COMPARISON OF SEISMIC PROVISIONS OF EBCS 8 AND CURRENT MAJOR BUILDING CODES PERTINENT TO THE EQUIVALENT STATIC FORCE ANALYSIS

Abstract

A comparison of seismic ptovisions having
relevance to the Equivalent Static Force (ESF)
method of analysis according to current major
building codys worldwide is presen!ed. The codes
compared include the latest two editions of the
Uniform Building Code (UBC 94 and UBC 97), the
International Building Code (IBC 2000), the
European Prestandard (Eurocode 8, 1998), and the
Ethiopian Building Code Standard (EBCS 8, 1995).
The comparison is mady on the basis of the
specified base shear coefficient, the vertical
distribution of the base shear, the story shear and
overturning moment, the considerations for torsion,
P-delta effect, and the limitations on the story drift.
Substantial differences are observed among the
codes and even within different editions. of~ code,
a good example being the UBC series. It is also
shown that the most recent American codes like
USC 97 and IBC 2000 exhibited drastic changes in
the definition of the base shear coefficient and in
other pertinent regulations as compared to the
classical forms familiar to most users