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A comparative study of seismic provisions between International Building Code 2003 and Uniform Building Code 1997

Wenshen Pong1, Zu-Hsu Lee2 and Anson Lee1

1. School of Engineering, San Francisco State University, San Francisco, CA 94132, USA

2. Department of Management and Information Systems, Montclair State University, Montclair, NJ 07043, USA

Abstract: This study focuses on the comparison of the Uniform Building Code (UBC) 1997 and International Building Code (IBC) 2003 in relation to the seismic design and analysis of special steel moment resisting frame buildings (SMRF). This paper formulates a numerical study of a steel SMRF building, studied in four different situations, namely: as an office building in San Francisco; as an office building in Sacramento; as an essential facility in San Francisco, and as an essential facility in Sacramento. The analytical results of the model buildings are then compared and analyzed taking note of any significant differences. This case study explores variations in the results obtained using the two codes, particularly the design base shear and drift ratios as they relate to different locations and occupancy use. This study also proves that IBC 2003 is more stringent for the redundancy factor under design category E for the SMRF building, and drift limits for essential facilities.

Keywords: Uniform Building Code 1997; International Building Code 2003; building periods; special moment resisting frame; redundancy factor