SHORT-TERM DEFORMATIONAL ANALYSIS OF PRESTRESSED CONCRETE BEAMS USING FLEXURAL CONSTITUTIVE MODEL

In this paper, an attempt has been made to extend application of the recently proposed Flexural constitutive model to short-term deformational analysis of flexural prestressed concrete members. The relationship of tensile concrete is based on smeared crack approach and accumulates cracking and the tension stiffening effects. The Flexural constitutive model was applied in a simple engineering technique based on principles of strength of materials and the layered approach. To assess accuracy of the technique, deflections have been calculated for experimental prestressed concrete beams reported in the literature. Comparison has been earned out with the predictions of the well-known design code methods of different countries.

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Experimental Study on Anchoring Bond Behavior of Pre-Tensioned Prestressed Concrete Beams with Corroded Steel Strands

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.304 ◽

2011 ◽

Vol 243-249 ◽

pp. 304-307

Author(s):

Fu Min Li ◽

Xiao Fei Shi ◽

Fu Ping Jia

Keyword(s):

Experimental Study ◽

Bond Strength ◽

Prestressed Concrete ◽

Concrete Beams ◽

Load Test ◽

Structural Behavior ◽

Short Term ◽

Bond Behavior

To study the influence of steel strands corrosion on the bond behavior for anchoring of pre-tensioned prestressed concrete beams, nine specimens were fabricated. Of which, 5 beams were mixed with salt and set in different places to be corroded in different intensity for 13 months. Then the load test was held to all the 9 specimens and the load-slip curves were obtained. The results show that under the condition of no corrosion crack, the short-term anchoring bond strength of pre-tensioned prestressed concrete beams increases for the steel strands corrosion. Because the tension behavior of steel strands deteriorates remarkably even if the corrosion is slight, which is the dominant cause for the degradation of fundamental structural behavior, the influence of steel strands corrosion on the bond behavior for anchoring may be ignored.

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Theoretical Study on Short-Term and Long-Term Deflections of Fiber Reinforced Polymer Prestressed Concrete Beams

Journal of Composites for Construction ◽

10.1061/(asce)1090-0268(2003)7:4(285) ◽

2003 ◽

Vol 7 (4) ◽

pp. 285-291 ◽

Cited By ~ 12

Author(s):

Patrick X. W. Zou

Keyword(s):

Prestressed Concrete ◽

Theoretical Study ◽

Concrete Beams ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Short Term ◽

Reinforced Polymer

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Acoustoelastic effects on the resonance frequencies of prestressed concrete beams—Short-term measurements

NDT & E International ◽

10.1016/j.ndteint.2012.04.010 ◽

2012 ◽

Vol 50 ◽

pp. 36-41 ◽

Cited By ~ 9

Author(s):

Peter Lundqvist ◽

Nils Rydén

Keyword(s):

Prestressed Concrete ◽

Concrete Beams ◽

Short Term ◽

Resonance Frequencies

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Low temperature behaviour of CFRP prestressed concrete beams

Canadian Journal of Civil Engineering ◽

10.1139/l96-050 ◽

1996 ◽

Vol 23 (2) ◽

pp. 464-470 ◽

Cited By ~ 7

Author(s):

Paul E. Bryan ◽

Mark F. Green

Keyword(s):

Low Temperature ◽

Carbon Fibre ◽

Prestressed Concrete ◽

Concrete Beams ◽

High Strength ◽

Experimental Program ◽

Short Term ◽

Cold Regions ◽

Reinforced Plastic ◽

Short Term Exposure

The corrosion of steel prestressing tendons exposed to deicing salts is increasingly becoming a significant problem in Canada. New fibre reinforced plastic (FRP) materials with high strength-to-weight ratios and noncorrosive characteristics are strong alternatives to solve this problem. Carbon fibre reinforced plastic (CFRP) is one of the most promising among available FRPs. Nevertheless, for CFRP rods to gain acceptance in Canada and other cold regions, their behaviour at low temperatures must be investigated. This paper describes an investigation of the feasibility of using CFRP LEADLINE rods to prestress concrete beams. The results of an experimental program on the short-term behaviour of CFRP prestressed concrete beams at low temperature (−27 °C) are discussed. A simple analytical model is used to predict the flexural response of CFRP beams at low temperature. The experimental results agree well with the analytical predictions. The behaviour of the CFRP tendons is shown to be unaffected by short-term exposure to this low temperature. Key words: carbon fibre, fibre reinforced plastic (FRP), advanced composite materials, prestressed concrete, low temperature, cold regions.

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