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One-Way Slabs Reinforced with Glass Fiber Reinforced Polymer Reinforcing Bars 用玻璃纤维增强聚合物钢筋加固的单向板
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5629
D. Deitz, I. Harik, H. Gesund
{"title":"One-Way Slabs Reinforced with Glass Fiber Reinforced Polymer Reinforcing Bars","authors":"D. Deitz, I. Harik, H. Gesund","doi":"10.14359/5629","DOIUrl":"https://doi.org/10.14359/5629","url":null,"abstract":"Twelve reinforced concrete deck panels were tested to study the potential of glass fiber reinforced polymer (GFRP) rebars as a replacement for epoxy coated steel (ECS) rebars in concrete bridge decks. Span lengths during testing were 2130 mm and 2740 mm. Three reinforcing schemes were evaluated in the study: an ECS reinforcing scheme, a GFRP reinforcing scheme, and a Hybrid reinforcing scheme with a top reinforcing mat of GFRP rebars and a bottom reinforcing mat of ECS rebars. A shear diagonal tension, failure mode was observed in the testing of the deck panel specimens with GFRP tensile reinforcement. Based on the test results, two equations for predicting shear capacity of GFRP reinforced concrete sections are presented.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89123106","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: 96
Experimental Study of Transfer and Development Length of Fiber Reinforced Polymer Prestressing Strands 纤维增强聚合物预应力链传递与发展长度的实验研究
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5671
Z. Lu, T. Boothby, C. Bakis, A. Nanni
{"title":"Experimental Study of Transfer and Development Length of Fiber Reinforced Polymer Prestressing Strands","authors":"Z. Lu, T. Boothby, C. Bakis, A. Nanni","doi":"10.14359/5671","DOIUrl":"https://doi.org/10.14359/5671","url":null,"abstract":"An experimental study was conducted to determine the transfer length and flexural behavior of fiber-reinforced polymer (FRP) tendons in prestressed concrete beams. Three kinds of nominally 5/16 in (8 mm) diameter FRP tendons were included in the study: Carbon Leadline, Aramid Technora and Carbon Strawman. Thirty beams were pretensioned with a seven-wire steel strand (ST). Transfer length observations from this study were based on concrete strain measurements with a DEMEC gage system. Development length observations were based on three-point flexural tests. Four-point flexural tests were also performed on each material to gain additional understanding of the bond behavior between concrete and the PC reinforcing materials. The \"95% average plateau strain\" method of using concrete strain results was show to be an effective way to determine transfer length. By using appropriate flexural model and extrapolating results from over-reinforced tests to situations where the tendon would actually fail, it was possible to determine development length in this investigation. Despite differences in tendon material properties and prestressing forces, both the measured transfer lengths and the development lengths were almost identical for all tendon materials tested. The development length for FRP tendons was reasonably predicted by the ACI design equation, although transfer length appears to be underestimated.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90352926","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: 2
Will Fiber Reinforced Polymer Composites Ever Change Bridge Engineering? 纤维增强聚合物复合材料会改变桥梁工程吗?
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5634
J. Scalzi, W. Podolny, E. Munley, B. Tang
{"title":"Will Fiber Reinforced Polymer Composites Ever Change Bridge Engineering?","authors":"J. Scalzi, W. Podolny, E. Munley, B. Tang","doi":"10.14359/5634","DOIUrl":"https://doi.org/10.14359/5634","url":null,"abstract":"FRP composite materials have mechanical properties which are beneficial and advantageous for design of bridges. The application of these FRP composite materials are currently being used for demonstration projects for repair/retrofit/rehabilitation of existing bridges and a few for new installations. The future applications of these materials will depend upon the new development of the appropriate material/product standards and performance criteria for special proprietary products. The need for coordinated research projects is outlined for the development of the necessary standards and design requirements. Only with proper documentation will the FRP composites become another material available to the construction marketplace for bridges. An outline for the required research projects is presented for the FRP composites for bridge construction.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"182 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72699144","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: 0
Shear Strengthening of Continuous Reinforced Concrete Beams Using Externally Bonded Carbon Fiber Reinforced Polymer Sheets 外粘接碳纤维增强聚合物薄板连续钢筋混凝土梁的抗剪加固
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5687
A. Khalifa, G. Tumialan, A. Nanni, A. Belarbi
