Author : Mostafa Kamel Metwally Zidan
CoAuthors : Tamer Mohamed Abdel Rahman,Mohamed Korashy
Source : International Organization of Scientific Research (IOSR) - Journal of Mechanical and Civil Engineering
Date of Publication : 11/2016
Abstract :
This research presents a comprehensive study to perform the seismic analysis of buildings using
Direct Displacement Based Method (DDBM), which is a viable and logical alternative to current force-based
code approaches. This method is based on a concept of designing structures to achieve a specified performance
limit state defined by strain or drift limits. The main objective of the paper is to examine analytically the use of
DDBM in seismic design of different types of structural systems (frame, wall, and dual wall-frame buildings)
and compare it with the traditional Force Based Design Method (FBDM). Using a developed Excel spread
sheets for DDBM procedure, a set of buildings with different heights (2, 4,6,8,10,12,14,16,18, and 20 stories)
and different structural systems (frame buildings, wall buildings, and dual wall-frame buildings) are analyzed
and the results are compared with those of (Force Based Design Method) FBDM modeled using computer
programs SAP and ETABS. This comparison proved that Direct Displacement Based Method is more reliable as
it is based on a secant stiffness (rather than initial stiffness) representation of structural response, using a level
of damping equivalent to the combined effects of elastic and hysteretic damping. This design method is
extremely simple to apply and is very successful in providing dependable and predictable seismic response.
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