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SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures最新文献

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Behavior of RC Beams Strengthened with Externally Post-Tensioning CFRP Strips 体外后张碳纤维布加固RC梁的性能
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14851
K. Choi, Young-chan You, Y.H. Park, J. Park, K. Kim
{"title":"Behavior of RC Beams Strengthened with Externally Post-Tensioning CFRP Strips","authors":"K. Choi, Young-chan You, Y.H. Park, J. Park, K. Kim","doi":"10.14359/14851","DOIUrl":"https://doi.org/10.14359/14851","url":null,"abstract":"Synopsis: Experimental study has been performed in order to investigate the behavior of RC beams strengthened with externally post-tensioning CFRP (Carbon Fiber Reinforced Polymer) strips. A total of 11 specimens have been manufactured of which specimens strengthened with bonded or unbonded CFRP strips considering the level of post-tensioning as experimental variable, and a specimen with simply bonded CFRP strips. The following phenomena have been observed through the experimental results. The specimen with simply bonded CFRP strips failed below 50% of its tensile strength due to premature debonding. On the other hand, all the specimens strengthened with post-tensioning CFRP strips showed sufficient strengthening performance up to the ultimate rupture load of the CFRP strips. Also, it was observed that the cracking loads and yield loads of the strengthened beams were increased proportionally to the posttensioning level, but the ultimate loads were nearly equal regardless of the posttensioning level and bonded or unbonded system. In addition, the yield loads and cracking loads of the beams with bonded post-tensioning systems were increased about 20% compared with those of the unbonded post-tensioning systems. However, the beams strengthened with unbonded post-tensioning CFRP strips showed ductile behaviour with large deflections resulting from the reduced member stiffness.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132604775","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}
引用次数: 3
Shear Strength of Concrete Beams Reinforced with FRP Bars: Design Method FRP筋混凝土梁抗剪强度设计方法
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14875
A. El-Sayed, E. El-Salakawy, B. Benmokrane
{"title":"Shear Strength of Concrete Beams Reinforced with FRP Bars: Design Method","authors":"A. El-Sayed, E. El-Salakawy, B. Benmokrane","doi":"10.14359/14875","DOIUrl":"https://doi.org/10.14359/14875","url":null,"abstract":"Synopsis: ACI Committee 440 has proposed a design approach for evaluating the concrete contribution to the shear resistance of FRP-reinforced concrete beams that accounts for the axial stiffness of FRP longitudinal reinforcement. Recent shear tests conducted on beams longitudinally reinforced with different types and ratios of FRP bars indicate that the current ACI 440.1R-03 shear design approach significantly underestimates the concrete shear strength of such beams. This paper presents a proposed modification to the ACI 440.1R-03 shear design equation. The proposed equation was verified against experimental shear strengths of 98 specimens tested to date, and the calculated values are shown to compare well. In addition, the proposed equation was compared to the major design provisions using the available test results. Better and consistent predictions were obtained using the proposed equation.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115573850","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}
引用次数: 24
Modeling of FRP-Concrete Bond Using Nonlinear Damage Mechanics 基于非线性损伤力学的frp -混凝土粘结模型
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14843
C. Coronado, M. Lopez
{"title":"Modeling of FRP-Concrete Bond Using Nonlinear Damage Mechanics","authors":"C. Coronado, M. Lopez","doi":"10.14359/14843","DOIUrl":"https://doi.org/10.14359/14843","url":null,"abstract":"","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124661937","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}
引用次数: 11
Long-Term Performance of a CFRP Strap Shear Retrofitting System CFRP带剪切加固系统的长期性能研究
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14861
N. Hoult, J. Lees
{"title":"Long-Term Performance of a CFRP Strap Shear Retrofitting System","authors":"N. Hoult, J. Lees","doi":"10.14359/14861","DOIUrl":"https://doi.org/10.14359/14861","url":null,"abstract":"Synopsis: A shear retrofitting method for reinforced concrete (RC) beams has been developed that uses external CFRP straps to provide additional shear capacity. Research has been undertaken to develop an installation technique that allows the CFRP strap to encompass the full depth of the beam, without requiring access to the top surface of the beam. The current testing scheme investigates the durability of the CFRP strap system using the new installation technique. A long-term load test was conducted on a RC T-beam which indicated that the straps continued to provide shear capacity after 7 months under a load equivalent to 80% of the ultimate capacity of the retrofitted beam. A cyclic test conducted on another similar T-beam specimen demonstrated that after 1,000,000 cycles, under a load that varied between 0.5 and 0.8 times the ultimate retrofitted beam capacity, the straps continued to provide effective shear enhancement.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121847438","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}
引用次数: 6
Punching Shear Capacity of Double Layer FRP Grid Reinforced Slabs 双层FRP格栅加筋板的冲剪承载力研究
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14870
David A. Jacobson, L. Bank, M. Oliva, J. Russell
{"title":"Punching Shear Capacity of Double Layer FRP Grid Reinforced Slabs","authors":"David A. Jacobson, L. Bank, M. Oliva, J. Russell","doi":"10.14359/14870","DOIUrl":"https://doi.org/10.14359/14870","url":null,"abstract":"Synopsis: The punching shear capacity of concrete slabs reinforced with threedimensional fiber-reinforced polymer (FRP) double-layer reinforcement cages composed of glass fiber-reinforced pultruded grating elements has been investigated using full-scale experimental tests and a number of different analytical models. Test specimens were full-scale prototype bridge deck slabs with varying end restraint and support conditions, differing dimensions, and two different FRP bar fiber lay-ups. The tests results were compared with the punching shear models in ACI 318, ACI 440, Eurocode 2, BS 8110, CEB-FIB MC90, JSCE, and a number of models proposed in the literature specifically for FRP reinforced slabs. Based on this investigation a new empirical model has been developed to predict the punching shear capacity of double layer grids having either restrained or simply supported edges and including an overlapping splice. The model is shown to give reasonably good predictions for both simply supported and restrained slabs.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128761232","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}
