Dynamic Response of Rcc and Composite Structure with Brb Frame Subjected To Seismic and Temperature Load

Syeda Qurratul Aien Najia.et al. Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 6, Issue 4, (Part - 4) April 2016, pp.79-83
www.ijera.com 79|P a g e
Dynamic Response of Rcc and Composite Structure with Brb
Frame Subjected To Seismic and Temperature Load
Syeda Qurratul Aien Najia1
, Hashim Mohiuddin2
,Sumaiya Fatima3
1
Asst.Professor, Department Of Civil Engineering, Deccan College of Engg. & Tech., Hyderabad
2
Professor, Department Of Civil Engineering, Deccan College of Engg.& Tech., Hyderabad
3
Asst. Professor, Dept. Of Civil Engineering, Muffakhamjah College Of Engg.& Tech., Hyderabad
ABSTRACT
Concrete structures impart more seismic weight and less deflection whereas Steel structures instruct more
deflections and ductility to the structure, which is beneficial in resisting earthquake forces. Composite
Construction combines the better properties of both steel and concrete. Buckling restrained braced frames
(BRBFs) are primarily used as seismic-force resisting systems for buildings in seismically-active regions.The
objective of the present work is to compare a twenty storied RCC and composite framed structure with BRB
frame subjected to Seismic and different Temperatureloadings using Non-Linear Time History Analysis. Three
dimensional modeling and analysis of the structure is carried out with the help of SAP-2000 v16 software. It is
observed that the storey displacements were decreased by 36% for twenty storey RCC building and for
composite buildings it was decreased by 45% for twenty storeys suggesting the effectiveness of Buckling
restrained brace frame. The overall results suggested that BRB were excellent seismic control device for
composite building as the roof displacement is reduced by 40% but whereas for RCC it is reduced only by 25%.
For Seismic prone areas composite building with BRB frame is more effective. Under Temperature loading
RCC building is more effective than composite structure.
Keywords: RCC Structure, Concrete Structure, BRB Frame, Seismic and Temperature load, SAP.
I. INTRODUCTION
A composite building with steel and the
concrete sections would resist the external loading
by interacting together by bond and friction.
Supplementary reinforcement in the concrete
encasement prevents excessive spalling of concrete
both under normal load and fire conditions.
A buckling-restrained brace, or an
unbounded brace, is a bracing member consisting
of a steel core plate or another section encased in a
concrete-filled steel tube over its length as shown
in Figure.During an earthquake, seismic ground
forces have the effect of applying lateral loads to
buildings. If these loads are strong enough, they
have the ability to damage the structure, leading to
an economic loss or even loss of human life. In
order to prevent both of these from happening, it is
crucial to have buildings that are able to withstand
seismic loads they may be subjected to. Structures
fitted with BRBs are likely to absorb even more
energy as both diagonal braces (in tension and
compression) are resisting the lateral loads.
Figure1. Buckling Restrained Brace cross sectional
view
The objectives of the present study are:
1. To study the Seismic behavior of RCC and
Composite building using the Non-linear time
history analysis with and without BRB Frame.
2. To find the effect of Temperature load on RCC
and Composite building withBRB Frame.
3. To illustrate the effects ofBRB Frame on the
response of the High-rise Buildings.
II. STUDY AREAFIGURE
Bhuj is a place located in Gujarat which is
a High intensity earthquake zone of zone factor
0.36 which comes under the Zone-V according to
the classification of seismic zones by IS 1893-2002
part-1.The records are defined for acceleration
points with respect to time interval of 0.005
seconds. The acceleration record has units of
m/sec2
and has total number of 26,706 acceleration
data.Frame temperature load is defined for normal
as well as for high temperature(280
C and 4000
C
respectively).
RESEARCH ARTICLE OPEN ACCESS

Figure2.Bhuj Earthquake
III. MATERIAL AND METHOD
SAP 2000 is integrated software for
analysis and design of structures. Using SAP
nonlinear time history analysis is performed on the
proposed building. Models are prepared by using
assumptions; input data is feed into the SAP to
analyze the structural parameters such as base
shear, base moment, lateral displacement, storey
drift, time period, bending moment and axial
force.The following methodological approach is
used for evaluating the Dynamic Response of RCC
& Composite Structures using BRB frame.
1. Identification of study area
2. Collection of the data
3. Analysis and Results
4. Conclusions.
Figure 3. Application of SAP2000 API
S.No Description Information Remarks
1. Building height-20
storey
60.0 m Including
the
foundation
level
2. Number of
basements below
ground
Zero ----
3. Open ground
storey
Yes ----
4. Special hazards None ----
5. Type of building Regular
Space
frames
IS
1893:2002
Clause 7.1
6. Horizontal floor
system
Beams and
slabs
----
7. Software used SAP 2000
V16
----
Table 1. General data collection and condition
assessment of building
Table2. Preliminary data considered in the analysis
of the framed structure for seismic load
Table3.Preliminary data considered for
Temperature load
Figure 4.Defining Materials
Figure 5. Defining Properties

Figu
re6.Defining beam
Figure7. Defining Column
Figure8.Selecting Type of Brace
Figure9. BRB properties
Figure10.BRB in X-direction
Figure11. BRB in Y-direction
Figure12.Showing 3D view of Model with BRB
Figure13.Comparison of Storey Displacement
14. Comparison of Storey Drift with& without
BRB frame with & without BRB frame

Figure15.Comparison of Axial force
F
igure16. Comparison of Moment
Figure 17.Moment of RCC and Composite building
Figure 18.Displacement of RCC and composite
Under Normal Temperature building under High
Temperature
Figure19. Base shear comparison for twenty storied
Figure20. Base moment comparison for twenty
storied RCC and Composite building with
BRBFRCCand Composite building with BRBF
IV. CONCLUSIONS
1. The storey displacements were decreased by
36% for RCC building and decreased by 45%
for composite buildings suggesting the
effectiveness of Buckling restrained brace
frame.
2. The overall results suggested that BRB were
excellent seismic control device for composite

building as the roof displacement is reduced by
40% but whereas for RCC it is reduced only by
25%. It suggests that they are excellent for
composite structure.
3. Lateral displacement and storey drifts were more
in composite building model of fixed base with
BRB frame but they are under permissible
limits as compared with RCC building model
of fixed base with BRB frame.
4. For Seismic prone areas composite building with
BRB frame is more effective.
5. Under Normal and High Temperature loading,
displacement and Storey drift of RCC building
with Buckling restrained brace frame is less as
compared to composite building.
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