress, is recommended. If 95 percent of the maximum strength after the peak is regarded as the ultimate point, the elastic-perfectly plastic material model is suggested.

 

Keywords:Steel Bridge, Seismic Evaluation Method, Stiffened Box Section, Fiber Element

 

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