International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 02 Issue: 07 | Oct-2015 www.irjet.net p-ISSN: 2395-0072
© 2015, IRJET ISO 9001:2008 Certified Journal Page 728
Shear Demand of Exterior Beam Column Joint using STAAD-Pro
Rupali R. Bhoir
[1]
, Prof . V. G. Sayagavi
[2]
,Prof. N.G.Gore
[3]
Prof. P. J. Salunkhe
[4]
1
PG Student, Department of civil engineering, MGM’s College of Engineering & Technology, Maharashtra, India
234
Professor, Department of civil engineering, MGM’s College of Engineering & Technology, Maharashtra
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Abstract: Exterior Beam-Column joints are very
important members in ductile detailing and are more
prone to damage during earthquake. Due to complex
behaviour of joint core, calculation of joint shear demand
becomes critical. So confinement is provided at such joints.
But this confinement leads to congestion at joints. Here in
this paper an attempt is made to understand the joint core
behaviour and to determine the joint shear demand by
using STAAD-Pro Software V8i. For this purpose 2D
framed mid and low rise buildings of earthquake zone V
are considered with varying dimensional parameters.
These models are modelled and designed in STAAD-Pro
Software V8i with Limit State Design Method as per IS
456:2000 and detailed according to IS 13920:1993. The
joint shear demand is calculated as per ACI 352-02. From
those models joint shear demand is calculated and effects
of various parameters on joint shear demand is briefly
discussed in conclusions which can be used for the further
studies.
Keywords – Exterior Beam-Column joints, ductile
detailing, and joint shear demand, STAAD-Pro
Software V8i.
Introduction
The portion of the column where beam is use to join it is
called beam-column joint. Beam column joints are
classified into three types based on the number of beams
ending into the column
i) Interior Beam-Column joints
ii) Exterior Beam-Column joints
iii) Corner Beam-Column joints
Fig: 1 Types of Beam-Column Joints
(ref: ACI 352-02)
Beam-column joint is subjected to very high shear forces
due to pulling of top rebar and pushing of bottom rebar’s
or vice versa in the concrete structure especially during
the earthquake loading. These very high shear force
leads to the brittle damage, which can’t be accepted in
the earthquake resistant building which has to be ductile
in nature to deal with unseen forces.
To prevent the damage due to joint shear failure
they come up with idea of joint confining with the rebar.
Confining the Beam-column joints isn’t so easy because
there are already rebar coming from three directions.
With the extra provision as per the present codes
confining stirrups leads to the problem of the congestion
as shown in the Fig. 2.