Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams

Accurate estimation of tendon stress is crucial for calculating the flexural capacity of post-tensioned masonry members. Tendon stresses in bonded elements may be calculated based on strain-compatibility. For unbonded tendons, stresses depend on the relative displacement between the tendon's an...

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Fecha de publicación:: 2017

Institución:: Universidad de Medellín

Repositorio:: Repositorio UDEM

Idioma:: eng

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repository_id_str
dc.title.spa.fl_str_mv	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
title	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
spellingShingle	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams Beams Masonry Posttensioning Stress Unbonded tendon Finite element method Masonry materials Stresses Accurate estimation Beams Masonry Posttensioning Relative displacement Statistical evaluation Strain compatibility Unbonded tendons Tendons
title_short	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
title_full	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
title_fullStr	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
title_full_unstemmed	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
title_sort	Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams
dc.contributor.affiliation.spa.fl_str_mv	García, J.M., Civil Engineering Department, Faculty of Engineering, University of Medellin, Medellin, Colombia Bonett, R.L., Civil Engineering Department, Faculty of Engineering, University of Medellin, Medellin, Colombia Schultz, A.E., Civil, Environmental and Geo- Engineering, Twin Cities, University of Minnesota, Minneapolis, United States Ledezma, C., Structural and Geotechnical Engineering Department, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
dc.subject.keyword.eng.fl_str_mv	Beams Masonry Posttensioning Stress Unbonded tendon Finite element method Masonry materials Stresses Accurate estimation Beams Masonry Posttensioning Relative displacement Statistical evaluation Strain compatibility Unbonded tendons Tendons
topic	Beams Masonry Posttensioning Stress Unbonded tendon Finite element method Masonry materials Stresses Accurate estimation Beams Masonry Posttensioning Relative displacement Statistical evaluation Strain compatibility Unbonded tendons Tendons
description	Accurate estimation of tendon stress is crucial for calculating the flexural capacity of post-tensioned masonry members. Tendon stresses in bonded elements may be calculated based on strain-compatibility. For unbonded tendons, stresses depend on the relative displacement between the tendon's anchor points, and strain-compatibility is not totally applicable to calculate stresses. Masonry codes in some countries provide equations for unbonded, post-tensioned members that are based on modified strain-compatibility approaches for calculating stress increases in unbonded tendons at ultimate; some of these equations required calibration using statistical evaluation of experimental results and finite-element analysis. A new approach to calculate tendon stress increase, based on the theory of beam deformation, in the elastic zone, and a plastic hinge with a geometric curvature distribution in the inelastic region, is reported here for the calculation of the stress increase at ultimate. To compare the accuracy of code equations and that of the proposed methodology, a database of test results for post-tensioned, simply supported, flexure critical masonry beams has been used. This comparison shows that the proposed equation provides an accurate prediction of tendon stress at ultimate for post-tensioned masonry beams. © 2017 Elsevier Ltd
publishDate	2017
dc.date.accessioned.none.fl_str_mv	2017-12-19T19:36:48Z
dc.date.available.none.fl_str_mv	2017-12-19T19:36:48Z
dc.date.created.none.fl_str_mv	2017
dc.type.eng.fl_str_mv	Article
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dc.type.driver.none.fl_str_mv	info:eu-repo/semantics/article
dc.identifier.issn.none.fl_str_mv	1410296
dc.identifier.uri.none.fl_str_mv	http://hdl.handle.net/11407/4325
dc.identifier.doi.none.fl_str_mv	10.1016/j.engstruct.2017.01.046
dc.identifier.reponame.spa.fl_str_mv	reponame:Repositorio Institucional Universidad de Medellín
dc.identifier.instname.spa.fl_str_mv	instname:Universidad de Medellín
identifier_str_mv	1410296 10.1016/j.engstruct.2017.01.046 reponame:Repositorio Institucional Universidad de Medellín instname:Universidad de Medellín
url	http://hdl.handle.net/11407/4325
dc.language.iso.none.fl_str_mv	eng
language	eng
