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Assessment of ShearWall Quantity in Seismic-Resistant
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Design of Reinforced Concrete BuildingsAbstract It is common to design reinforced concrete build-
ings with shear walls to resist seismic loads. In the present
study, an easy to apply analytical method has been proposed
to determine the amount of shear walls necessary to make
reinforced concrete buildings seismic-resistant against mod-
erate to severe earthquakes. The method is based on the fol-
lowing design strategy: (1) The total design base shear must
be resisted by shear walls; (2) Equal amounts of shear walls
must be placed in both orthogonal directions of the struc-
ture; and (3) The moment resisting frame elements, which
are beams and columns, must independently be able to resist
25 % of the total design base shear. For such a system, the
ratio of the total area of shear walls to the area of the floor
plan has been obtained by equating the total design base
shear to the total shear resistance provided by all shear walls
in one direction. Because seismic action may occur in any
direction, equal amount of shear walls is recommended to
provide in the two orthogonal directions. A procedure is also
presented to check the stiffness (or storey drift) requirement
for the determined amount of shear walls. The complete ana-
lytical procedure was demonstrated by implementing it on a
10 storey 3-D reinforced concrete building.6856
Keywords Shear wall · Earthquake · Storey drift ·
Dual system1 Introduction
To be able to resist a major earthquake, a reinforced concrete
(RC) building must possess adequate strength, stiffness and
ductility. These three requirements are generally satisfied by
properly placing the required amount of shear walls in RC
buildings. Observations and evaluations of past earthquake
damages show that buildings with shear walls, despite inade-
quate amount and poor placement in the building plan, resistthe seismic forces efficiently and generally do not collapse
under moderate to severe earthquakes. It is due to the reason
that almost all the seismic codes recommend the employment
of shear walls in RC buildings. In the recent past, substantial
research has been carried out on seismic response of RC
buildings with shear walls.
Kim et al. [1] proposed an efficient method for a three-
dimensional analysis of a high-rise building structure with
shear walls. Three-dimensional super elements for walls and
floor slabs were developed and a substructure was formed by
assembling the super elements to reduce the time required
for the modeling and analysis. Static and dynamic analyses
of example structures with various types of opening were
performed to verify the efficiency and accuracy of the pro-
posed method. They concluded that the proposed method is
very useful for an efficient and accurate analysis of high-rise
building structures with significantly reduced computational
time and memory.
Aksogan et al. [2] studied the forced vibration analysis of a
multi-bay coupled shear wall on an elastic foundation. Their
analysis considers shear walls with a finite number of stiff-
ening beams, the properties of which vary from span to span
and/or from section to section in the vertical direction. They
employed continuous connection method (CCM) to find the
structure stiffness matrix. The structure mass matrix was
foundwith the lumpedmass assumption.Atime-history anal-
ysis was carried out using the Newmark numerical integra-
tionmethod to obtain the response. The response obtained by
the present method was then compared with those obtained
using SAP2000 structural analysis program. They found a
good match between the results of present method and the