Applicability of pushover analysis-based seismic performance evaluation procedure for steel arch bridges

An investigation on the application of a capacity and demand prediction procedure based on a nonlinear pushover analysis and an equivalent single-degree-of-freedom (ESDOF) system approximation for seismic performance evaluation of steel arch bridges, as well as limitations of the pushover analysis is presented here. The procedure is applied to the transverse direction of two representative arch bridges with different spans for capacity and demand estimation. Displacement capacities are obtained by conducting pushover analysis until the ultimate state of the structure is reached, determined by a failure criterion proposed for thin-walled steel members governed by the local buckling-induced failure. Displacement demands under major earthquakes are estimated by ESDOF systems formulated using pushover analysis results. Capacities and demands are then compared with those from rigorous nonlinear time–history analyses on multi-degree-of-freedom (MDOF) models for verification and acceptable accuracy of the pushover analysis-based procedure is evidenced. Furthermore, applicability of the pushover analysis involving the fundamental mode only for seismic performance evaluation is extensively investigated considering the higher mode effect. A factor to account for higher mode contribution to seismic response is proposed and an applicable range of using the pushover analysis is quantitatively specified.

[1]  Helmut Krawinkler,et al.  PROS AND CONS OF A PUSHOVER ANALYSIS OF SEISMIC PERFORMANCE EVALUATION , 1998 .

[2]  Yi Zheng,et al.  Ductility Evaluation Procedure for Thin-Walled Steel Structures , 2000 .

[3]  Hanbin Ge,et al.  Seismic performance evaluation of steel arch bridges against major earthquakes. Part 1: dynamic analysis approach , 2004 .

[4]  Shigeki Unjoh,et al.  The Damage of Highway Bridges in the 1995 Hyogo-Ken Nanbu Earthquake and its Impact on Japanese Seismic Design , 1997 .

[5]  Tetsuya Nonaka,et al.  Dynamic Response of Half-Through Steel Arch Bridge Using Fiber Model , 2001 .

[6]  Ahmed Ghobarah,et al.  Performance-based design in earthquake engineering: state of development , 2001 .

[7]  Yi Zheng,et al.  DUCTILITY OF THIN-WALLED STEEL BOX STUB-COLUMNS , 2000 .

[8]  Anil K. Chopra,et al.  A modal pushover analysis procedure for estimating seismic demands for buildings , 2002 .

[9]  Hanbin Ge,et al.  Seismic performance evaluation of steel arch bridges against major earthquakes. Part 2: simplified verification procedure , 2004 .

[10]  Yi Zheng,et al.  SEISMIC DESIGN METHOD FOR THIN-WALLED STEEL FRAME STRUCTURES , 2001 .

[11]  Anil K. Chopra,et al.  Evaluation of modal pushover analysis using generic frames , 2003 .

[12]  Yi Zheng,et al.  Seismic response predictions of multi‐span steel bridges through pushover analysis , 2003 .

[13]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[14]  Sashi K. Kunnath,et al.  Seismic Performance and Retrofit Evaluation of Reinforced Concrete Structures , 1997 .

[15]  Mehdi Saiidi,et al.  SIMPLE NONLINEAR SEISMIC ANALYSIS OF R/C STRUCTURES , 1981 .

[16]  Peter Fajfar,et al.  THE N2 METHOD FOR THE SEISMIC DAMAGE ANALYSIS OF RC BUILDINGS , 1996 .