Analysis For Retrofitting Of An Existing Failed RC Column Using FEM Software’s

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
© 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 491
Analysis For Retrofitting Of An Existing Failed RC Column Using FEM
Software’s
Miss. Vaishali Vijay Rokade 1 Prof. S. S. Mane2
Student, M.E, Dept. of Civil Engineering, Padmabhooshan Vasantraodada Patil Institute of Technology Sangli -
Tasgaon Rd, Budhgaon.1
Professor, Dept. of Civil Engineering, Padmabhooshan Vasantraodada Patil Institute of Technology Sangli -
Tasgaon Rd, Budhgaon2
-----------------------------------------------------------------------***-------------------------------------------------------------------
Abstract— Making adjustments to an existing
structure to safeguard it from flooding or other risks such
as high winds and earthquakes is known as retrofit. You've
already seen examples of these changes, and you'll learn
more about them in the future chapters. However, you may
be wondering why retrofitting is so important. Building
structures can be damaged for a variety of reasons,
including earthquakes, cyclones, explosions, and so on.
This type of loading causes the shape to pre-collapse or
causes substantial damage to it. The structure can be
retrofitted in the event of minor damage. A search of the
existing literature indicated that there are numerous
retrofitting approaches. The investigation is being
conducted for the behaviour of ground floor R.C frame G+2
buildings. Assumed 3 m floor height. In addition, the
attributes of the frame structure are defined. ETABS
software is used to make models. Different types of loads
are taken into account. For static behaviour, the building's
dead load per IS 875 Part 1 and live load per IS 875 Part III
are taken into account.
Keyword: RCC, Retrofitting technique, ETABS, IS456,
column failure, ANSYS
1. INTRODUCTION
An existing structure can be retrofitted to protect it from
floods and other risks like high winds and earthquakes by
making alterations to it. A number of these modifications
will be introduced in the coming chapters. However, you
may be wondering why retrofitting is so important in the
first instance. Why aren't homes and other structures
created in a way that they don't need to be altered? For
one thing, advancements in construction technology, as
well as our understanding of risks and their effects on
dwellings, are continuously occurring. Houses built
decades ago, when nothing was known about where and
how often floods will occur, or how to protect them, can
benefit from upgrades based on what we learn today.
Similarly, houses being built today can benefit from
enhancements based on what we learn in the future. A
critical risk mitigation strategy has arisen as a result of
retrofitting:
Concrete with longitudinal and transverse reinforcement
is used to make the cladding for the columns. An
improvement in electrical conductivity is achieved through
this form of strengthening without affecting the column's
bending strength or beam-column connections. Sheathing
columns has also been proven to be ineffective at
increasing ductility. Column sheathing's key benefit is that
it improves the structure's lateral load capacity in a fairly
even and dispersed manner, which diverts attention away
from stiffness. This avoids the need for major foundational
strengthening. In addition, because this technology does
not fundamentally alter the unique geometry of the
building, the actual function of the structure can be kept.
1.1. What Is A Retrofitting?
• Existing structures, whether damaged or not, can
be seismically strengthened through a process
known as "retrofit."
• Building assessments demonstrate that a
restoration alone will not be sufficient to
withstand future shocks if the original strength of
the walls is found to be insufficient.
• Retrofitting is the process of improving an existing
structure's seismic resistance, ground movement
resistance, or ground failure resistance.
• Increases in the structure's lateral stiffness and
ductility, with greater gradation.
• Retrofitting rather than tearing down and
rebuilding a structure is a more cost-effective and
time-saving option.
Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p-ISSN: 2395-0072

2. STATE OF DEVELOPMENT
This page covers past studies on the reasons why
retrofitting is used or avoided..
Akhtar, Arif, and Set. As a result of these tests, it was
discovered that retrofitting performed admirably in nearly
every type of loading condition. Extensive research has
been done to deal with additional structural elements of
various forms and sizes subjected to extreme loading
conditions in the literature. Investigative work has
installed a fabric that can be used for a wide range of
purposes and has demonstrated its robustness as a
replacement for typical building materials.
D. G. Gaidhankaret. al 2017 Construction retrofitting
uses a wire mesh reinforcement soaked in mortar to
produce thin, high-strength parts that are also very flexible
and ductile. FEM models have recently generated
important results in order to prevent these issues and
directly evaluate the response of retrofitting in non-
conventional situations.
Dharanidharanet and colleagues (2016) older
structures should be renovated or strengthened to fulfil
the same requirements as new structures erected today
and in the future if they are to remain operational. When
ferrocement systems are improved, this will be a thing of
the past. Reinforced hydraulic cement mortar is used to
make ferrocement, a type of thin-walled reinforcing
concrete with a continuous mesh of relatively small
diameter.
Research that provides a basis for the layout equations is
done using FEM, which reduces time and costs of
expensive experimental experiments and better simulates
the load and support circumstances in a real structure.
Nassif and Najm employ FEM to study the retrofitting
process of composite beams under a two-point loading
system to get over this problem.
3. PROBLEM STATEMENT
Buildings with a 3m floor-to-floor height were examined
using the ETABS software in Zones III G+2 of the G+2
building structure in the Punavala area of Pune,
Maharashtra. Seismic forces on the building were
measured. The building site was selected because of its
hardness.
Table 1 Parameters to be consider for ETABS model
Analysis
Sr. No. Parameter Values
1. Number of storey G+2
2. Base to plinth 1.5m
3. Floor height 3 m
5. Materials Concrete M 25 and
Reinforcement Fe 500
6. Frame size -
7. Grid spacing -
8. Size of column 230 mm x 450 mm
9. Size of beam 230 mm x 450 mm
10. Depth of slab 150 mm
Fig 1 Floor Plan of Punavale Project
Fig 2 on site Column Positions and failure column

