Calibration of Bar-Concrete Bond Stress Relationships for Bond Stress Prediction of GFRP Soil Nails Using Experimental Pullout Tests

Document Type : Regular Paper

Authors

1 Ph.D candidate, civil engineering department, Ferdowsi University of Mashhad, Mashhad, Iran

2 Civil Engineering Department, Ferdowsi University of Mashhad

3 Department of Civil Engineering, Ferdowsi University of Mashhad

Abstract

Even though steel bar is a conventional reinforcement in soil stabilization systems, the problem of corrosion of steel may lead to vast damages especially in aggressive environments. In the past decades, Fiber Reinforced Polymer (FRP) materials have offered an effective solution to overcome the corrosion problem. Despite numerous bond stress-displacement models for reinforcements in concrete, there is a lack of models for FRP nails in grout. In this paper, the usability of four bond stress models (Malvar, EPB, CMR and Soroushian) of reinforcements in concrete was evaluated to predict the bond stress of FRP nails in grout. For this purpose, the results of several experimental pullout tests were used to calibrate the reinforcement-concrete bond stress models and the constant parameters were obtained. To evaluate the accuracy of the calibrated models, four statistical criteria of R2, SSE, RMSE and MAPE have been also determined for each model. Results showed that Malvar model with R2 of 0.94 and MAPE of %21 was deemed suitable for the prediction of bond stress of GFRP nails while CMR model is not recommended.