引用次数: 18
Experimental Study of Short NSM–FRP Bar Anchorages NSM-FRP短筋锚固试验研究
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14844
D. G. Novidis, S. Pantazopoulou
{"title":"Experimental Study of Short NSM–FRP Bar Anchorages","authors":"D. G. Novidis, S. Pantazopoulou","doi":"10.14359/14844","DOIUrl":"https://doi.org/10.14359/14844","url":null,"abstract":"","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127007930","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}
引用次数: 3
Fiber Optics Technique for Quality Control and Monitoring of FRPInstallations 光纤技术用于frp装置的质量控制和监测
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14833
V. Antonucci, M. Giordano, A. Prota
{"title":"Fiber Optics Technique for Quality Control and Monitoring of FRPInstallations","authors":"V. Antonucci, M. Giordano, A. Prota","doi":"10.14359/14833","DOIUrl":"https://doi.org/10.14359/14833","url":null,"abstract":"Synopsis: Advantages such as light weight, high mechanical properties and resistance to aggressive and chemical agents, non invasive installation, low tooling and machinery costs, possibility to repair the structure without interrupting its use have determined great expectation on Fiber Reinforced Polymer (FRP) composites for the strengthening of civil structures. However, their diffusion is often limited by the lack of procedures and methods to assess the quality of installations. The main focus of this paper is to present a non destructive methodology based on a fiber optic refractometer for the quality control of FRP wet lay-up systems. After summarizing the basic parameters necessary for monitoring the cure reaction and introducing the principles of the proposed technique, some preliminary experimental tests are discussed. The analysis of laboratory outcomes allows identifying the aspects that need further research before the proposed technique can be implemented as a field tool for quality assessment of FRP installations.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131211113","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}
引用次数: 7
Innovative Application of FRPs for Seismic Strengthening of RC Shear Wall frp在混凝土剪力墙抗震加固中的创新应用
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14893
K. Kobayashi
{"title":"Innovative Application of FRPs for Seismic Strengthening of RC Shear Wall","authors":"K. Kobayashi","doi":"10.14359/14893","DOIUrl":"https://doi.org/10.14359/14893","url":null,"abstract":"Synopsis: The small holes were drilled at the grid intersection on the concrete wall panel. A bundle of aramid strands was passed through the holes so that it sewed them in cross diagonal directions. As a result, the concrete wall panel was shut up into a net made of aramid sewing bands. Shear capacity increased by more than 25%. FRP sewing bands worked as confinement to the concrete under compressive stress rather than the tensile braces. Its performance is expected to be better than that reinforced by FRP sheet wrapping system, and more strengthening effect will be obtained with less amount of fiber material. This strengthening idea is originally proposed to apply it to the infill-brick wall. The concept and the effectiveness of the idea were verified by the tests on the scaled RC shear wall.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131629684","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}
引用次数: 9
Modelling of Debonding Failures in FRP-Strengthened Two-Way Slabs frp加固双向板脱粘破坏模型研究
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14848
W. E. Sayed, U. Ebead, K. Neale
{"title":"Modelling of Debonding Failures in FRP-Strengthened Two-Way Slabs","authors":"W. E. Sayed, U. Ebead, K. Neale","doi":"10.14359/14848","DOIUrl":"https://doi.org/10.14359/14848","url":null,"abstract":"Synopsis: With the development of the technology of strengthening existing concrete structures using externally bonded FRP composites, a number of issues related to the structural behaviour of such structures require investigation. One of the most important issues is the interfacial behaviour between the FRP composite and the concrete as this often controls the failure mode of the strengthened member. Several studies have progressed on the development of appropriate interfacial behaviour (bond–slip) models and on understanding the debonding phenomena. This work focuses on the numerical modelling of FRP-strengthened two-way reinforced concrete slabs where the predominant mode of failure is debonding at the FRP-concrete interface. An appropriate finite element model that represents the interfacial behaviour for FRP-strengthened two-way slabs is presented. The proposed model successfully simulates the different flexural failure modes, particularly those related to the debonding of the FRP sheets. The ultimate load carrying capacity and load–deflection relationships are predicted with reasonable accuracy.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133273803","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}
引用次数: 3
Flexural Behavior of Fiber-Reinforced-Concrete Beams Reinforced with FRP Rebars FRP筋加固纤维混凝土梁的受弯性能
SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14872
H. Wang, A. Belarbi
{"title":"Flexural Behavior of Fiber-Reinforced-Concrete Beams Reinforced with FRP Rebars","authors":"H. Wang, A. Belarbi","doi":"10.14359/14872","DOIUrl":"https://doi.org/10.14359/14872","url":null,"abstract":"Synopsis: The main objective of this study was to develop a nonferrous hybrid reinforcement system for concrete bridge decks by using continuous fiber-reinforcedpolymer (FRP) rebars and discrete randomly distributed polypropylene fibers. This hybrid system has the potential to eliminate problems related to corrosion of steel reinforcement while providing requisite strength, stiffness, and desired ductility, which are shortcomings of the FRP reinforcement system in reinforced concrete structures.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":" 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132041278","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}
引用次数: 71
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