{"title":"Behavior of FRP Strengthened Large-Scale Masonry Walls","authors":"A. Sayari, T. Donchev, M. Limbachiya","doi":"10.14359/51682453","DOIUrl":"https://doi.org/10.14359/51682453","url":null,"abstract":"","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation of Empirical Fatigue Prediction Models for FRP-Strengthened RC Beams","authors":"K. Gordon, L. Cheng","doi":"10.14359/51682447","DOIUrl":"https://doi.org/10.14359/51682447","url":null,"abstract":"","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Synopsis: This paper presents an evaluation of the use of a new innovative cementitious material, commercially known as Grancrete PCW, as an alternative to epoxy for FRP strengthening systems used for reinforced concrete (RC) structures. Grancrete is an environmentally friendly material that develops high early bond strength and possesses an excellent resistance to fire. The study includes an experimental program to evaluate the behavior of seventeen RC slabs strengthened by using different types of fibers. The load carrying capacity, ductility, and mode of failure of the strengthened specimens were evaluated and the results were compared to control specimens. Results of the experimental program showed that Grancrete PCW paste could be used as an alternative bonding material.
{"title":"Grancrete for Flexural Strengthening of Concrete Structures","authors":"Adolfo J. Obregon-Salinas, S. Rizkalla, P. Zia","doi":"10.14359/51682427","DOIUrl":"https://doi.org/10.14359/51682427","url":null,"abstract":"Synopsis: This paper presents an evaluation of the use of a new innovative cementitious material, commercially known as Grancrete PCW, as an alternative to epoxy for FRP strengthening systems used for reinforced concrete (RC) structures. Grancrete is an environmentally friendly material that develops high early bond strength and possesses an excellent resistance to fire. The study includes an experimental program to evaluate the behavior of seventeen RC slabs strengthened by using different types of fibers. The load carrying capacity, ductility, and mode of failure of the strengthened specimens were evaluated and the results were compared to control specimens. Results of the experimental program showed that Grancrete PCW paste could be used as an alternative bonding material.","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126569721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Ding, H. Seliem, S. Rizkalla, Gang Wu, Zhishen Wu
Synopsis: This paper describes an experimental program undertaken to study the behavior and effectiveness of using Carbon Fiber Reinforced Polymer(CFRP)Grid, as an alternative for steel spirals to confine precast concrete piles. The research focuses on the effectiveness of the confinement of the specified C-Grid on the concrete core of piles. The experimental program consists of a total of seven short piles including one without confinement, two with steel spiral and four with C-Grid. The parameters included in the study were the number of grid layers, the overlap length, and the spacing between the circumferential wires of C-Grid. All the specimens were subjected to concentric axial compression up to failure. Results indicate that the specified C-Grid can provide equivalent performance or more than typical spiral steel reinforcement for precast prestressed concrete piles. The paper also presents an analytical model to predict the performance of piles reinforced with C-Grid as spiral reinforcement. The analytical model yields results that match well with the experimental results.
{"title":"Behavior of Concrete Piles Confined with CFRP Grid","authors":"L. Ding, H. Seliem, S. Rizkalla, Gang Wu, Zhishen Wu","doi":"10.14359/51682421","DOIUrl":"https://doi.org/10.14359/51682421","url":null,"abstract":"Synopsis: This paper describes an experimental program undertaken to study the behavior and effectiveness of using Carbon Fiber Reinforced Polymer(CFRP)Grid, as an alternative for steel spirals to confine precast concrete piles. The research focuses on the effectiveness of the confinement of the specified C-Grid on the concrete core of piles. The experimental program consists of a total of seven short piles including one without confinement, two with steel spiral and four with C-Grid. The parameters included in the study were the number of grid layers, the overlap length, and the spacing between the circumferential wires of C-Grid. All the specimens were subjected to concentric axial compression up to failure. Results indicate that the specified C-Grid can provide equivalent performance or more than typical spiral steel reinforcement for precast prestressed concrete piles. The paper also presents an analytical model to predict the performance of piles reinforced with C-Grid as spiral reinforcement. The analytical model yields results that match well with the experimental results.","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125531344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design Guidance for Blast Resistant Reinforced Concrete and Masonry Components Retrofitted With FRP","authors":"C. Oswald, K. El-Domiaty, M. Bazan","doi":"10.14359/51682455","DOIUrl":"https://doi.org/10.14359/51682455","url":null,"abstract":"","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132295984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Freeze-Thaw Cycling and Sustained Load on FRP-Concrete Interface","authors":"Jiawei Shi, Hong Zhu, Zhishen Wu, Gang Wu","doi":"10.14359/51682473","DOIUrl":"https://doi.org/10.14359/51682473","url":null,"abstract":"","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114688816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"FRP versus Fiber Reinforced Cementitious Mortar Systems at Elevated Temperature","authors":"L. Bisby, T. Stratford, Joanna Smith, S. Halpin","doi":"10.14359/51682459","DOIUrl":"https://doi.org/10.14359/51682459","url":null,"abstract":"","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134098248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper deals with the shear strengthening of reinforced concrete (RC) beams using externally bonded (EB) fiber-reinforced polymers (FRP). The parameters that have the greatest influence on the shear behavior of RC members strengthened with EB FRP and the role of these parameters in current design codes are reviewed. The effect of transverse steel on the shear contribution of FRP was found significant and yet is not captured by any existing codes or guidelines. Therefore, a new design method is proposed, which considers the effect of transverse steel as well as to other influencing factors on the shear contribution of FRP (Vfrp). The accuracy of the proposed equations is verified by predicting the shear strength of experimentally tested RC beams using data collected from literature.
