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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 73 Abstracts search results
Document:
SP275-58
Date:
March 1, 2011
Author(s):
Radhouane Masmoudi and Hamdy Mohamed
Publication:
Symposium Papers
Volume:
275
Abstract:
This paper presents the results of an experimental investigation on the strength and behavior of thirteen RC and CFFT columns. The effects 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. CFFT 152 mm, (6 in.)-diameter columns with different slenderness ratios 4, 8, 12, 16 and 20, were tested under pure compression load. Filament-winded FRP tubes with 2.65 mm (0.10 in.) thickness were used as a stay-in-place structural formwork for the CFFT columns. The axial compressive capacity of steel and CFRP-reinforced CFFT columns was reduced by 13% to 32% with increasing the slenderness ratio from 4 to 20. The behavior of CFRP bars as a compression reinforcement was generally similar to conventional steel bars. The test results indicated that the axial capacity of CFRP-reinforced CFFT columns is 13% lower compared to steel-reinforced CFFT columns.
DOI:
10.14359/51682468
SP275-30
Rajan Sen, Gray Mullins, Julio Aguilar and Danny Winters
The poor performance of conventional chip and patch methods for repairing corrosion damaged piles has led to renewed interest in the use of fiber reinforced polymers (FRP). Over the past decade, laboratory research complemented by numerous field demonstration projects has led to improvements in the design, construction and monitoring of FRP pile repair. The two principal areas of advancement were in the development of techniques borrowed from the composites industry for improving FRP-concrete bond and in the incorporation of a sacrificial anode cathodic protection system within a FRP wrap. Both developments enhance the competitiveness of FRP pile repair. This paper provides an overview of laboratory and field demonstration studies in recent years that led to these advancements.
10.14359/51682440
SP275-52
A. Palmieri, S. Matthys and L. Taerwe
The use of near surface mounted (NSM) fiber reinforced polymers (FRPs) is being increasingly recognized as a valid technique strengthening of concrete members. In case of elevated temperature or fire exposure however, the bond between the bars and the concrete will be lost very quickly due to the adhesive’s low glass transition temperature. Although recent studies have shown that the fire endurance of appropriately designed and insulated FRP strengthened RC members is satisfactory, the performance of FRP strengthening systems at high temperature remains largely unknown. To study the bond behaviour at elevated temperature between the NSM FRP bars and concrete a series of 18 double bond shear tests were performed at Ghent University. Results show that the failure load of NSM FRP strengthened concrete structures and the bond strength are influenced at values of temperature equal to or beyond the glass transition temperature. Failure mode changed by increasing the temperature.
10.14359/51682462
SP275
Editors: Rajan Sen, Rudolf Seracino, Carol Shield, Will Gold / Sponsored by Committee 440
This volume contains 72 papers from the 10th International Symposium held in Tampa, FL. The papers address internally reinforced members, strengthening of columns, material characterization, bond, emerging fiber-reinforced polymer (FRP) systems, shear strengthening, fatigue and anchorage systems, masonry, extreme events, applications, durability, and strengthening. The papers emphasize the experimental, analytical, and numerical validations of using FRP composites and are aimed at providing insights needed for improving existing guidelines. The increasing maturity and acceptance of FRP is reflected by several papers that provide background information on the recent design codes and guidelines relating to blast and seismic repair. New frontiers of FRP research are explored, addressing emergin materials, and systems and applications for extreme events, such as fires and earthquakes, which will further consolidate FRP’s preeminent position. Note: The individual papers are also available. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP-275
10.14359/51682356
SP275-17
Adolfo J. Obregon-Salinas, Sami H. Rizkalla, and Paul Zia
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.
10.14359/51682427
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