Bond Performance of GFRP Reinforcing Bars under Uniform or Gradient Temperature Distributions

2021 ◽  
Vol 25 (6) ◽  
Author(s):  
Arshia Mousavi ◽  
Hamzeh Hajiloo ◽  
Mark F. Green
Keyword(s):  
Reinforcing Bars ◽  
Bond Performance ◽  
Temperature Distributions

Experimental Study on Bond Behavior of GFRP-to-Cement Mortar

2011 ◽  
Vol 94-96 ◽  
pp. 543-546
Author(s):  
Ning Zhang ◽  
Ai Zhong Lu ◽  
Yun Qian Xu ◽  
Pan Cui
Keyword(s):  
Aluminium Alloy ◽  
Cement Mortar ◽  
Bond Stress ◽  
Reinforcing Bars ◽  
Bond Performance ◽  
Gfrp Bars ◽  
Pull Out ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Average Bond

Direct pull-out tests were performed to evaluate the bond performance of glass fiber-reinforced polymer (GFRP) reinforcing bars in cement mortar. Specimens with different bar diameters and different grouted lengths (i.e., 5d, 10d and 15d, d is the diameter of bars) are prepared for the pull-out tests. For comparison, specimens with plain aluminium alloy bars (AAB) were tested as well. The result shows that the average bond stress between plain aluminium alloy bars and cement is much smaller than that between the deformed GFRP bars and cement; thin GFRP bars tended to have larger average bond stress; the shorter the grouted length, the smaller the maximum average bond stress. Only part of grouted length undertakes the bond stress and the length depends on the shear modulus of GFRP and the surrounding material.

Bond performance of reinforcing bars in inorganic polymer concrete (IPC)

2007 ◽  
Vol 42 (9) ◽  
pp. 3107-3116 ◽  
Author(s):  
M. Sofi ◽  
J. S. J. van Deventer ◽  
P. A. Mendis ◽  
G. C. Lukey
Keyword(s):  
Inorganic Polymer ◽  
Polymer Concrete ◽  
Reinforcing Bars ◽  
Bond Performance

scholarly journals Effect of High Temperature on the Bond Performance of Reinforcing Bars in Inorganic Polymer Concrete

2018 ◽  
Vol 16 (2) ◽  
pp. 75-83 ◽  
Author(s):  
Huiguo Chen ◽  
Guocui Liu ◽  
Junru Ren ◽  
Ting Zhong ◽  
Miaoshuo Wang
Keyword(s):  
High Temperature ◽  
Inorganic Polymer ◽  
Polymer Concrete ◽  
Reinforcing Bars ◽  
Bond Performance

Discussion on Anchor Structures’ Deterioration Analysis Parameter Caused by Reinforcement Corrosion under Erosion Environment Condition

2012 ◽  
Vol 268-270 ◽  
pp. 827-830
Author(s):  
Wan Tao Ding ◽  
Jin Hui Liu ◽  
Shu Cai Li
Keyword(s):  
Finite Element ◽  
Mechanical Performance ◽  
Strength Reduction ◽  
Reinforcement Corrosion ◽  
Reinforcing Bars ◽  
Underground Engineering ◽  
Support Structure ◽  
Cross Sectional ◽  
Bond Performance

Because of long-term chloride erosion and alternate drying-wetting effect, anchorage support structure of underground engineering is liable to reinforced corrosion and its strength is decreased. According to previous research theory and test results, reinforced corrosion to deteriorate load-bearing role of anchorage support structure system is studied by means of numerical analysis FLAC3D and idea of finite element strength reduction. The results are as follows: (1) losses in the anchor structural performance in underground engineering with corroded reinforcements are caused by three factors: losses in the effective cross-sectional area of anchoring body, losses in the mechanical performance of reinforcing bars and losses in the bond performance of anchoring body. (2) Based on reinforcement mechanical model in FLAC3D, deterioration of mechanical performance of anchor structures caused in underground engineering was analyzed due to reinforcement corrosion. And according to idea of finite element strength reduction and results of laboratory test, deterioration analysis parameter caused by corrosion can be reduced accordingly. The research results can provide the theory support to analyze corrosion deterioration of anchor structure in underground engineering using numerical simulation.

Bond Performance in Machined Reinforcing Bar for Reinforced Concrete

2012 ◽  
Vol 166-169 ◽  
pp. 828-831
Author(s):  
Crescentino Bosco ◽  
Francesco Tondolo
Keyword(s):  
Reinforced Concrete ◽  
Permanent Deformation ◽  
Reinforcing Bars ◽  
Construction Sites ◽  
Geometrical Properties ◽  
Reinforcing Bar ◽  
Bond Performance ◽  
Pull Out ◽  
The Common ◽  
Different Diameters

Bond between steel and concrete is surely one of the most important aspects in reinforced concrete (r.c.) structures. The structural behavior in general and the formation of the resistant mechanisms in particular, for r.c. structures depends on bond. Normally bond performance has always been related to the relative rib area; in the recent years, a continuous discussion on code specifications regarding the lowering of the limits for the relative rib area (bond index) is under way. The previous values were based on a wide experimental campaign. In general the latter should guarantee a good level of bond in all the common situations. Moreover building industry increased the use of rebar straightening by means of machines used to straighten and shape rebar in coils for use on construction sites. The straightening produces a damage on the ribs that modifies their geometrical properties, essentially due to the action of the rolling line in which a permanent deformation is induced. In the present work, the experimental results of 60 pull-out tests, carried out according with the RILEM testing method, on ribbed reinforcing bars with different reduced rib profile systematically reproducing the straightening process of coil-reinforcing bar produced are shown. Three different diameters are considered: 8, 12 and 16 mm. The behavior in terms of bond strength response is also compared to the Code provisions and then discussed.

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