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References

[1]     Xu, K., Ren, C., Deng, Q., Jin, Q., Chen, X. (2018). Real-time monitoring of bond slip between GFRP bar and concrete structure using piezoceramic transducer-enabled active sensing, Sensors, 18: 2653.
[2]     Zhang, C., Zhou, H., Shi, B., Wu, F., Yin, J. (2015). Experimental investigation of pullout behavior of Fiber-Reinforced Polymer reinforcements in sand, Journal of Composite for Construction, 19: 04014062.
[3]     Yan, F., Lin, Z., Wang, X., Azarmi, F., Sobolev, K. (2017). Evaluation and prediction of bond strength of GFRP-bar reinforced concrete using artificial neural network optimized with genetic algorithm, Composite Structures, 161:441-452.
[4]     Refai, A., Abed, F., Altalmas, A. (2014). Bond durability of basalt fiber reinforced polymer bars embedded in concrete under direct pullout conditions, Journal of Composites for Construction.
[5]     El Refai, A., Ammar, M. A., Masmoudi, R. (2014). Bond performance of basalt fiber-reinforced polymer bars to concrete, Journal of Composites for Construction, 19: 04014050.
[6]     Okelo, R., Yuan, R.L. (2005). Bond strength of Fiber Reinforced Polymer rebar in Normal Strength Concrete, Journal of Composites for Construction, 9:203-213.
[7]     Özkal, F. M., Polat, M., Yağan, M., Öztürk, M. O. (2018). Mechanical properties and bond strength degradation of GFRP and steel rebars at elevated temperatures, Construction and Building Materials, 184:45-57.
[8]     Maranan, G., Manalo, A., Karunasena, K., Benmokrane, B. (2015). Bond stress-slip behavior: case of GFRP bars in Geopolymer concrete, Journal of Materials in Civil Engineering, 27:04014116.
[9]     Esfahani, M.R., Rakhshanimehr, M., Mousavi, S.R. (2013). Bond Strength of Lap-Spliced GFRP bars in concrete beams, Journal of Composites for Construction, 17:314-323.
[10]    Mostofinejad, D., Mofrad, M. H., Hosseini, A., Mofrad, H. H. (2018). Investigating the effects of concrete compressive strength, CFRP thickness and groove depth on CFRP-concrete bond strength of EBROG joints, Construction and Building Materials, 189:323-337.
[11]    Liu, H., Yang, J., Wang, X. (2017). Bond behavior between BFRP bar and recycled aggregate concrete reinforced with basalt fiber, Construction and Building Materials, 135:477-483.
[12]    Tekle, B.H., Khennane, A., Kayali, O. (2016). Bond Properties of Sand-Coated GFRP Bars with Fly Ash–Based Geopolymer Concrete, Journal of Composites for Construction, 20:04016025.
[13]    Esfahani, M.R., Kianoush, M.R., Lachemi, M. (2005). Bond strength of Glass Fiber Reinforced Polymer reinforcing bars in Normal and Self-Consolidating Concrete, Canadian Journal in Civil Engineering, 32:553-560.
[14]    Dong, Z.Q., Wu, G., Xu, Y.Q. (2017). Bond and Flexural Behavior of Sea Sand Concrete Members Reinforced with Hybrid Steel-Composite Bars Presubjected to Wet-Dry Cycles, Journal of Composites for Construction, 21:04016095.
[15]    Imjai, T., Guadagnini, M., Pilakoutas, K. (2017). Bond Strength of FRP Bars: Experimental Investigation and Bond Modeling, Journal of Materials in Civil Engineering, 29:04017024.
[16]    Bywalski, C., Drzazga, M., Kaminski, M., Kazmierowski, M. (2016). Analysis of calculation methods for bending concrete elements reinforced with FRP bars, Archives of Civil and mechanical Engineering, 16:901-912.
[17]    Qeshta, I.M., Shafigh, P., Jumaat, M.Z. (2016). Research progress on the flexural behaviour of externally bonded RC beams, Archives of Civil and mechanical Engineering, 16:982-1003.
[18]    Gooranorimi, O., Claure, G., Suaris, W., Nanni, A. (2018). Bond-slip effect in flexural behavior of GFRP RC slabs, Composite Structures, 193:80-86.
[19]    Al-Saadi, N. T. K., Mohammed, A., Al-Mahaidi, R. (2018). Bond performance of NSM CFRP strips embedded in concrete using direct pull-out testing with cementitious adhesive made with graphene oxide, Construction and Building Materials, 162:523-533.
[20]    Bedon, C., Louter, C. (2018). Numerical investigation on structural glass beams with GFRP-embedded rods, including effects of pre-stress, Composite Structures, 184:650-661.
[21]    Carvalho, E.P., Miranda, M.P., Fernandes, D., Victor Alves, G. (2018). Comparison of test methodologies to evaluate steel-concrete bond strength of thin reinforcing bar, Construction and Building Materials, 183:243-252.
[22]    Soroushian, P., Choi, K.B. (1989). Local bond of deformed bars with different diameters in confined concrete, ACI Structural Journal, 86:217–222.
[23]    Eligehausen, R., Popov, E.P., Bertero, V.V. (1982). Local bond stress-slip relationships of deformed bars under generalized excitations, Earthquake Engineering Research Center, University of California, Berkeley.
[24]    Mousavi, S. S., Dehestani, M., Mousavi, K. K. (2017). Bond strength and development length of steel bar in unconfined self-consolidating concrete, Engineering Structures, 131:587-598.
