Computational Technology Resources - CCP

Keywords: steel-reinforced polymer, fiber-reinforced polymer, reinforced concrete, near-field earthquake, finite element method, ductility.

Summary

Over the years, engineers have used different methods and techniques to retrofit existing structures by providing external confining stresses. For the past few years, the concept of jacketing has been investigated to provide such forces. Interest in the use of flexible fiber reinforced polymer (FRP) sheets for the external wrapping of concrete compressed members is today a very popular theme, especially with regard to estimating the effectiveness of this reinforcing technique in increasing the strength and ductility of members in seismic areas. Although FRP provides a very effective strengthening method, it has some drawbacks, such as high cost and brittleness. Steel reinforced polymers (SRP) were developed to solve these problems [1]. In the current research the seismic performance of columns retrofitted with an SRP jacket and an FRP jacket is investigated through analytical analysis. A reinforced concrete column is developed with the ABAQUS finite element software. A plastic damage model was used in order to model the concrete's behavior. A fracture energy based constitutive model is used to simulate the reinforced concrete column's behavior under cyclic loading [2]. After model verification with an experimental study [3], the column is retrofitted with an SRP jacket and an FRP jacket. Both FRP and SRP jackets were modeled as orthotropic materials [4]. The model is subjected to near-field earthquake records. Three records were used in this study. The models were retrofitted with one, two and three layers of SRP and FRP separately. The effect of increasing the number of retrofitting layers on column's seismic behavior is investigated. Results indicate that increasing the number of retrofitting layers with both FRP and SRP jackets, leads to a higher ductility. Applying both an FRP jacket and an SRP jacket in near-field earthquakes causes an increase in the maximum base shear and an increase in the column displacement. Increasing the number of layers causes a considerable increase in the maximum base shear and a considerable increase in the column displacement.

References

1: X. Huang, V. Birman, A. Nanni, G. Tunis, "Properties and potential for application of steel reinforced polymer (SRP) and steel reinforced grout (SRG) composites", Composites, Part B, 36(1), 73-82, 2005.
2: W. He, Y.-F. Wu, K.M. Liew, "A fracture energy based constitutive model for the analysis of reinforced concrete structures under cyclic loading", Comput. Methods Appl. Mech. Engrg., 197, 4745-4762, 2008. doi:10.1016/j.cma.2008.06.017
3: D. Bournas, P. Lontou, C. Papanicolaou, C. Triantafillou, "Textile-Reinforced Mortar versus Fiber-Reinforced Polymer Confinement in Reinforced Concrete Columns", ACI Structural Journal, 104, 740-748, 2007.
4: B. Barton, E. Wobbe, L.R. Dharani, P. Silva, V. Birman, A. Nanni, et al., "Characterization of reinforced concrete beams strengthened by steel reinforced polymer and grout (SRP or SRG) composites", Mater Sci Eng A, 412(1-2), 129-136, 2005. doi:10.1016/j.msea.2005.08.151

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £130 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 96 PROCEEDINGS OF THE THIRTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping and Y. Tsompanakis Paper 174 Seismic Assessment of Column Retrofitted with Steel Reinforced Polymers in Near Fault Earthquakes Y. Yasrebi Nia¹, M. Poorsharifi² and Z. Poorsharifi² ¹Civil Engineering Faculty, Islamic Azad University, Shabestar Branch, Iran ²Civil Engineering Faculty, Tabriz State University, Iran doi:10.4203/ccp.96.174 purchase the full-text of this paper Full Bibliographic Reference for this paper Y. Yasrebi Nia, M. Poorsharifi, Z. Poorsharifi, "Seismic Assessment of Column Retrofitted with Steel Reinforced Polymers in Near Fault Earthquakes", in B.H.V. Topping, Y. Tsompanakis, (Editors), "Proceedings of the Thirteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 174, 2011. doi:10.4203/ccp.96.174 Keywords: steel-reinforced polymer, fiber-reinforced polymer, reinforced concrete, near-field earthquake, finite element method, ductility. Summary Over the years, engineers have used different methods and techniques to retrofit existing structures by providing external confining stresses. For the past few years, the concept of jacketing has been investigated to provide such forces. Interest in the use of flexible fiber reinforced polymer (FRP) sheets for the external wrapping of concrete compressed members is today a very popular theme, especially with regard to estimating the effectiveness of this reinforcing technique in increasing the strength and ductility of members in seismic areas. Although FRP provides a very effective strengthening method, it has some drawbacks, such as high cost and brittleness. Steel reinforced polymers (SRP) were developed to solve these problems [1]. In the current research the seismic performance of columns retrofitted with an SRP jacket and an FRP jacket is investigated through analytical analysis. A reinforced concrete column is developed with the ABAQUS finite element software. A plastic damage model was used in order to model the concrete's behavior. A fracture energy based constitutive model is used to simulate the reinforced concrete column's behavior under cyclic loading [2]. After model verification with an experimental study [3], the column is retrofitted with an SRP jacket and an FRP jacket. Both FRP and SRP jackets were modeled as orthotropic materials [4]. The model is subjected to near-field earthquake records. Three records were used in this study. The models were retrofitted with one, two and three layers of SRP and FRP separately. The effect of increasing the number of retrofitting layers on column's seismic behavior is investigated. Results indicate that increasing the number of retrofitting layers with both FRP and SRP jackets, leads to a higher ductility. Applying both an FRP jacket and an SRP jacket in near-field earthquakes causes an increase in the maximum base shear and an increase in the column displacement. Increasing the number of layers causes a considerable increase in the maximum base shear and a considerable increase in the column displacement. References 1 X. Huang, V. Birman, A. Nanni, G. Tunis, "Properties and potential for application of steel reinforced polymer (SRP) and steel reinforced grout (SRG) composites", Composites, Part B, 36(1), 73-82, 2005. 2 W. He, Y.-F. Wu, K.M. Liew, "A fracture energy based constitutive model for the analysis of reinforced concrete structures under cyclic loading", Comput. Methods Appl. Mech. Engrg., 197, 4745-4762, 2008. doi:10.1016/j.cma.2008.06.017 3 D. Bournas, P. Lontou, C. Papanicolaou, C. Triantafillou, "Textile-Reinforced Mortar versus Fiber-Reinforced Polymer Confinement in Reinforced Concrete Columns", ACI Structural Journal, 104, 740-748, 2007. 4 B. Barton, E. Wobbe, L.R. Dharani, P. Silva, V. Birman, A. Nanni, et al., "Characterization of reinforced concrete beams strengthened by steel reinforced polymer and grout (SRP or SRG) composites", Mater Sci Eng A, 412(1-2), 129-136, 2005. doi:10.1016/j.msea.2005.08.151 purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £130 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions