Exploratory Experimental Study on Fatigue Prestress Loss of Prestressed Concrete Beams

2014 ◽  
Vol 8 (2) ◽  
pp. 37-41 ◽  
Author(s):  
Ding Zeng ◽  
Guo-liang Wang ◽  
Jun Xie ◽  
Xiao-hua Zheng
Keyword(s):  
Experimental Study ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Prestress Loss

Feasibility Study of Prestress Force Prediction for Concrete Beams Using Second-Order Deflections

2018 ◽  
Vol 18 (10) ◽  
pp. 1850124 ◽  
Author(s):  
Marco Bonopera ◽  
Kuo-Chun Chang ◽  
Chun-Chung Chen ◽  
Yu-Chi Sung ◽  
Nerio Tullini
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Flexural Rigidity ◽  
Beam Theory ◽  
Concrete Bridges ◽  
Prestress Loss ◽  
Prestressed Concrete Bridges ◽  
Loss Prediction ◽  
Euler Bernoulli Beam ◽  
Post Tensioned

The safety and sustainability of prestressed concrete bridges can be improved with accurate prestress loss prediction. Considerable loss of the prestress force may imply damages hidden in the bridge. In this study, a prestress force identification method was implemented for concrete beams. Based on the Euler–Bernoulli beam theory, the procedure estimates the prestress force by using one or a set of static displacements measured along the member axis. The implementation of this procedure requires information regarding the flexural rigidity of the beam. The deflected shape of a post-tensioned concrete beam, subjected to an additional vertical load, was measured in a short term in several laboratory experiments. The accuracy of the deflection measurements provided favorable prestress force estimates. In particular, the “compression-softening” theory was validated for uncracked post-tensioned concrete beams.

Experimental Study on Bearing Properties of Self-Compacting Prestressed Concrete Beams

2010 ◽  
Vol 163-167 ◽  
pp. 918-927
Author(s):  
Wei Liu ◽  
Zhen Fu Chen
Keyword(s):  
Experimental Study ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Flexural Members ◽  
Different Types

Five different types of self-compacting unbonded prestressed concrete beams are designed to study the bearing properties of self-compacting prestressed concrete flexural members. And experimental studies are conducted on their cracking loads, flexural strengths, ductility of members and failure forms. The testing results provide references for design and establishing related codes of self-compacting prestressed concrete structures.

Experimental Study on PC Beams Dynamic Performance with the Itial Effective Prestress

2012 ◽  
Vol 268-270 ◽  
pp. 749-752
Author(s):  
Shou Yu Cheng ◽  
Dong Jin Yan ◽  
Yan Zhao Li ◽  
Jin Ming Zhai ◽  
Qing Hua Cai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Dynamic Performance

By the method of plane charge on the tested beams, this paper studied 6 pieces of beams， dynamic performance by 4 time loadings, displayed the deflection waveform curves, measured the bearing ability of beams with different prestress degree, analyzed the effects of the deformed performance and the ductility of the test beams with the different prestress degree. The 6 pieces of PC（prestressed concrete）beams was divided into 2 groups.

A Probabilistic Comparison of Prestress Loss Methods in Prestressed Concrete Beams

PCI Journal ◽  
2004 ◽  
Vol 49 (5) ◽  
pp. 52-69 ◽  
Author(s):  
Christopher G. Gilbertson ◽  
Theresa M. (Tess) Ahiborn
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Prestress Loss

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

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.

Experimental Study on PC Beams Dynamic Performance of Prestress Degree under the Plane Charge Loading

2011 ◽  
Vol 94-96 ◽  
pp. 485-489
Author(s):  
Shou Yu Cheng ◽  
Dong Jin Yan ◽  
Yan Zhao Li ◽  
Jin Ming Zhai ◽  
Qing Hua Cai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Dynamic Performance

By the method of plane charge on the tested beams, this paper studied 6 pieces of beams， dynamic performance by 4 time loadings, displayed the deflection waveform curves, measured the bearing ability of beams with different prestress degree, analyzed the effects of the deformed performance and the ductility of the test beams with the different prestress degree. The 6 pieces of PC（prestressed concrete）beams was divided into 2 groups.

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