dc.relation.isversionof.spa.fl_str_mv	https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014881323&doi=10.1016%2fj.engstruct.2017.01.046&partnerID=40&md5=f1bd19dbdc3d468c18881b2597687377
dc.relation.ispartofes.spa.fl_str_mv	Engineering Structures
dc.relation.references.spa.fl_str_mv	Ozkul, O., Nassif, H., Tanchan, P., Harajli, M., Rational approach for predicting stress in beams with unbonded tendons (2008) ACI Struct J, 105 (3), pp. 338-347 BS 5628-2, Code of practice for the use of masonry Part 2: structural use of reinforced and prestressed masonry (2005), British Standards Institution London (United Kingdom)AS 3700, Masonry structures (2011), Standards Australia International Sydney (NSW, Australia)Masonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2013), ACI 530-13/ASCE 5-13/TMS 402-13 American Concrete Institute Farmington Hills, MichNZS 4320, Design of reinforced concrete masonry structures (2004), Standards New Zealand Wellington (New Zealand)Design of masonry structures (2014), Canadian Standards Association Mississauga (Ontario, Canada)He, Z., Liu, Z., Stresses in external and internal unbonded tendons: unified methodology and design equations (2010) J Struct Eng, 136 (9), pp. 1055-1065 Harajli, M.H., On the stress in unbonded tendons at ultimate: critical assessment and proposed changes (2006) ACI Struct J, 103 (6), pp. 803-812 Guiglia, M., Taliano, M., Debernardi, P.G., Calculation of the ultimate stress of unbonded tendons in prestressed concrete members considering the rotation capacity (2012) Mag Concr Res, 65 (1), pp. 14-26 Baker, A.L., Plastic theory of design for ordinary reinforced and prestressed concrete including moment redistribution in continuous members (1949) Mag Concr Res, 1 (2), pp. 57-66 Naaman, A.E., Alkhairi, F.M., Stress at ultimate in unbonded post-tensioning tendons: Part 2—Proposed methodology (1991) ACI Struct J, 88 (6), pp. 683-692 Wight, G.D., Ingham, J.M., Kowalsky, M.J., Shaketable testing of rectangular post-tensioned concrete masonry walls (2006) ACI Struct J, 103 (4), pp. 587-595 Schultz, A.E., Scolforo, M., An overview of prestressed masonry (1991) TMS J, 10 (1), pp. 6-21. , The Masonry Society Bean, J.R., Experimental verification of the resistance of masonry walls under transverse loads (2003), p. 140. , M.S. Thesis University of Minnesota Minneapolis, MNBean, J.R., Schultz, A.E., Design provisions for post tensioned masonry walls loaded out-of-plane (2010) TMS J, 28 (2), pp. 9-26 Bean, J.R., Schultz, A.E., Flexural capacity of posttensioned masonry walls: code review and recommended procedure (2003) Post-Tensioning Inst J, 1 (1), pp. 28-44 Masonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2002), ACI 530-02/ASCE 5-02/TMS 402-02 American Concrete Institute Farmington Hills, MichMasonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2005), ACI 530-05/ASCE 5-05/TMS 402-05 American Concrete Institute Farmington Hills, MichHarajli, M.H., Mabsout, M.E., Al-Hajj, J.A., Response of externally post-tensioned continuous members (2002) ACI Struct J, 99 (5), pp. 671-680 Au, F.T.K., Du, J.S., Prediction of ultimate stress in unbonded prestressed tendons (2004) Mag Concrete Res, 56 (1), pp. 1-11 Nazir, N.A., Hart, G.C., Analytical stress strain curves for confined and reinforced concrete masonry (2001) TMS J, 19 (1), pp. 9-20 Soto, I.I., Ramalho, M.A., Izquierdo, O.S., Post-cracking behavior of blocks, prisms, and small concrete walls reinforced with plant fiber (2013) IBRACON Struct Mater J, 6 (4), pp. 598-612. , Brazilian Concrete Institute Kaushik, H.B., Rai, D.C., Jain, S.K., Stress-strain characteristics of clay brick masonry under uniaxial compression (2007) J Struct Eng, ASCE, 19 (9), pp. 728-739 Mohamad, G., Lourenco, P.B., Roman, H.R., Mechanics of hollow concrete block masonry prisms under compression: review and prospects (2007) Cement Concr Compos, 29, pp. 181-192 Baqi, A., Bhandari, N.M., Trikha, D.N., Experimental study of prestressed masonry flexural elements (1999) J Struct Eng, 125 (3), pp. 245-254 García, J.M., Ledezma, C., Bonett, R., Modelo analítico del comportamiento a compresión de bloques huecos de concreto [Analytical Model for Compression Behavior of Hollow Concrete Blocks] (2013) Revista de la Construcción, 12 (3), pp. 76-82 García, J.M., Flexural behavior of ungrouted post-tensioned concrete masonry (2016), PhD thesis Universidad de Medellin Colombia AASTM C1314, Standard test method for compressive strength of masonry prisms (2014), ASTM International West Conshohocken (PA)Wight, G.D., Ingham, J.M., Tendon stress in unbonded posttensioned masonry walls at nominal in-plane strength (2008) J Struct Eng, 134 (6), pp. 938-946
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dc.publisher.spa.fl_str_mv	Elsevier Ltd
