subject:(CFRP sheets)

Kansas State University

1. Zaki, Mohammed Ameen. Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices.

Degree: PhD, Department of Civil Engineering, 2018, Kansas State University

URL: http://hdl.handle.net/2097/39244

► The use of carbon fiber reinforced polymer (CFRP) anchors can improve the performance of reinforced concrete (RC) beams strengthened in flexure with CFRP sheets. This… (more)

▼ The use of carbon fiber reinforced polymer (CFRP) anchors can improve the performance of reinforced concrete (RC) beams strengthened in flexure with CFRP sheets. This improvement results from delaying or controlling the debonding of FRP sheets at failure. In this research, six full-scale T beams and six full-scale rectangular beams are prepared and tested as two separate series. All the specimens are strengthened identically using three layers of unidirectional CFRP sheets and one layer of bidirectional CFRP sheet. The first strengthened beam in each series is anchored with side GFRP bars inserted longitudinally to both sides of the beam. The second strengthened beam in each series is anchored with GFRP patches applied to both sides of the beam. CFRP spike anchors are utilized for the other beams in the two series. The third beam in each series is secured with CFRP spike anchors of 16 mm diameter at 140 mm spacing along the shear span. The fourth strengthened beam in each series is anchored with CFRP spike anchors of 19 mm diameter at 203 mm spacing along the shear span. Four CFRP anchors are applied to each shear span of the fifth beam in each series with 16 mm- diameter (spaced at 406 mm) to secure the flexural CFRP sheets. An end CFRP anchorage technique is considered for the last beam in each series, which includes installing one CFRP spike anchor placed at 76 mm from the free edge of CFRP sheets. The beams were tested under four-point bending until failure and the results for each series are evaluated. In addition, the outcome is compared with other anchorage techniques that have been examined by some researchers utilizing the same beam geometry and properties. The experimental testing and nonlinear analysis showed improvement in the flexural performance of anchored beams compared with those strengthened beams without anchorage. By attaining debonding or rupture failure modes for the T beams and concrete crushing failure mode for the rectangular specimens, the ultimate sectional force capacity is achieved. Accordingly, the results prove that the anchors offer an effective solution against premature debonding failure. Advisors/Committee Members: Hayder A. Rasheed.

Subjects/Keywords: CFRP sheets; anchorage devices; flexural strengthening; CFRP spike anchors

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APA (6^th Edition):

Zaki, M. A. (2018). Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/39244

Chicago Manual of Style (16^th Edition):

Zaki, Mohammed Ameen. “Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices.” 2018. Doctoral Dissertation, Kansas State University. Accessed February 25, 2021. http://hdl.handle.net/2097/39244.

MLA Handbook (7^th Edition):

Zaki, Mohammed Ameen. “Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices.” 2018. Web. 25 Feb 2021.

Vancouver:

Zaki MA. Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices. [Internet] [Doctoral dissertation]. Kansas State University; 2018. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/2097/39244.

Council of Science Editors:

Zaki MA. Behavior of reinforced concrete beams strengthened using CFRP sheets with superior anchorage devices. [Doctoral Dissertation]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39244

Universidade do Minho

2. Silva, Joaquim Rodrigues Monteiro da. Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP.

Degree: 2017, Universidade do Minho

URL: http://hdl.handle.net/1822/64774

► This dissertation is the result of a research carried out on the simultaneous flexural and shear strengthening of reinforced concrete (RC) beams using a hybrid… (more)

Subjects/Keywords: Vigas de betão armado; Reforço simultâneo à flexão e ao corte; Laminados de CFRP inseridos; Mantas de CFRP coladas externamente; Comportamento experimental; Reinforced concrete beams; Simultaneous flexural and shear strengthening; NSM CFRP laminates; EBR CFRP wet lay-up sheets; Experimental behavior; Engenharia e Tecnologia::Engenharia Civil

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silva, J. R. M. d. (2017). Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP. (Masters Thesis). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/64774

Chicago Manual of Style (16^th Edition):

Silva, Joaquim Rodrigues Monteiro da. “Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP.” 2017. Masters Thesis, Universidade do Minho. Accessed February 25, 2021. http://hdl.handle.net/1822/64774.

