Evaluation of residual flexural capacity of existing pre-cast pre-stressed concrete panels—A case study

Kiviste, Mihkel; Miljan, Jaan

doi:10.1016/j.engstruct.2010.07.011

Cited by 8 publications

(1 citation statement)

References 5 publications

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“…Many researchers have studied the corrosion behavior of PC structures [23][24][25]. Studies revealed that strand corrosion decreases the ultimate strength and the ductility of pretensioned members [26,27]. Strand corrosion will a ect the structural stability in terms of prestress loss, strength degradation, structural cracking, and failure of structures [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Stress Corrosion Behavior of Ungrouted Pretensioned Concrete Beams

Saraswathy

Lee

Karthick

et al. 2018

Advances in Materials Science and Engineering

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Prestressed concrete beams of size 150 × 150 × 1000 mm were designed, and two bonded cold-drawn 7 mm steel wires were stressed at 70% UTS under service conditions before concreting. e beams were cast with M40 grade concrete mix with various percentages of chlorides ranging from 0, 1, 2, and 3% by weight of cement and cured for 28 days. After 28 days, the stretching forces were released, the prestressing steel wire was allowed to regain its original length, the tensile stresses were transformed into a compressive stress in the concrete, and the stress corrosion behavior was assessed. Stress corrosion cracking (SCC) is due to the simultaneous action of stress, corrosive media, and material properties. e stress corrosion behavior of ungrouted pretensioned steel was assessed by using various electrochemical techniques such as electrochemical noise, open-circuit potential measurement, AC impedance, and potentiodynamic polarization measurements. e same experiments were conducted for rebars embedded in the concrete beam with various percentages of chlorides ranging from 0, 1, 2, and 3% by weight of chloride. After 30 days of exposure, the beams were tested for their flexural strength measurements to find out the load-bearing capacity.

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Section: Introductionmentioning

confidence: 99%

Stress Corrosion Behavior of Ungrouted Pretensioned Concrete Beams

Saraswathy

Lee

Karthick

et al. 2018

Advances in Materials Science and Engineering

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Bearing Capacity Prediction of Corroded PT Beams Incorporating Grouting Defects and Bond Degradation

Wang

2023

Strand Corrosion in Prestressed Concrete Structures

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Corrosion can reduce the sectional area of strand, induce concrete cracking, and degrade bond strength, which can further decrease the bearing capacity of prestressed concrete beams. First, an analytical model is proposed to predict the flexural bearing capacity of partially ungrouted post-tensioned concrete beams. Then, a prediction model of corroded prestressed concrete beams is established to calculate the incompatible deformation between strand and concrete under different load conditions.

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