{"title":"Shear Strengthening of RC Beams with EB FRP: Evolutive Model versus Code","authors":"A. Mofidi, O. Chaallal","doi":"10.14359/51682442","DOIUrl":"https://doi.org/10.14359/51682442","url":null,"abstract":"This paper deals with the shear strengthening of reinforced concrete (RC) beams using externally bonded (EB) fiber-reinforced polymers (FRP). The parameters that have the greatest influence on the shear behavior of RC members strengthened with EB FRP and the role of these parameters in current design codes are reviewed. The effect of transverse steel on the shear contribution of FRP was found significant and yet is not captured by any existing codes or guidelines. Therefore, a new design method is proposed, which considers the effect of transverse steel as well as to other influencing factors on the shear contribution of FRP (Vfrp). The accuracy of the proposed equations is verified by predicting the shear strength of experimentally tested RC beams using data collected from literature.","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133316048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Synopsis: Concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) system is one of the most promising technique to protect the reinforced concrete structures from aggressive environmental conditions. Most of the experimental investigations which have been conducted on CFFT columns under compression load were on unreinforced and short concrete stubs. This paper presents the results of an experimental investigation on the strength and behavior of thirteen RC and CFFT columns. The effect of two parameters and their interactions on the buckling behavior were investigated; namely, the type of internal reinforcement (steel or CFRP bars) and the slenderness ratio. The eleven CFFT columns of different slenderness ratio 4, 8, 12, 16 and 20 were tested under pure compression load. Also, two spiral-steel reinforced concrete columns were introduced in the test matrix as control specimens. Filament-winded FRP tubes were used as a stay-inplace structural formwork for CFFT columns. The internal diameter and the thickness of the FRP tubes are 152 mm and 2.65 mm, respectively. Also, the fiber orientations are mainly in the hoop direction. The uniaxial compressive strength of steel and CFRPreinforced CFFT columns was reduced by 13% to 32% with increasing the slenderness ratio from 4 to 20. The CFRP bars can be used as a longitudinal reinforcement for CFFT columns, and their behavior as a compression reinforcement was generally similar to that reinforced with steel bars. The test results indicated that the axial capacity of CFRPreinforced CFFT columns is 13% lower compared to steel-reinforced CFFT columns.
{"title":"Axial Behavior of Slender-Concrete-Filled FRP-Tube Columns Reinforced With Steel and Carbon-FRP Bars","authors":"R. Masmoudi, H. Mohamed","doi":"10.14359/51682468","DOIUrl":"https://doi.org/10.14359/51682468","url":null,"abstract":"Synopsis: Concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) system is one of the most promising technique to protect the reinforced concrete structures from aggressive environmental conditions. Most of the experimental investigations which have been conducted on CFFT columns under compression load were on unreinforced and short concrete stubs. This paper presents the results of an experimental investigation on the strength and behavior of thirteen RC and CFFT columns. The effect of two parameters and their interactions on the buckling behavior were investigated; namely, the type of internal reinforcement (steel or CFRP bars) and the slenderness ratio. The eleven CFFT columns of different slenderness ratio 4, 8, 12, 16 and 20 were tested under pure compression load. Also, two spiral-steel reinforced concrete columns were introduced in the test matrix as control specimens. Filament-winded FRP tubes were used as a stay-inplace structural formwork for CFFT columns. The internal diameter and the thickness of the FRP tubes are 152 mm and 2.65 mm, respectively. Also, the fiber orientations are mainly in the hoop direction. The uniaxial compressive strength of steel and CFRPreinforced CFFT columns was reduced by 13% to 32% with increasing the slenderness ratio from 4 to 20. The CFRP bars can be used as a longitudinal reinforcement for CFFT columns, and their behavior as a compression reinforcement was generally similar to that reinforced with steel bars. The test results indicated that the axial capacity of CFRPreinforced CFFT columns is 13% lower compared to steel-reinforced CFFT columns.","PeriodicalId":375782,"journal":{"name":"SP-275: Fiber-Reinforced Polymer Reinforcement for Concrete Structures 10th International Symposium","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125875240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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