Abstract
Recently, a steel plate concrete composite technique has been developed for the shear strengthening of RC bridges. The steel plate shear-strengthened (SPSS) beam is composed of an old RC beam, new concrete, and steel web. To investigate the shear behavior of SPSS beams strengthened in the shear span, six SPSS beams and four RC beams were tested. The test results showed that the failure mode of the SPSS beams was peeling failure at the interface between the old concrete and new concrete. The proposed technique showed a significantly enhanced shear capacity even when the tensile strength of the interface between the old and new concrete was relatively low. The initial interface failure appeared at the loading point, support, and corner of the new concrete and then expanded to the entire shear span. A finite-element (FE) model of the SPSS beam was established with the use of the FE software MSC.Marc, and the cohesive element was used to model the interface between the old and new concrete. The modeling scheme, material constitutive law, and material parameters are illustrated in this article. The results of the proposed FE model were found to agree fairly well with the test results in terms of the overall load-displacement curve, ultimate shear capacity, and interface failure pattern. Based on the FE model, the shear force contribution of the old concrete, new concrete, and steel web were decomposed with sufficient accuracy. The effects of the ratio of shear span to depth, material strength, and interface strength were investigated by an FE parametric analysis, and the interface strength between the old and new concrete was found to be the most important parameter. The shear contribution of the steel web was mainly affected by the interface strength. Finally, 1,296 elaborate FE models of SPSS beams were established with the use of MSC.Marc, and a practical design formula considering peeling failure with a reasonable level of accuracy was developed.
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Acknowledgments
The writers gratefully acknowledge the financial support of the National Natural Science Foundation of China (Grant 51722808) and the Beijing Natural Science Foundation (Grant 8162023).
References
ACI (American Concrete Institute). 2008. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. ACI 440.2 R-08. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2014. Building code requirements for structural concrete and commentary. ACI 318M-14. Farmington Hills, MI: ACI.
Aprile, A., E. Spacone, and S. Limkatanyu. 2001. “Role of bond in RC beams strengthened with steel and FRP plates.” J. Struct. Eng. 127 (12): 1445–1452. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:12(1445).
Arslan, G., F. Sevuk, and I. Ekiz. 2008. “Steel plate contribution to load-carrying capacity of retrofitted RC beams.” Constr. Build. Mater. 22 (3): 143–153. https://doi.org/10.1016/j.conbuildmat.2006.10.009.
Bai, Y., J.-G. Nie, and C. S. Cai. 2008. “New connection system for confined concrete columns and beams. II: Theoretical modeling.” J. Struct. Eng. 134 (12): 1800–1809. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:12(1800).
Barnes, R. A., and G. C. Mays. 2006a. “Strengthening of reinforced concrete beams in shear by the use of externally bonded steel plates: Part 1–Experimental programme.” Constr. Build. Mater. 20 (6): 396–402. https://doi.org/10.1016/j.conbuildmat.2005.01.034.
Barnes, R. A., and G. C. Mays. 2006b. “Strengthening of reinforced concrete beams in shear by the use of externally bonded steel plates: Part 2—Design guidelines.” Constr. Build. Mater. 20 (6): 403–411. https://doi.org/10.1016/j.conbuildmat.2005.01.028.
Carol, I., P. C. Prat, and C. M. López. 1997. “Normal/shear cracking model: Application to discrete crack analysis.” J. Eng. Mech. 123 (8): 765–773. https://doi.org/10.1061/(ASCE)0733-9399(1997)123:8(765).
CEB-FIP (Comité Euro-International du Béton-Fédération International de la Précontrainte). 2010. Model code 2010. Bulletin 65. Lausanne, Switzerland: Institution of Structural Engineering (fib).
Chen, J. F., and J. G. Teng. 2001. “Anchorage strength models for FRP and steel plates bonded to concrete.” J. Struct. Eng. 127 (7): 784–791. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:7(784).
Chen, Z. Y., J. Q. Zhu, and P. G. Wu. 1992. High strength concrete and its application, 21–31. [In Chinese.] Beijing: Tsinghua University Press.
CMC (China Ministry of Construction). 2010. Code for design of concrete structures. [In Chinese.] Beijing: CMC.
Cook, R. A., and J. L. Burtz. 2003. Design guidelines and specifications for engineered grouts. Rep. No. BC354 RPWO #48. Tallahassee, FL: Florida Department of Transportation.
Ding, F.-X., D.-R. Lu, Y. Bai, Y.-Z. Gong, Z.-W. Yu, M. Ni, and W. Li. 2018. “Behaviour of CFRP-confined concrete-filled circular steel tube stub columns under axial loading.” Thin Walled Struct. 125: 107–118. https://doi.org/10.1016/j.tws.2018.01.015.
Eligehausen, R., and T. Balogh. 1995. “Behavior of fasteners loaded in tension in cracked reinforced concrete.” ACI Struct. J. 92 (3): 365–379. https://doi.org/10.14359/1137.
