scholarly journals Shear-strengthening of reinforced & prestressed concrete beams using FRP: Part II — Experimental investigation

2012 ◽  
Vol 6 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Thomas H. -K. Kang ◽  
Moustapha Ibrahim Ary
Keyword(s):  
Experimental Investigation ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Shear Strengthening

Experimental investigation on long-term behavior of prestressed concrete beams under coupled effect of sustained load and corrosion

2020 ◽  
Vol 23 (12) ◽  
pp. 2587-2596
Author(s):  
Jun Yang ◽  
Tong Guo ◽  
Aiqun Li
Keyword(s):  
Experimental Investigation ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
High Stress ◽  
Past Research ◽  
Load Level ◽  
Sustained Load ◽  
Coupled Effect ◽  
Long Term Behavior

Prestressed concrete beams are widely used in construction, while they may be attacked by the corrosion medium during the service. Past research works show that coupled effect of high stress and corrosion can significantly deteriorate the performance of prestressed concrete structures. This article presents an experimental investigation on long-term behavior of prestressed concrete beams under the coupled effect of sustained load and corrosion. During the accelerated corrosion process, six prestressed concrete beams were subjected to different levels of sustained loads, and time-dependent prestress loss and concrete stains were recorded and analyzed. It is observed that the local corrosion (i.e. pitting corrosion) of the steel strands was significantly affected by the sustained load level, and the coupled effect led to more serious damage on the beams than individual sustained load or corrosion. Bending loads were finally applied to investigate the influence of corrosion on flexural capacities of these beams. It was found that the flexural capacities and failure mode of the beams were significantly influenced by corrosion. Meanwhile, the corrosion has more significant effect on tension strength of strands rather than bond strength.

Experiment Study on Dynamic Characteristics of Unbounded Prestressed Concrete Beams

2012 ◽  
Vol 166-169 ◽  
pp. 273-276 ◽  
Author(s):  
Feng Ge Li ◽  
Rong Li
Keyword(s):  
Experimental Investigation ◽  
Dynamic Characteristics ◽  
Prestressed Concrete ◽  
Natural Frequencies ◽  
Concrete Beams ◽  
Test Results ◽  
Experiment Study ◽  
Concrete Crack ◽  
Test Study ◽  
Concrete Damage

An experimental investigation on the dynamic characteristics of unbounded prestressed concrete simply support beams is presented in this study. A total of 3 unbounded prestressed concrete simply support beams were constructed and tested. The main variables considered in the test study were the prestress level, the position of prestressed steel and concrete damage. The test results shows that the natural frequencies and model shape of prestressed concrete beams change with the prestress level and the position of prestressed steel, and that the existence or not of concrete crack have certain effects on the dynamic characteristics of prestressed concrete beams.

Experimental investigation on the shear capacity of prestressed concrete beams using digital image correlation

2015 ◽  
Vol 82 ◽  
pp. 82-92 ◽  
Author(s):  
K. De Wilder ◽  
P. Lava ◽  
D. Debruyne ◽  
Y. Wang ◽  
G. De Roeck ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Shear Capacity ◽  
Image Correlation

PRESTRESSED CONCRETE BEAMS WITH A LONGITUDINAL CAVITY

PCI Journal ◽  
1973 ◽  
Vol 18 (1) ◽  
pp. 39-49
Author(s):  
A. A. Hamoudi ◽  
R. A. Bierweiler ◽  
M. K. S. Phang
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams
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