MLA Handbook (7^th Edition):

Silva, Joaquim Rodrigues Monteiro da. “Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP.” 2017. Web. 25 Feb 2021.

Vancouver:

Silva JRMd. Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP. [Internet] [Masters thesis]. Universidade do Minho; 2017. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1822/64774.

Council of Science Editors:

Silva JRMd. Reforço à flexão e ao corte de vigas de betão armado com uma solução híbrida de CFRP. [Masters Thesis]. Universidade do Minho; 2017. Available from: http://hdl.handle.net/1822/64774

Tokyo Institute of Technology / 東京工業大学

3. NGUYEN, THI THU DUNG. Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets.

Degree: 博士（工学）, 2015, Tokyo Institute of Technology / 東京工業大学

URL: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100695237

Subjects/Keywords: Prestress concrete; Flexure; Shear; Strengthening; CFRP sheets

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APA (6^th Edition):

NGUYEN, T. T. D. (2015). Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets. (Thesis). Tokyo Institute of Technology / 東京工業大学. Retrieved from http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100695237

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

NGUYEN, THI THU DUNG. “Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets.” 2015. Thesis, Tokyo Institute of Technology / 東京工業大学. Accessed February 25, 2021. http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100695237.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

NGUYEN, THI THU DUNG. “Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets.” 2015. Web. 25 Feb 2021.

Vancouver:

NGUYEN TTD. Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets. [Internet] [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2015. [cited 2021 Feb 25]. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100695237.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

NGUYEN TTD. Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets : Behavior of Pretensioned PC Beams Strengthened in Flexure and Shear using Externally Bonded CFRP Sheets. [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2015. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100695237

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Windsor

4. Polies, Wafa. Rehabilitation of reinforced concrete slab-column system using CFRP sheets.

Degree: MA, Civil and Environmental Engineering, 2007, University of Windsor

URL: https://scholar.uwindsor.ca/etd/6975

Subjects/Keywords: CFRP; COLUMN; CONCRETE; REHABILITATION; REINFORCED; SHEETS; SLAB; SYSTEM; USING

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Polies, W. (2007). Rehabilitation of reinforced concrete slab-column system using CFRP sheets. (Masters Thesis). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/6975

Chicago Manual of Style (16^th Edition):

Polies, Wafa. “Rehabilitation of reinforced concrete slab-column system using CFRP sheets.” 2007. Masters Thesis, University of Windsor. Accessed February 25, 2021. https://scholar.uwindsor.ca/etd/6975.

MLA Handbook (7^th Edition):

Polies, Wafa. “Rehabilitation of reinforced concrete slab-column system using CFRP sheets.” 2007. Web. 25 Feb 2021.

Vancouver:

Polies W. Rehabilitation of reinforced concrete slab-column system using CFRP sheets. [Internet] [Masters thesis]. University of Windsor; 2007. [cited 2021 Feb 25]. Available from: https://scholar.uwindsor.ca/etd/6975.

Council of Science Editors:

Polies W. Rehabilitation of reinforced concrete slab-column system using CFRP sheets. [Masters Thesis]. University of Windsor; 2007. Available from: https://scholar.uwindsor.ca/etd/6975

University of Bath

5. Brindley, Monika. Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets.

Degree: PhD, 2018, University of Bath

URL: https://researchportal.bath.ac.uk/en/studentthesis/shear-assessment-and-strengthening-of-reinforced-concrete-tbeams-with-externally-bonded-cfrp-sheets(5467c456-6b66-4e60-911d-0007887ce790).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761006