{"title":"Shear Strengthening of Continuous Reinforced Concrete Beams Using Externally Bonded Carbon Fiber Reinforced Polymer Sheets","authors":"A. Khalifa, G. Tumialan, A. Nanni, A. Belarbi","doi":"10.14359/5687","DOIUrl":"https://doi.org/10.14359/5687","url":null,"abstract":"This paper presents the results of an experimental investigation on the response of continuous reinforced concrete (RC) beams with shear deficiencies, strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets. The experimental program consisted of nine full-scale, two-span, continuous beams with rectangular cross section. The tested beams were grouped into three series. Three beams, one from each series, were not strengthened and taken as reference beams, whereas, six beams were strengthened using different schemes. The variables investigated in this study included the amount of steel shear reinforcement, amount of CFRP, wrapping schemes, and ply combination. The experimental results indicated that the contribution of externally bonded CFRP to the shear capacity of continuous RC beams is significant and is dependent on the tested variables. In addition, the test results were used to validate shear design algorithms. The proposed algorithms show good correlation with the test results and provided conservative estimates.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"596 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76790207","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: 36
Effect of Longitudinal Carbon Fiber Reinforced Plastic Laminates on Shear Capacity of Reinforced Concrete Beams 纵向碳纤维增强塑料层合板对钢筋混凝土梁抗剪承载力的影响
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5685
O. Ahmed, D. Gemert
{"title":"Effect of Longitudinal Carbon Fiber Reinforced Plastic Laminates on Shear Capacity of Reinforced Concrete Beams","authors":"O. Ahmed, D. Gemert","doi":"10.14359/5685","DOIUrl":"https://doi.org/10.14359/5685","url":null,"abstract":"A series of R.C. beams were strengthened with carbon-fiber-reinforced plastic (CFRP) laminates and tested in an experimental program to study the influence of the cross-sectional area of the CFRP laminates on the shear capacity of the strengthened beam. The used technique enhances the flexural capacity of the original beam but at the same time may be decrease the shear capacity. The strengthened beams are noticed to behave and fail through various modes. Also a general modified equaition is proposed to predict the load carrying capacity of the strengthened beams taking into account all the existing parameters. The results obtained using the modified equation are discussed and evaluated according to the obtained experimental results.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82403749","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: 48
Performance Evaluation of Fiber Reinforced Polymer Reinforcing Bar Featuring Ductility and Health Monitoring Capability 具有延性和健康监测能力的纤维增强聚合物钢筋性能评价
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5608
A. Belarbi, K. Chandrashekhara, S. Watkins
{"title":"Performance Evaluation of Fiber Reinforced Polymer Reinforcing Bar Featuring Ductility and Health Monitoring Capability","authors":"A. Belarbi, K. Chandrashekhara, S. Watkins","doi":"10.14359/5608","DOIUrl":"https://doi.org/10.14359/5608","url":null,"abstract":"The main objective of this study was to develop a new type of FRP rebar with focus on ductility and health-monitoring issues. One approach to provide ductility was the use of a hybrid FRP reinforcing bar consisting of different types of fibers, which fail at different strains during the load history of the rebar, thereby allowing a gradual failure of the rebar. The rebar was manufactured using pultrusion and filament winding techniques. These techniques have made it possible to embed fiber optic sensors within the reinforcement, for health monitoring, thus protecting the sensor from the harsh concrete environment. Pseudi-ductile behavior was validated through testing of coupon FRP rebar as well as RC beams. Testing of large-scale beams reinforced with the hybrid FRP rebar exhibited remarkable ductility behavior with ductility indices close to that of beams reinforced with steel rebar. Furthermore, the strain measured from the embedded fiber optics replicates the measurement of conventional LVDT and was reliable up to failure of the beams.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85791936","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: 14
Evaluation Systems of Shear Capacity of Reinforced Concrete Members Retrofitted with Carbon Fiber Reinforced Polymer Sheets in Consideration of Bond-Peeling Characteristics 考虑粘结剥落特性的碳纤维增强聚合物板加固钢筋混凝土构件抗剪承载力评价体系
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5682
A. Kamiharako, K. Maruyama, T. Shimomura
{"title":"Evaluation Systems of Shear Capacity of Reinforced Concrete Members Retrofitted with Carbon Fiber Reinforced Polymer Sheets in Consideration of Bond-Peeling Characteristics","authors":"A. Kamiharako, K. Maruyama, T. Shimomura","doi":"10.14359/5682","DOIUrl":"https://doi.org/10.14359/5682","url":null,"abstract":"This paper presents an evaluation method of contribution of continuous fiber sheet to shear capacity of RC members. Different from mild steel, CF sheet is completely elastic up to breaking point without any yielding phenomena. CF sheet works effectively in shear strengthening of concrete members when it is glued on concrete. To evaluate shear contribution of CF sheet rationally, it is necessary to consider bonding and peeling-off behavior of CF sheet. In this paper, we formulate a constitutive model for the interfacial zone between CF sheet and concrete according to the uniaxial test results. Based on this computational model, we propose the evaluation system for shear capacity on RC member retrofitted with CF sheets. The applicability of the proposed methods is verified with test results of RC beams.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"219 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85888305","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: 5
