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Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings

This study presents a finite element analysis to investigate the behaviour of reinforced concrete deep beams with square and circular openings. Deep beams are always constructed at the lower floors as transfer beams to transfer the loads from the entire building to the foundations. Reinforced concre...

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Main Author: Shim , Chee Wei
Format: Undergraduates Project Papers
Language:English
Published: 2015
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/11947/1/FKKSA-%20SHIM%20CHEE%20WEI%20%289303%29.pdf
http://umpir.ump.edu.my/id/eprint/11947/
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spelling my.ump.umpir.119472022-01-18T04:06:21Z http://umpir.ump.edu.my/id/eprint/11947/ Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings Shim , Chee Wei TA Engineering (General). Civil engineering (General) This study presents a finite element analysis to investigate the behaviour of reinforced concrete deep beams with square and circular openings. Deep beams are always constructed at the lower floors as transfer beams to transfer the loads from the entire building to the foundations. Reinforced concrete (RC) acts as one of the most essential building materials and it is widely used in the construction due to its low pricing, efficiency and strength of the reinforced concretes as well as its stiffness. Openings are inevitable for the architectural and mechanical purpose to accommodate the conduits. However, presence of openings in the deep beams will significantly reduce the load capacity of the deep beams, as well as excessive cracking and deflection. Strengthening by Carbon Fibre Reinforced Polymer helps in regain the load bearing capacity of the deep beams. Researches were focus on the experimental work and hence this study conducted in terms of the numerical aspects and finite element analysis. ANSYS CivilFEM 12.0, a finite element modelling and analysis software, was used to analysis the deep beams. Three – dimensional modelling of RC deep beams was adopted in this study. A total of 14 beams including one control beam were modelled as simply supported beam with openings where the locations of the openings were at the support which was 300 mm from the edge of the beams. Two incremental loads were applied at the 800 mm from the edge of the beams. The beams was symmetrical in shape. The beams had the cross sections of 120 mm x 600 mm and 2400 mm in length with square and circular openings. The objectives of this study were to determine the most effective strengthening method by using CFRP in terms of load-deflection behaviours, crack patterns, stress and strain contours. This study was validated by experimental results. Various strengthening methods were used to identify the most effective method of strengthening which included orientation of CFRP in vertical alignment (90º), horizontal alignment (0º), whole piece, cut strips, surface strengthening and U-wrap strengthening. Deep beams with openings failed due to shear cracks because of the sharp edges of the openings. From the finding, the square opening and circular opening experienced a reduction of 62.0% and 51.3% in beam capacity, respectively. From the various strengthening configurations of CFRP, configuration with vertical alignment, whole piece and U-wrap strengthening method was the most effective method. CFRP restored the load bearing capacity with most effective method by 63.0% and 85.0% for deep beams with square and circular openings respectively. A comparison between the numerical and experiments results showed that a comparable agreement on the load deflection behaviours and strong agreement on the crack patterns. 2015-06 Undergraduates Project Papers NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/11947/1/FKKSA-%20SHIM%20CHEE%20WEI%20%289303%29.pdf Shim , Chee Wei (2015) Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings. Faculty of Civil Engineering & Earth Resources, Universiti Malaysia Pahang.
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Shim , Chee Wei
Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
description This study presents a finite element analysis to investigate the behaviour of reinforced concrete deep beams with square and circular openings. Deep beams are always constructed at the lower floors as transfer beams to transfer the loads from the entire building to the foundations. Reinforced concrete (RC) acts as one of the most essential building materials and it is widely used in the construction due to its low pricing, efficiency and strength of the reinforced concretes as well as its stiffness. Openings are inevitable for the architectural and mechanical purpose to accommodate the conduits. However, presence of openings in the deep beams will significantly reduce the load capacity of the deep beams, as well as excessive cracking and deflection. Strengthening by Carbon Fibre Reinforced Polymer helps in regain the load bearing capacity of the deep beams. Researches were focus on the experimental work and hence this study conducted in terms of the numerical aspects and finite element analysis. ANSYS CivilFEM 12.0, a finite element modelling and analysis software, was used to analysis the deep beams. Three – dimensional modelling of RC deep beams was adopted in this study. A total of 14 beams including one control beam were modelled as simply supported beam with openings where the locations of the openings were at the support which was 300 mm from the edge of the beams. Two incremental loads were applied at the 800 mm from the edge of the beams. The beams was symmetrical in shape. The beams had the cross sections of 120 mm x 600 mm and 2400 mm in length with square and circular openings. The objectives of this study were to determine the most effective strengthening method by using CFRP in terms of load-deflection behaviours, crack patterns, stress and strain contours. This study was validated by experimental results. Various strengthening methods were used to identify the most effective method of strengthening which included orientation of CFRP in vertical alignment (90º), horizontal alignment (0º), whole piece, cut strips, surface strengthening and U-wrap strengthening. Deep beams with openings failed due to shear cracks because of the sharp edges of the openings. From the finding, the square opening and circular opening experienced a reduction of 62.0% and 51.3% in beam capacity, respectively. From the various strengthening configurations of CFRP, configuration with vertical alignment, whole piece and U-wrap strengthening method was the most effective method. CFRP restored the load bearing capacity with most effective method by 63.0% and 85.0% for deep beams with square and circular openings respectively. A comparison between the numerical and experiments results showed that a comparable agreement on the load deflection behaviours and strong agreement on the crack patterns.
format Undergraduates Project Papers
author Shim , Chee Wei
author_facet Shim , Chee Wei
author_sort Shim , Chee Wei
title Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
title_short Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
title_full Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
title_fullStr Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
title_full_unstemmed Numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
title_sort numerical analysis on the behaviour of cfrp shear- strengthened rc deep beams with large square and circular openings
publishDate 2015
url http://umpir.ump.edu.my/id/eprint/11947/1/FKKSA-%20SHIM%20CHEE%20WEI%20%289303%29.pdf
http://umpir.ump.edu.my/id/eprint/11947/
_version_ 1724073451975606272
score 13.211869

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