dc.publisher.faculty.spa.fl_str_mv	Facultad de Ingenierías
dc.source.spa.fl_str_mv	Scopus
institution	Universidad de Medellín
repository.name.fl_str_mv	Repositorio Institucional Universidad de Medellin
repository.mail.fl_str_mv	repositorio@udem.edu.co
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spelling	2017-12-19T19:36:48Z2017-12-19T19:36:48Z20171410296http://hdl.handle.net/11407/432510.1016/j.engstruct.2017.01.046reponame:Repositorio Institucional Universidad de Medellíninstname:Universidad de MedellínAccurate estimation of tendon stress is crucial for calculating the flexural capacity of post-tensioned masonry members. Tendon stresses in bonded elements may be calculated based on strain-compatibility. For unbonded tendons, stresses depend on the relative displacement between the tendon's anchor points, and strain-compatibility is not totally applicable to calculate stresses. Masonry codes in some countries provide equations for unbonded, post-tensioned members that are based on modified strain-compatibility approaches for calculating stress increases in unbonded tendons at ultimate; some of these equations required calibration using statistical evaluation of experimental results and finite-element analysis. A new approach to calculate tendon stress increase, based on the theory of beam deformation, in the elastic zone, and a plastic hinge with a geometric curvature distribution in the inelastic region, is reported here for the calculation of the stress increase at ultimate. To compare the accuracy of code equations and that of the proposed methodology, a database of test results for post-tensioned, simply supported, flexure critical masonry beams has been used. This comparison shows that the proposed equation provides an accurate prediction of tendon stress at ultimate for post-tensioned masonry beams. © 2017 Elsevier LtdengElsevier LtdFacultad de Ingenieríashttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85014881323&doi=10.1016%2fj.engstruct.2017.01.046&partnerID=40&md5=f1bd19dbdc3d468c18881b2597687377Engineering StructuresOzkul, O., Nassif, H., Tanchan, P., Harajli, M., Rational approach for predicting stress in beams with unbonded tendons (2008) ACI Struct J, 105 (3), pp. 338-347BS 5628-2, Code of practice for the use of masonry Part 2: structural use of reinforced and prestressed masonry (2005), British Standards Institution London (United Kingdom)AS 3700, Masonry structures (2011), Standards Australia International Sydney (NSW, Australia)Masonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2013), ACI 530-13/ASCE 5-13/TMS 402-13 American Concrete Institute Farmington Hills, MichNZS 4320, Design of reinforced concrete masonry structures (2004), Standards New Zealand Wellington (New Zealand)Design of masonry structures (2014), Canadian Standards Association Mississauga (Ontario, Canada)He, Z., Liu, Z., Stresses in external and internal unbonded tendons: unified methodology and design equations (2010) J Struct Eng, 136 (9), pp. 1055-1065Harajli, M.H., On the stress in unbonded tendons at ultimate: critical assessment and proposed changes (2006) ACI Struct J, 103 (6), pp. 803-812Guiglia, M., Taliano, M., Debernardi, P.G., Calculation of the ultimate stress of unbonded tendons in prestressed concrete members considering the rotation capacity (2012) Mag Concr Res, 65 (1), pp. 14-26Baker, A.L., Plastic theory of design for ordinary reinforced and prestressed concrete including moment redistribution in continuous members (1949) Mag Concr Res, 1 (2), pp. 57-66Naaman, A.E., Alkhairi, F.M., Stress at ultimate in unbonded post-tensioning tendons: Part 2—Proposed methodology (1991) ACI Struct J, 88 (6), pp. 683-692Wight, G.D., Ingham, J.M., Kowalsky, M.J., Shaketable testing of rectangular post-tensioned concrete masonry walls (2006) ACI Struct J, 103 (4), pp. 587-595Schultz, A.E., Scolforo, M., An overview of prestressed masonry (1991) TMS J, 10 (1), pp. 6-21. , The Masonry SocietyBean, J.R., Experimental verification of the resistance of masonry walls under transverse loads (2003), p. 140. , M.S. Thesis University of Minnesota Minneapolis, MNBean, J.R., Schultz, A.E., Design provisions for post tensioned masonry walls loaded out-of-plane (2010) TMS J, 28 (2), pp. 9-26Bean, J.R., Schultz, A.E., Flexural capacity of posttensioned masonry walls: code review and recommended procedure (2003) Post-Tensioning Inst J, 1 (1), pp. 28-44Masonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2002), ACI 530-02/ASCE 5-02/TMS 402-02 American Concrete Institute Farmington Hills, MichMasonry Standards Joint Committee (MSJC), Building code requirements for masonry structures (2005), ACI 530-05/ASCE 5-05/TMS 402-05 American