Failure Modes of Sheet Bonded Fiber Reinforced Polymer Applied to Brick Masonry 薄板粘结纤维增强聚合物在砖砌体中的破坏模式
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5632
K. Roko, T. Boothby, C. Bakis
{"title":"Failure Modes of Sheet Bonded Fiber Reinforced Polymer Applied to Brick Masonry","authors":"K. Roko, T. Boothby, C. Bakis","doi":"10.14359/5632","DOIUrl":"https://doi.org/10.14359/5632","url":null,"abstract":"CFRP reinforcement sheets are proposed as reinforcement for unreinforced brick masonry subjected to out of plane loads. The investigation consisted of testing unidirectional sheet bonded carbon fiber as a reinforcing material for brick masonry prisms. Two types of brick and FRP materials were utilized in these experiments. The masonry materials exhibited high and low porosity, indicated by initial rate of absorption tests, while high and low modulus FRP materials were used. Strain gauge and full field photoelastic strain analysis was conducted to obtain a record of the strain transfer from the FRP to the masonry. From this analysis, a finite element model was then constructed to predict the mode and magnitude of failure. Results indicate that shear failure of the brick or debonding of the FRP were the general failure modes of the composite specimens tested. When comparing the results of different brick types, it is seen that, in the molded brick, the failure mode was shear failure of the brick at the end of the FRP reinforcement. In these specimens, it is clearly seen in the photoelastic strain results that strain transfer in the brick occurred in an area adjacent to the FRP. Failure in the extruded brick specimens was governed by the debonding of the FRP at the interface with the prism. It is conjectured that the viscosity of the epoxy and the porosity of the brick, characterized by initial rate of absorption tests, directly affect the bond of the composite structure and, therefore, the failure mode. Photoelastic results reveal that strain transfer does occur at high loads when the FRP remains bonded to the masonry. A linearly elastic finite element model was generated to match the experimental results and predict the failure mode for future design purposes. This model can be used for various configurations of FRP in the future.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88968718","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: 17
Shear Strengthening of AASHTO Bridge Girders Using Carbon Fiber Reinforced Polymer Sheets 碳纤维增强聚合物片材对AASHTO桥梁主梁的抗剪加固
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5692
R. Hutchinson, S. Rizkalla
{"title":"Shear Strengthening of AASHTO Bridge Girders Using Carbon Fiber Reinforced Polymer Sheets","authors":"R. Hutchinson, S. Rizkalla","doi":"10.14359/5692","DOIUrl":"https://doi.org/10.14359/5692","url":null,"abstract":"This paper summarizes research findings on the use of carbon fiber reinforced polymer (CFRP) sheets for shear strengthening of pretensioned AASHTO bridge girders. The research includes an experimental program conducted at the University of Manitoba using scale models of pretensioned concrete girders in composite action with the deck slab. Seven ten meter long beams were strengthened with three different types of CFRP sheets using ten different configurations and were tested to failure at each end. The paper describes the experimental program, test results, failure mechanisms and the effectiveness of each configuration of CFRP sheets. A rational model is introduced to define the contribution of the CFRP sheets to the shear resistance in addition to the contributions provided by the stirrups and the concrete for I-shaped pretensioned concrete members. Test results are used to verify the proposed model.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83533700","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: 30
Development of Continuous Fiber Flexible Reinforcement 连续纤维柔性增强材料的研制
玻璃钢 Pub Date : 1999-08-01 DOI: 10.14359/5609
T. Sugiyama, S. Kouzaki, Yasuhiko Sato, T. Ueda, A. Kobayashi
{"title":"Development of Continuous Fiber Flexible Reinforcement","authors":"T. Sugiyama, S. Kouzaki, Yasuhiko Sato, T. Ueda, A. Kobayashi","doi":"10.14359/5609","DOIUrl":"https://doi.org/10.14359/5609","url":null,"abstract":"The authors have developed a continuous fiber flexible reinforcement (CFFR) which as good workability and can be used as a reinforcement in concrete. It consists of a plastic tube containing continuous fiber bundles and resin. The salient feature of this new material is that it can be easily formed at the construction site. The authors have conducted a study of fabrication methods of the material and an evaluation of its mechanical properties. This paper introduces the material and fabrication methods, and details the tensile strength of a member formed from this material. A member bent into a U shape was subjected to a load test to examine its basic properties. As a result, it was found that even when the material was bent, the applied tensile load was transmitted through it. Also, the load-deflection characteristic of the material and the stress concentration due to bending were influenced by the wall thickness of the plastic tube.","PeriodicalId":68258,"journal":{"name":"玻璃钢","volume":"192 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83451765","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: 4
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