[25]    Esfahani, M.R., Kianoush, M.R. (2005). Development/splice length of reinforcing bars, ACI Structural Journal, 102:22-30.
[26]    Esfahani, M.R., Rangan, B.V. (1998). Local bond strength of reinforcing bars in Normal Strength and High-Strength Concrete (HSC), ACI Structural Journal, 95:96-105.
[27]    Esfahani, M.R., Rangan, B.V. (1998b). Bond between Normal Strength and High-Strength Concrete (HSC) and reinforcing bars in splices in beams, ACI Structural Journal, 95:272-279.
[28]    Soroushian, P., Choi, K.B., Park, G.H., Aslani, F. (1991). Bond of deformed bars to concrete: effects of confinement and strength of concrete, ACI Material Journal, 88:227–232.
[29]    Abrishami, H., Mitchell, D. (1996). Analysis of bond stress distribution in pullout specimens, Journal of Structural Engineering, 122:255-261.
[30]    Ma, Y., Guo, Z., Wang, L., Zhang, J. (2017). Experimental investigation of corrosion effect on bond behavior between reinforcing bar and concrete, Construction and Building Materials, 152:240-249.
[31]    Siamphukdee, K., Zou, R., Collins, F., Shayan, A. (2018). Modeling Steel-Concrete Bond Strength Depletion during Corrosion, ACI Materials Journal, 115.
[32]    Yuan, F., Chen, M. (2018). Numerical sensing of plastic hinge regions in concrete beams with hybrid (FRP and steel) bars, Sensors, 18:3255.
[33]    Achillides, Z., Pilakoutas, K. (2004). Bond behavior of Fiber Reinforced Polymer bars under direct pullout conditions, Journal of Composites for Construction, 8:173-181.
[34]    Tighiouart, B., Benmokrane, B., Gao, D. (1998). Investigation of bond in concrete member with fiber reinforced polymer (FRP) bars, Construction and Building Materials, 12:453-462.
[35]    Yu, S., Zhu, W., Niu, L., Zhou, S., Kang, P. (2019). Experimental and numerical analysis of fully grouted long rockbolt load-transfer behavior, Tunnelling and Underground Space Technology, 85:56-66.
[36]    Liu, H., Tang, L., Lin, P. (2018). Estimation of ultimate bond strength for soil nails in clayey soils using maximum likelihood method, Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, 12:190-202.
[37]    Dybel, P., Furtak, K. (2016). The effect of ribbed reinforcing bars location on their bond with high-performance concrete, Archives of Civil and mechanical Engineering, 15:1070-1077.
[38]    Seo, H.J. Jeong, K.H., Choi, H., Lee, I.M. (2012). Pullout resistance increase of soil nailing induced by pressurized grouting, Journal of Geotechnical and Geoenvironmental Engineering, 138:604-613.
[39]    Lee, S.W., Kim, T.S., Sim, B.K., Kim, J.S., Lee, I.M. (2012). Effect of pressurized grouting on pullout resistance and group efficiency of compression ground anchor, Canadian Geotechnical Journal, 49:939-953.
[40]    Su, L.J., Yin, J.H., Zhou, W.H. (2010). Influences of overburden pressure and soil dilation on soil nail pull-out resistance, Computers and Geotechnics, 37:555-564.
[41]    Xu, D. S., Liu, H. B., Luo, W. L. (2018). Evaluation of interface shear behavior of GFRP soil nails with a strain-transfer model and distributed fiber-optic sensors, Computers and Geotechnics, 95:180-190.
[42]    Zhang, B., Benmokrane, B., Ebead, U.A. (2006). Design and evaluation of Fiber-Reinforced Polymer bond-type anchorages and ground anchors, International Journal of Geomechanics, 6:166-175.
[43]    Zou, W.L., Wang, X.Q., Vanapalli, K. (2016). Experimental evaluation of engineering properties of GFRP screw anchors for anchoring applications, Journal of Materials in Civil Engineering, 28:04016029.
[44]    Kou, H.l., Guo, W., Zhang, M.Y. (2015). Pullout performance of GFRP anti-floating anchor in weathered soil, Tunneling and underground space technology, 49:408-416.
[45]    Zheng, J.J., Dai, J.G. (2014). Analytical solution for the full-range pull-out behavior of FRP ground anchors, Construction and Building materials, 58: 129-137.
[46]    Malvar, LJ. (1994). Bond stress-slip characteristics of FRP rebar, Naval Facilities Engineering Service Center, California.
[47]    Cosenza, E., Manfredi, G., Realfonzo, R. (1995). Analytical modelling of bond between FRP reinforcing bars and concrete, In: Nonmetallic (FRP) reinforcement for concrete structures, E&FN Spon, London, 164–171.
[48]    Devore, J.L. (2011). Probability and Statistics for Engineering and the Sciences, Cengage Learning, 8th edition, Boston.
[49]    Barnston, A. (1992). Correspondence among the Correlation [root mean square error] and Heidke Verification Measures; Refinement of the Heidke Score, Notes and Correspondence, Climate Analysis Center.
[50]    Gnananandarao, T., Dutta, R. K., Khatri, V. N. (2019). Application of Artificial Neural Network to Predict the Settlement of Shallow Foundations on Cohesionless Soils, Geotechnical Applications, 13:51-58

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  • Receive Date: 01 June 2018
  • Revise Date: 28 March 2019
  • Accept Date: 19 April 2019

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