SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures最新文献_第8页

Durability of GFRP Reinforced Concrete in Field Structures GFRP增强混凝土在现场结构中的耐久性

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14898

A. Mufti, M. Onofrei, B. Benmokrane, N. Banthia, M. Boulfiza, J. Newhook, B. Bakht, G. Tadros, P. Brett

{"title":"Durability of GFRP Reinforced Concrete in Field Structures","authors":"A. Mufti, M. Onofrei, B. Benmokrane, N. Banthia, M. Boulfiza, J. Newhook, B. Bakht, G. Tadros, P. Brett","doi":"10.14359/14898","DOIUrl":"https://doi.org/10.14359/14898","url":null,"abstract":"Synopsis: Recently, ISIS Canada studied the durability of GFRP in concrete in several field structures across Canada. The objective of the study was to provide the engineering community with the results of the performance of GFRP materials that have been exposed to the concrete environment in built structures. Cores of GFRP-reinforced concrete were removed from five field structures. Analytical methods, namely optical microscopy, scanning electron microscopy and energy dispersive x-ray, differential scanning calorimetry and infrared spectroscopy, were used to determine the composition of GFRP after being subjected to the alkaline environment of concrete for five to eight years. Three research teams from four Canadian universities performed microanalyses of the GFRP and surrounding concrete independently. Results indicate that no deterioration of GFRP took place in any of the field structures. No chemical degradation processes occurred within the GFRP due to the alkalinity of the concrete. The overall conclusion of the study is that GFRP is durable in concrete. Also, it was concluded that the CHBDC was conservative in its first edition by not permitting GFRP as primary reinforcement. As a result of the study, the second edition of the CHBDC, currently in the final stages of approval, permits the use of GFRP as primary reinforcement.","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":"117144755","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: 49

Influence of Bond Behavior on the Cross Sectional Forces in Flexural RC Members Strengthened with CFRP 粘结性能对碳纤维布加固受弯钢筋混凝土构件截面力的影响

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14852

G. Zehetmaier, K. Zilch

引用次数: 1

FRP-Concrete Bond Behavior: A Parametric Study Through Pull-Off Testing frp -混凝土粘结性能:通过拉脱试验的参数化研究

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14847

B. McSweeney, Maria M. Lopez

引用次数: 25

"Field Installation, Splicing, and Flexural Testing of Hybrid FRP/Concrete Piles" FRP/混凝土混合桩的现场安装、拼接和弯曲试验

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14883

K. Helmi, A. Fam, A. Mufti

{"title":"\"Field Installation, Splicing, and Flexural Testing of Hybrid FRP/Concrete Piles\"","authors":"K. Helmi, A. Fam, A. Mufti","doi":"10.14359/14883","DOIUrl":"https://doi.org/10.14359/14883","url":null,"abstract":"Synopsis: Concrete-filled fiber-reinforced polymer (FRP) tubes (CFFTs) are becoming increasingly popular in pile applications. An experimental program was undertaken to address the drivability and effect of driving forces on CFFT piles as well as the use of splices. In this program, four full-scale piles, 357 mm in diameter, and 13.7 m long, including a spliced pile, were driven into the ground and then extracted. The piles were cut into 6 m portions that were used for beam tests on spliced and unspliced specimens and 0.3 m portions used for material characterization of the FRP tube and push-off tests to evaluate the bond strength between the concrete core and FRP tube. Test results were compared to those of control specimens, which were not subjected to driving forces. In total, six beam tests, 28 push-off tests and 54 tension coupon tests were conducted. Test results indicate that driving forces have marginal effect, about 5% reduction, on the flexural strength of both unspliced and spliced CFFT piles, on bond strength and on the tensile strength of the FRP tube. It is also shown that the mechanical splice used in this study performed well and was capable of developing a moment resistance, 7% higher than that of the CFFT pile.","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":"132208526","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: 13

Performance Evaluation of a Short-Span Bridge Built with FRP Reinforced Concrete Panels 某小跨度玻璃钢混凝土面板桥梁的性能评价

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14888

U. Deza, A. Nanni

{"title":"Performance Evaluation of a Short-Span Bridge Built with FRP Reinforced Concrete Panels","authors":"U. Deza, A. Nanni","doi":"10.14359/14888","DOIUrl":"https://doi.org/10.14359/14888","url":null,"abstract":"Synopsis: This paper describes the evaluation of the in-service performance of a shortspan bridge deck built with FRP reinforced concrete (RC) panels. The Walters Street Bridge consists of nine FRP-RC panels connected with shear keys. The multi-panel bridge deck was monitored for a period of four years by load testing the bridge deck with standard trucks and collecting deflection data. Experimentally derived factors such as stiffness degradation, and load fraction distribution between panels were computed from field deflections and compared with AASHTO provisions and results of an analytical study. The load fraction values, which assess the transverse load distribution, were consistent along the 4-year period. Load tests involving the use of two trucks at the same time were performed in the last year with the purpose of finding the most critical deflection under service load conditions, which was compared to allowable AASHTO live load deflections. Analytical deflections were calculated using ACI guidelines and structural analysis methods. The load tests, as well as the analytical results, revealed that the deflections were well within the recommended AASHTO values.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"60 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":"132240879","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

FRP Application in Underwater Repair of Corroded Piles 玻璃钢在腐蚀桩水下修复中的应用

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14885

R. Sen, G. Mullins, K. Suh, D. Winters

引用次数: 12

Design Equations for FRP–Strengthening of Columns frp加固柱的设计方程

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14881

G. Monti, S. Alessandri

引用次数: 3

Fatigue Behavior of Prestressed Concrete Bridge Girders Strengthened with Various CFRP Systems 不同碳纤维布加固预应力混凝土桥梁梁的疲劳性能

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14856

O. Rosenboom, S. Rizkalla

{"title":"Fatigue Behavior of Prestressed Concrete Bridge Girders Strengthened with Various CFRP Systems","authors":"O. Rosenboom, S. Rizkalla","doi":"10.14359/14856","DOIUrl":"https://doi.org/10.14359/14856","url":null,"abstract":"Synopsis: Carbon Fiber Reinforced Polymer (CFRP) materials provide a solution for the classical challenge facing bridge maintenance engineers: the upgrading of bridges whose service life has been exceeded but due to evolving demands must stay in service. Of particular concern are rural short span prestressed concrete bridges that may be required to carry loads above the initial design value. The CFRP strengthening systems presented in this paper have the potential to increase the ultimate capacity of such bridge girders. This research project is aimed at investigating the fatigue performance of CFRP strengthening systems for prestressed concrete bridge girders. Five 9.14 meter prestressed concrete bridge girders were tested under fatigue loading conditions: one as a control specimen and four strengthened with various CFRP systems including near surface mounted (NSM) bars and strips, and externally bonded sheets and strips. Results show that CFRP strengthened prestressed concrete bridge girders can withstand over two million cycles of fatigue loading equivalent to a 20 percent increase in live load with little degradation.","PeriodicalId":151616,"journal":{"name":"SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures","volume":"118 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":"116109890","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: 15

Shape Modification with Expansive Cement Concrete for Confinement with FRP Composites 玻璃钢复合材料约束膨胀水泥混凝土的形状改性研究

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14880

Zihan Yan, C. Pantelides, L. Reaveley

引用次数: 3

Strengthening of Off-System Bridges with Mechanically Fastened Pre-Cured FRP Laminates 机械紧固预固化玻璃钢层合板加固非体系桥梁

SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures Pub Date : 2005-10-01 DOI: 10.14359/14886

A. Rizzo, N. Galati, A. Nanni

引用次数: 10