Concrete Institute Farmington Hills, MichHarajli, M.H., Mabsout, M.E., Al-Hajj, J.A., Response of externally post-tensioned continuous members (2002) ACI Struct J, 99 (5), pp. 671-680Au, F.T.K., Du, J.S., Prediction of ultimate stress in unbonded prestressed tendons (2004) Mag Concrete Res, 56 (1), pp. 1-11Nazir, N.A., Hart, G.C., Analytical stress strain curves for confined and reinforced concrete masonry (2001) TMS J, 19 (1), pp. 9-20Soto, I.I., Ramalho, M.A., Izquierdo, O.S., Post-cracking behavior of blocks, prisms, and small concrete walls reinforced with plant fiber (2013) IBRACON Struct Mater J, 6 (4), pp. 598-612. , Brazilian Concrete InstituteKaushik, H.B., Rai, D.C., Jain, S.K., Stress-strain characteristics of clay brick masonry under uniaxial compression (2007) J Struct Eng, ASCE, 19 (9), pp. 728-739Mohamad, G., Lourenco, P.B., Roman, H.R., Mechanics of hollow concrete block masonry prisms under compression: review and prospects (2007) Cement Concr Compos, 29, pp. 181-192Baqi, A., Bhandari, N.M., Trikha, D.N., Experimental study of prestressed masonry flexural elements (1999) J Struct Eng, 125 (3), pp. 245-254García, J.M., Ledezma, C., Bonett, R., Modelo analítico del comportamiento a compresión de bloques huecos de concreto [Analytical Model for Compression Behavior of Hollow Concrete Blocks] (2013) Revista de la Construcción, 12 (3), pp. 76-82García, J.M., Flexural behavior of ungrouted post-tensioned concrete masonry (2016), PhD thesis Universidad de Medellin Colombia AASTM C1314, Standard test method for compressive strength of masonry prisms (2014), ASTM International West Conshohocken (PA)Wight, G.D., Ingham, J.M., Tendon stress in unbonded posttensioned masonry walls at nominal in-plane strength (2008) J Struct Eng, 134 (6), pp. 938-946ScopusStress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beamsArticleinfo:eu-repo/semantics/articlehttp://purl.org/coar/version/c_970fb48d4fbd8a85http://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1García, J.M., Civil Engineering Department, Faculty of Engineering, University of Medellin, Medellin, ColombiaBonett, R.L., Civil Engineering Department, Faculty of Engineering, University of Medellin, Medellin, ColombiaSchultz, A.E., Civil, Environmental and Geo- Engineering, Twin Cities, University of Minnesota, Minneapolis, United StatesLedezma, C., Structural and Geotechnical Engineering Department, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, ChileGarcía J.M.Bonett R.L.Schultz A.E.Ledezma C.Civil Engineering Department, Faculty of Engineering, University of Medellin, Medellin, ColombiaCivil, Environmental and Geo- Engineering, Twin Cities, University of Minnesota, Minneapolis, United StatesStructural and Geotechnical Engineering Department, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, ChileBeamsMasonryPosttensioningStressUnbonded tendonFinite element methodMasonry materialsStressesAccurate estimationBeamsMasonryPosttensioningRelative displacementStatistical evaluationStrain compatibilityUnbonded tendonsTendonsAccurate estimation of tendon stress is crucial for calculating the flexural capacity of post-tensioned masonry members. Tendon stresses in bonded elements may be calculated based on strain-compatibility. For unbonded tendons, stresses depend on the relative displacement between the tendon's anchor points, and strain-compatibility is not totally applicable to calculate stresses. Masonry codes in some countries provide equations for unbonded, post-tensioned members that are based on modified strain-compatibility approaches for calculating stress increases in unbonded tendons at ultimate; some of these equations required calibration using statistical evaluation of experimental results and finite-element analysis. A new approach to calculate tendon stress increase, based on the theory of beam deformation, in the elastic zone, and a plastic hinge with a geometric curvature distribution in the inelastic region, is reported here for the calculation of the stress increase at ultimate. To compare the accuracy of code equations and that of the proposed methodology, a database of test results for post-tensioned, simply supported, flexure critical masonry beams has been used. This comparison shows that the proposed equation provides an accurate prediction of tendon stress at ultimate for post-tensioned masonry beams. © 2017 Elsevier Ltdhttp://purl.org/coar/access_right/c_16ec11407/4325oai:repository.udem.edu.co:11407/43252020-05-27 15:39:55.022Repositorio Institucional Universidad de Medellinrepositorio@udem.edu.co

Stress at ultimate in unbonded tendons for ungrouted post-tensioned masonry beams

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