The highlighted column in the diagram above represents
the in-situ breakdown. We will use ETABS to model the
structure according to the stated column placements and
loads, and then use ANSYS to calculate the total load on
this failure column.
Fig 3Model in ETABS
Fig 4 Total Load on Failure Column
In the above figure, the failed column, which has a total
load of 452 KN, has broken. Next, we will focus on
retrofitting the column with a load of 500 KN.
4. CONCLUSION
It is possible to increase the compressive strength of a
concrete member by using lengthening procedures. The
specimen was encased in concrete to achieve concrete
encapsulation. The retention pressure exerted by the
reinforcing material improved the compressive behaviour
of the samples. Buildings with a 3m floor-to-floor height
were examined using the ETABS software in Zones III G+2
of the G+2 building structure in the Punavala area of Pune,
Maharashtra. A total of 500kN is found on this failure
column after the columns are separated on site and ETABS
is used to create the structure's model. The column will be
evaluated in ANSYS for the same or greater load utilising
various retrofitting methods.
5. REFRENCES
[1] Arif, M., Akhtar, S., Masood, A., Garg, M. And Basit’
Flexural Behaviors Of Fly Ash Mortar Retrofitting
Panels For Low Cost Housing’ Journal Of Ferro
Cement, Vol. 31, No. 2:
[2] D. G. Gaidhankar1,M. S. Kulkarni2, Abhay R.
Jaiswal ‘Ferro cement Composite Beams Under
Flexure’ 2017
[3] S. Dharanidharan ‘Flexural Behaviors Of
Retrofitting Composite Slab’ October, 2016:
[4] Hamid Eskandari , Amir hosseinmadadi
‘Investigation Of rettrofiting channels Using
Experimental And Finite Element Analysis’19 June
2015:
[5] Y. B. I. Shaheen, B. Eltaly and M. Kameel’
Experimental And Analytical Investigation Of
rettrofiting Water Pipe’11 April, 2013:
[6] Amlan K. Sengupta 1, ChemuruSrinivasuluReddy2
,Badari Narayanan V T3 And Asokan A4 ‘Seismic
Analysis And Retrofit Of Existing Multistoreyed
Buildings In India – An Overview With A Case
Study’ 2004
[7] Edoardo Cosenza1 and Iunio Iervolino2 ‘Case
Study: Seismic Retrofitting of a Medieval Bell
Tower with FRP’2007
[8] KomalBedi “Study on Various Methods and
Techniques of Retrofitting”International Journal of
Engineering Research & Technology (IJERT) IJERT
ISSN: 2278-0181 IJERTV2IS90071 www.ijert.org
Vol. 2 Issue 9, September – 2013
[9] Giuseppe Oliveto “Seismic Retrofitting Of
Reinforced Concrete Buildings Using Traditional
And Innovative Techniques”ISET Journal of
Earthquake Technology, Paper No. 454, Vol. 42,
No. 2-3, June-September 2005
[10] KeijiKitajima “Research and Development Of
Response-Control Retrofitting Techniques By
Means Of Friction Damper”
[11] AnkitDasguptaet. al. “Retrofitting of Concrete
Structure with Fiber Reinforced Polymer” IJIRST
Volume 4 | Issue 9 | February 2018
[12] Amol Suresh Satputeet. al. “Retrofitting of Beams
Using Externally Bonded Glass Fiber Reinforced

Polymer (GFRP) Wraps” IOSR Volume 14, Issue 2
2017
[13] MiladBazliet. al. “Mechanical Properties of Fibre
Reinforced Polymersunder Elevated
Temperatures: An Overview” MDPI 2020
[14] Syed Nooruddinet. al. “Strength of Nano Concrete
using Nano Silica” (IJERT) Vol. 8 Issue 05, May-
2019
[15] Dr. WijdanDeyaa Abdul Jalilet. al. “The Impact of
Nano-Concrete in Contemporary Architecture”
Wasit Journal of Engineering Science Vol. (5), No.
(2), 2017
[16] AlexandreLandesmannaet. al. “Mechanical
Properties of Glass Fiber Reinforced Polymers
Members for Structural Applications” Materials
Research 2015
[17] SayedAbdElbakyet. al. “An Overview on the
Laboratory Investigation of Using Nano-Materials
in Concrete” JOKULL Vol. 68, No. 3; Mar 2018
[18] Dipen Kumar Rajaket. al. “Fiber-Reinforced
Polymer Composites:Manufacturing, Properties,
and Applications”
[19] Manish A Kewalramaniet. al. “Application of
nanomaterials to enhance microstructure and
mechanical properties of concrete”UTHMVol. 10
No. 2 (2018)
[20] Ahmed Hassan et. al. “Use of carbon nanotubes in
the retrofitting of reinforced concrete beams with
an opening and the effect of direct fire on their
behavior” GEOMATE, April, 2018 Vol.14, Issue 44
IS CODES:
i. IS 456 : 2000 -Plain and Reinforced Concrete Code of
Practice. - BUREAU OF INDIAN STANDARDS, NEW
DELHI.
ii. IS 1893 : 2000 - Criteria For Earthquake Resistant
Design Of Structures

Analysis For Retrofitting Of An Existing Failed RC Column Using FEM Software’s

More Related Content

Similar to Analysis For Retrofitting Of An Existing Failed RC Column Using FEM Software’s (20)

More from IRJET Journal (20)

Recently uploaded (20)

Analysis For Retrofitting Of An Existing Failed RC Column Using FEM Software’s