Behavior of Smart Reinforced Concrete Beam Column Joints by Using Shape Memory Alloy Reinforcement Under Repeated Loading

Maha  Qassim Hameed; Ali  Laftah Abbass

doi:10.24237/djes.2022.15312

Authors

Maha Qassim Hameed
marrymariam005@gmail.com
Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Ali Laftah Abbass Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq

Keywords:

SMA,, Smart connection,, Earthquake repeated load,, Reinforced concrete Joint,

Abstract

Using the super elastic materials in structures design is becoming very important in the research field because of their rare ability in sensing the around effect and reacting against the mechanical and thermal react. The major intent in this research is designing smart concrete beam column joints reinforced by Shape Memory Alloy (SMA) bars. The suggested systems use the (super elastic) Pseudo Elastic (PE) react of the SMA as reinforcement after being subjected under monotonic and repeated load. The behaviors of systems were explored experimentally and by using finite element simulation. In order to estimate load-displacement relationships of these specimens in this study, Analytical models were developed. A comparison of the reinforced specimens by SMA was carried out and it contained that the variation in percentage of the SMA in flexural reinforcement (25%, 50%, 75%) of the total flexural reinforcement by using this substitution get a clear effect on the failure load and the ultimate displacement of the specimens with these different ratios. The Finite Element models were developed by using the software ABAQUS. The models have been checked with the experimental results in the load-displacement terms in the top reinforcement. The models showed reasonable response. Where the ultimate load decreased by using SMA bars in (25%, 50%, 75% ) percentage of total flexural reinforcement about (50.51%, 28.32%, 38.15%) respectively, in case of static loading and (20.7%, 10.7%, 9.3%) respectively in case of repeated loading, and the deflection is increasing by using SMA in (25%, 50%, 75% ) percentage of total flexural reinforcement about (1.2%, 8.4%, 0.36%) respectively, in case of static loading and (9.6%, 5.28%, 10.9%) respectively in case of repeated loading

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References

T. Paulay and M. N. Priestley, Seismic design of reinforced concrete and masonry buildings. 1992. DOI: https://doi.org/10.1002/9780470172841

P. K. Kumar and D. C. Lagoudas, “Introduction to shape memory alloys,” in Shape Memory Alloys, Boston, MA: Springer US, 2008.

Charles Walter Beckingsale, August, 1980, '' Post Elastic Behavior of Reinforced Concrete Beam-Column Joints''.

M. A. Youssef, M. S. Alam, and M. Nehdi, “Experimental investigation on the seismic behavior of beam-column joints reinforced with superelastic shape memory alloys,” J. Earthq. Eng., vol. 12, no. 7, pp. 1205–1222, 2008. DOI: https://doi.org/10.1080/13632460802003082

C. Fang, M. C. H. Yam, A. C. C. Lam, and L. Xie, “Cyclic performance of extended end-plate connections equipped with shape memory alloy bolts,” J. Constr. Steel Res., vol. 94, pp. 122–136, 2014. DOI: https://doi.org/10.1016/j.jcsr.2013.11.008

J. W. Hu, Seismic performance evaluations and analyses for composite moment frames with smart SMA PR-CFT connections. 2008.

P. R. Witting and F. A. Cozzarelli, Shape memory structural dampers: Material properties, design and seismic testing. Buffalo, NY, USA, 1992.

H. Jeelan and L. Ali, Abbass 2019 Beam Column Connection in Smart Structures subjected to Dynamic load; Msc thesis.

G. Song, Y. L. Mo, K. Otero, and H. Gu, “Health monitoring and rehabilitation of a concrete structure using intelligent materials,” Smart Mater. Struct., vol. 15, no. 2, pp. 309–314, 2006.

E. Choi, T.-H. Nam, S.-C. Cho, Y.-S. Chung, and T. Park, “The behaviour of concrete cylinders confined by shape memory alloy wires,” Smart Materials and Structures, vol. 17, no. 6, 2008. DOI: https://doi.org/10.1088/0964-1726/17/6/065032

S. M. Orvis, Prestressing concrete with shape memory alloy fibres. San Luis Obispo, CA, USA, 2009.

G. Song, Y. L. Mo, K. Otero, and H. Gu, “Health monitoring and rehabilitation of a concrete structure using intelligent materials,” Smart Mater. Struct., vol. 15, no. 2, pp. 309–314, 2006. DOI: https://doi.org/10.1088/0964-1726/15/2/010