► Existing reinforced concrete bridges may be deemed inadequate to carry the ever-increasing traffic loads according to the current codes and standards before they reach the… (more)

▼ Existing reinforced concrete bridges may be deemed inadequate to carry the ever-increasing traffic loads according to the current codes and standards before they reach the end of their design life. It may therefore be required to either strengthen or replace these structures, which can be costly and causes disruptions to the infrastructure. This work investigates experimentally the possibilities to extend the useful life of existing reinforced concrete slab-on-beam structures deficient in shear by means of structural strengthening with fibre-reinforced polymers (FRP). The experimental campaign involved mechanical testing of ten full-scale T-beam specimens, representative of typical existing slab-on-beam bridges. Two sizes of test specimen were used to investigate the effect of size on the ultimate shear capacity of the beams. The investigated shear-strengthening configurations included externally bonded carbon fibre reinforced polymer (CFRP) sheets in a U-wrap configuration with and without end-anchorage and deep embedded CFRP bars. Unstrengthened control specimens were also tested to provide baseline for comparison. The results from the experimental programme revealed that while the deep embedment strengthening solution provides an increase in shear capacity of up to 50%, the strengthening with CFRP U-wraps results in reduced capacity compared with the underlying control beam. This presents a major implication in terms of safe design predictions of shear capacity of reinforced concrete T-beams strengthened with CFRP sheets as this is the most commonly used shear-strengthening scheme in practice. The study also demonstrated that greater contribution from the externally bonded CFRP U-wraps can be achieved using end-anchorage systems, which delay the debonding of the CFRP. The applicability of current codes of standards and guidelines was studied as well as appropriateness of using advanced numerical methods for assessment of existing reinforced concrete structures. It was found that while the standards used for assessment greatly under-predict the shear capacity, the guidelines for FRP-strengthened beams either under- or over-predict the shear capacity of the tested beams. More accurate predictions are possible using advanced fracture mechanics-based methods for both the unstrengthened as well as the strengthened beams.

Subjects/Keywords: 624.1; Reinforced Concrete T-beams; Shear; FRP Strengthening; Assessment; CFRP sheets; Deep Embedment; Experimental Testing; Numerical Analysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brindley, M. (2018). Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets. (Doctoral Dissertation). University of Bath. Retrieved from https://researchportal.bath.ac.uk/en/studentthesis/shear-assessment-and-strengthening-of-reinforced-concrete-tbeams-with-externally-bonded-cfrp-sheets(5467c456-6b66-4e60-911d-0007887ce790).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761006

Chicago Manual of Style (16^th Edition):

Brindley, Monika. “Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets.” 2018. Doctoral Dissertation, University of Bath. Accessed February 25, 2021. https://researchportal.bath.ac.uk/en/studentthesis/shear-assessment-and-strengthening-of-reinforced-concrete-tbeams-with-externally-bonded-cfrp-sheets(5467c456-6b66-4e60-911d-0007887ce790).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761006.

MLA Handbook (7^th Edition):

Brindley, Monika. “Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets.” 2018. Web. 25 Feb 2021.

Vancouver:

Brindley M. Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets. [Internet] [Doctoral dissertation]. University of Bath; 2018. [cited 2021 Feb 25]. Available from: https://researchportal.bath.ac.uk/en/studentthesis/shear-assessment-and-strengthening-of-reinforced-concrete-tbeams-with-externally-bonded-cfrp-sheets(5467c456-6b66-4e60-911d-0007887ce790).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761006.

Council of Science Editors:

Brindley M. Shear assessment and strengthening of reinforced concrete T-beams with externally bonded CFRP sheets. [Doctoral Dissertation]. University of Bath; 2018. Available from: https://researchportal.bath.ac.uk/en/studentthesis/shear-assessment-and-strengthening-of-reinforced-concrete-tbeams-with-externally-bonded-cfrp-sheets(5467c456-6b66-4e60-911d-0007887ce790).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761006

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