Experimental Study of Vacuum Grout Injection Method for Post-Tensioned Prestressed Concrete Structures

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.

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EXPERIMENTAL STUDY ON THE APPLICATION OF HIGH STRENGTH FIBER REINFORCED MORTAR TO PRESTRESSED CONCRETE STRUCTURES

Journal of Japan Society of Civil Engineers Ser E2 (Materials and Concrete Structures) ◽

10.2208/jscejmcs.67.411 ◽

2011 ◽

Vol 67 (3) ◽

pp. 411-429 ◽

Cited By ~ 1

Author(s):

Michihiro SAKURADA ◽

Takuya MORI ◽

Hiroaki OHYAMA ◽

Hiroshi SEKI

Keyword(s):

Experimental Study ◽

Prestressed Concrete ◽

Concrete Structures ◽

High Strength ◽

Fiber Reinforced ◽

High Strength Fiber

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Inspection of Grouting Quality for Grouted Tendon Ducts Using Ground Penetrating Radar Technique

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.639-640.1051 ◽

2013 ◽

Vol 639-640 ◽

pp. 1051-1055 ◽

Cited By ~ 1

Author(s):

Xian Yan Zhou ◽

Jian Luan ◽

Da Hai Zhang

Keyword(s):

Nondestructive Testing ◽

Ground Penetrating Radar ◽

Prestressed Concrete ◽

Concrete Structures ◽

Optimal Methods ◽

Ground Penetrating ◽

Radar Technique ◽

Post Tensioned

With the wide applications of post-tensioned concrete structures, the grouting conditions of tendon ducts are paid more attentions. In order to accurately assess the internal grouting quality of the grouted tendon ducts and certainly guarantee the lifetime of prestressed concrete structures Ground Penetrating Radar (GPR), which is a kind of nondestructive testing (NDT) method, has been applied to inspect and evaluate qualitatively and quantitatively on the grouting defects, respectively. A series of in-house tests were carried out for simulating the defects of tendon ducts by foams with different sizes. The results show that the GPR technic was one of the optimal methods for inspecting the internal grouting quality of grouted tendon ducts for post-tensioned concrete structures.

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An Experimental Study on the Flexural Behavior of Post-Tensioned Concrete Beams with CFRP Tendons

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.351-352.717 ◽

2013 ◽

Vol 351-352 ◽

pp. 717-721 ◽

Cited By ~ 1

Author(s):

Woo Tai Jung ◽

Jong Sup Park ◽

Young Hwan Park

Keyword(s):

Experimental Study ◽

Ultimate Load ◽

Concrete Beams ◽

Concrete Structures ◽

Flexural Behavior ◽

Flexural Performance ◽

Jacking Force ◽

Post Tensioned

The exploitation of FRP tendon necessitates not only to improve the performances of the FRP tendon and anchoring device but also to examine its structural performances by applying it to various structures like concrete structures. This study applies CFRP tendon on internally and externally post-tensioned concrete specimens so as to observe their flexural performance considering the number of tendons and jacking force as test variables. The tests show that the externally post-tensioned specimens undergo lesser cracks with wider distribution of the cracks than the internally post-tensioned specimens with similar jacking force. In addition, the externally post-tensioned specimens with larger number of saddles experience smaller number of cracks with larger distribution. The specimens without saddle and the internally post-tensioned specimens with the same jacking force exhibit similar behavior until the yielding of the reinforcement to show different behaviors from the time at which the eccentricities of the tendons start to vary after yielding. The externally post-tensioned specimens with saddle provide increased crack load compared to the specimens without saddle, with an increase of approximately 25% of the ultimate load.

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