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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 27 Abstracts search results
Document:
SP215-25
Date:
August 1, 2003
Author(s):
J. G. Tumialan, D. Torrealva, E. Pasquel, and A. Nanni
Publication:
Symposium Papers
Volume:
215
Abstract:
The earthquake of June 23, 2001, that affected most of the southern part of Peru, put in evidence the seismic vulnerability of icons of the cultural heritage of the country. The historical downtown of the city of Arequipa (located at 1000 km to the South of Lima) was heavily affected by the earthquake, with forty percent of its representative buildings suffering damage ranging from moderate to severe with partial collapse. The towers of the cathedral of Arequipa, built integrally with a volcanic stone called sillar, suffered extensive damage. As a consequence, the left tower partially collapsed, whereas, the right tower remained standing but in an unstable condition. This paper describes the reinforcing strategy of the right tower with Carbon Fiber Reinforced Polymer (CFRP) laminates, which were used to provide tensile strength and confinement to the central stone core of the tower. After completing the CFRP installation, carved stones were placed on top of the laminates to keep the original appearance.
DOI:
10.14359/12880
SP215-26
J. G. Tumialan, N. Galati, A. Nanni, and D. Tyler
Fiber reinforced polymer (FRP) composites in the form of laminates or bars have been proven to be effective for the strengthening of unreinforced masonry (URM) walls subjected to overstresses. Two installation techniques have been proposed: externally-bonded FRP laminates (i.e. manual lay-up or adhesion of pre-cured laminates) and near surface mounted (NSM) FRP bars. The latter technique consists of placing a bar in a groove cut into the surface of the member being strengthened. This paper presents a field application on flexural strengthening with NSM FRP bars of two cracked URM walls in an educational facility. Design considerations and the results of an experimental program conducted to validate the strengthening are described.
10.14359/12881
SP215-07
A. A. Huckelbridge, Jr. and A. K. Eitel
The corrosion resistance of fiber-reinforced polymers, in addition to their high-strength and lightweight, makes them a promising alternative to traditional steel reinforcement in bridge decks. In cooperation with the Cuyahoga County (Ohio) Engineering Department, a health monitoring system is being implemented on a 3500 square foot replacement concrete bridge deck reinforced completely with glass FRP reinforcing bars. The monitoring system incorporates dynamic and environmental data sampling, occurring on a quarterly basis. Instrumentation includes strain gages, temperature probes, and displacement transducers. This bridge deck represents one of the first utilizations of FRP reinforcing bars on an Ohio bridge. The investigation, at its conclusion, will serve as a valuable record of composite behavior and may foster broader use in area bridge decks.
10.14359/12862
SP215-08
J.-H. Choi and H.-L. Chen
Substitution of conventional steel reinforcing rebars with Glass Fiber Reinforced Polymer (GFRP) rebars in Continuously Reinforced Concrete Pavement (CRCP) gives solutions to the problems caused by corrosion of reinforcement. Concrete volume change, due to shrinkage and temperature variations is known to cause crack development in CRCP. In this study, the stress levels in concrete and GFRP rebars and the crack widths at various crack spacings are predicted using numerical methods. The results reveal that using GFRP rebars as reinforcement in CRCP reduces the tensile stress in concrete. The bond-slip between concrete and reinforcement and the friction from the pavement's subbase have important effects on the development of the reinforcement's stresses and the crack widths. The design of a GFRP-reinforced CRCP to be constructed during this year is proposed. The behavior of the CRCP due to concrete shrinkage and temperature variation is predicted. The stress levels in the GFRP reinforcement, the crack width and the crack spacing of the proposed pavement are shown to be within the design requirements.
10.14359/12863
SP215-03
G. P. Terrasi and J. M. Lees
Aspects of the design and installation of a novel carbon fibre reinforced polymer (CFRP) prestressed high strength concrete lighting column (Carbolith®) are presented. The tapered cylindrical columns have a nominal height of 8 m and contain an opening above the foundation to allow for the insertion of the lamp fuse box. The bending/torsion behaviour of a total of five full-scale prototype columns was tested in accordance with the relevant European standards (EN). In the experimental programme, the location of the fuse box opening relative to the loading direction was varied. All five poles fulfilled the EN serviceability and ultimate limit state requirements for lighting columns in pedestrian and/or low speed lightly trafficked areas. This successful outcome has lead to the first field application of the CFRP prestressed concrete lighting columns.
10.14359/12858
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