Design Of Reinforced Concrete Buildings
According To The New NEHRP Provisions
Author(s)
O. A. Mohamed & P. Khamwan
Abstract
This paper examines the seismic analysis and design requirements for earthquake
resistant reinforced concrete buildings according to the recent NEHRP
recommended provisions, also known as FEMA 450. To demonstrate the
implementation of the NEHRP provisions, a case study reinforced concrete
building is analyzed and designed. A number of key modeling and design
considerations are examined such as: (1) the effects of upper and lower limits
imposed by the provisions on design fundamental period; (2) the variation of
drift along the height of the building in a structure that contains a dual lateral
force resisting system in one direction and a moment resisting frame in another
direction, compared to the limiting NEHRP value; (3) comparison of the
torsional irregularity limit in the provisions to finite element computations for
dual lateral resisting system as well as special moment resisting frame system;
(4) the effects on structural response of the interaction of shear-wall and special
moment resisting concrete frames.
Keywords: seismic design, NEHRP provisions, dual systems, torsional
irregularity.
1 Introduction
The Building Seismic Safety Council (BSSC) of The National Institute of
Building Science (NIBS) established the National Earthquake Hazard Reduction
Program (NEHRP) more than 25 years ago with the objective of minimizing
earthquake hazards and the damage and injury they might cause. The United
States Federal Emergency Management Agency (FEMA) has been supporting
BSSC through a number of contracts to publish and update documents, such as
Keywords
seismic design, NEHRP provisions, dual systems, torsional
irregularity.
Related Book
Other papers in this volume
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