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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 15 Abstracts search results
Document:
SP165-02
Date:
December 1, 1996
Author(s):
D. Van Gemert
Publication:
Symposium Papers
Volume:
165
Abstract:
Research on the design of adhesive bonding plates for strengthening reinforced concrete structural elements is presented in this paper. Different design aspects are covered, including increase of bending strength, calculation of anchoring length of epoxy bonded steel plates, temperature resistance, dowel action, and strengthening of two-way slabs taking into account orthotropic behavior of strengthened slabs. A brief overview of theoretical principles is given. The results of a large experimental program are evaluated according to the theoretical principles and are translated into practical engineering design procedures. The design procedure for strengthening two-way slabs is explained in a practical example.
DOI:
10.14359/1526
SP165-14
Hamid Saadatmanesh, Mohammad R. EhsaniI, and Wei An
Analytical models based on the compatibility of deformations and equilibrium of forces are presented to predict the stresses and deformations in concrete beams strengthened with fiber composite plates epoxy-bonded to the tension face of the beams. The models are given for beams having rectangular and T cross sections. A parametric study is conducted to investigate the effects of design variables, such as plate area, plate stiffness and strength, concrete compressive strength, and steel reinforcement ratio. The moment versus curvature diagrams for various combinations of these variables are plotted and compared. The results indicate that bonding composite plate to a concrete beam can increase the stiffness, yield moment, and flexural strength of the beam. The method is particularly effective for beams with a relatively low steel reinforcement ratio.
10.14359/1475
SP165-13
Hamid Saadatmanesh and Mohammed R. Ehsani
The static strength of reinforced concrete (RC) beams strengthened by gluing glass fiber reinforced plastic (GFRP) plates to their tension flanges is experimentally investigated. Five rectangular beams and one T- beam were tested to failure under four-point bending. The measured load versus strain in GFRP plates, steel reinforcing bars, extreme compression fiber of concrete, and the load versus deflection for the section at midspan of the beams are plotted and compared to the predicted values. The results indicate that the flexural strength of RC beams can be significantly increased by gluing GFRP plates to the tension face. In addition, the epoxy- bonded plates improved the cracking behavior of the beams by delaying the formation of visible cracks and reducing crack widths at higher load levels.
10.14359/1473
SP165-11
Emo Agneloni
This paper shows the application of a new technique called the plate bonding technique to repair damaged structures. The good results obtained show the ability of this technique to solve different structural problems and demonstrated its validity and flexibility from a technical and economic point of view. To have good results, it is necessary to begin with knowledge of the causes of deterioration; therefore, this paper deals with the four main groups of testing methods to analyze these deficiencies. Two examples of research and tests analyzing the applied technique are included which confirm its validity.
10.14359/1471
SP165-10
Ho Nyok Yong, Chieng King Wu, and Sim Moh Wee
Although strengthening by bonded steel plates, where adhesive is used to bond the steel plates to the structural members, has been established for more than two decades, it was not until recently that this strengthening technique has been used in Singapore. A number of reinforced concrete structures have been successfully strengthened using this technique over the last three years. This paper describes this strengthening technique with particular reference to the material selection and design considerations, as well as the strengthening and construction methodologies. A case study on one of the structures strengthened is also presented. The structural members strengthened include bonding of steel plates to beams to increase flexural as well as shear capacities and encasing columns to prevent buckling and increased load carrying capacity.
10.14359/1469
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