Eligehausen, R., R. A. Cook, and J. Appl. 2006. “Behavior and design of adhesive bonded anchors.” ACI Struct. J. 103 (6): 822–832. https://doi.org/10.14359/18234.
Feng, P., S. Cheng, Y. Bai, and L. Ye. 2015. “Mechanical behavior of concrete-filled square steel tube with FRP-confined concrete core subjected to axial compression.” Compos. Struct. 123: 312–324. https://doi.org/10.1016/j.compstruct.2014.12.053.
Fuchs, W., R. Eligehausen, and J. E. Breen. 1995. “Concrete capacity design (CCD) approach for fastening to concrete.” ACI Struct. J. 92 (1): 73–94. https://doi.org/10.14359/1533.
Geubelle, P. H., and J. S. Baylor. 1998. “Impact-induced delamination of composites: A 2D simulation.” Composites Part B 29 (5): 589–602. https://doi.org/10.1016/S1359-8368(98)00013-4.
Guo, Z. 2014. Principles of reinforced concrete. Oxford, UK: Butterworth-Heinemann.
Han, L.-H., and W. Li. 2010. “Seismic performance of CFST column to steel beam joint with RC slab: Experiments.” J. Constr. Steel Res. 66 (11): 1374–1386. https://doi.org/10.1016/j.jcsr.2010.05.003.
Kani, G. N. J. 1966. “Basic facts concerning shear failure.” ACI J. Proc. 63 (6): 675–692. https://doi.org/10.14359/7644.
Li, Y. Y., B. Guo, and J. Liu. 2014. “Research on reinforced concrete beam enlarged cross section method experiment and finite element simulation.” Appl. Mech. Mater. 638–640: 208–213. https://doi.org/10.4028/www.scientific.net/AMM.638-640.208.
Liu, X.-G., J.-S. Fan, Y. Bai, M.-X. Tao, and J.-G. Nie. 2015. “Stress increment of unbonded prestressing tendons in prestressed concrete girders with corrugated steel webs.” J. Bridge Eng. 20 (7): 04014094. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000694.
Maekawa, K., H. Okamura, and A. Pimanmas. 2003. Non-linear mechanics of reinforced concrete. Boca Raton, FL: CRC.
Miyamoto, A., K. Tei, H. Nakamura, and J. W. Bull. 2000. “Behavior of prestressed beam strengthened with external tendons.” J. Struct. Eng. 126 (9): 1033–1044. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:9(1033).
Nie, J.-G., Y. Bai, and C. S. Cai. 2008. “New connection system for confined concrete columns and beams. I: Experimental study.” J. Struct. Eng. 134 (12): 1787–1799. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:12(1787).
Nie, J.-G., and J. Zhao. 2008. “Experimental study on simply supported RC beams strengthened by steel plate-concrete composite technique.” [In Chinese.] J. Build. Struct. 29 (5): 50–56.
Raoof, M., J. A. El-Rimawi, and M. A. H. Hassanen. 2000. “Theoretical and experimental study on externally plated R.C. beams.” Eng. Struct. 22 (1): 85–101. https://doi.org/10.1016/S0141-0296(98)00056-X.
Rots, J. G. 1991. “Smeared and discrete representations of localized fracture.” Int. J. Fract. 51 (1): 45–59. https://doi.org/10.1007/BF00020852.
Sakai, J., and K. Kawashima. 2006. “Unloading and reloading stress–strain model for confined concrete.” J. Struct. Eng. 132 (1): 112–122. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:1(112).
Shi, G., Z. Liu, Y. Bai, Y. Shi, and Y. Wang. 2012. “In-plane bending of laminated glass fin strengthened through external bonding.” Adv. Struct. Eng. 15 (1): 55–64. https://doi.org/10.1260/1369-4332.15.1.55.
Tao, M.-X., and J.-G. Nie. 2015. “Element mesh, section discretization and material hysteretic laws for fiber beam–column elements of composite structural members.” Mater. Struct. 48 (8): 2521–2544. https://doi.org/10.1617/s11527-014-0335-2.
Tao, M.-X., and J.-G. Nie. 2016. “Multi-scale modeling for deformation mechanism analysis of composite joint substructures.” Eng. Struct. 118: 55–73. https://doi.org/10.1016/j.engstruct.2016.03.047.
Wu, Z., T. Matsuzaki, K. Yokoyama, and T. Kanda. 1999. “Retrofitting method for reinforced concrete structures with externally prestressed carbon fiber sheets.” ACI Spec. Publ. 188: 751–766.
Zamora, N. A., R. A. Cook, R. C. Konz, and G. R. Consolazio. 2003. “Behavior and design of single, headed and unheaded, grouted anchors under tensile load.” ACI Struct. J. 100 (2): 222–230. https://doi.org/10.14359/12486.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 11 • November 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Feb 2, 2018
Accepted: May 31, 2018
Published online: Sep 13, 2018
Published in print: Nov 1, 2018
Discussion open until: Feb 13, 2019
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