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Effects of mechanical coupler on cyclic behavior of wet connection in precast concrete Frame | ||
| AUT Journal of Civil Engineering | ||
| مقاله 1، دوره 4، شماره 1، خرداد 2020، صفحه 3-16 اصل مقاله (1.86 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2019.15680.5547 | ||
| نویسندگان | ||
| Ehsan Mobedi1؛ Hossein Parastesh* 1؛ alireza khaloo2 | ||
| 1Department of Civil Engineering, University of Science and Culture, Tehran, Iran | ||
| 2Civil engineering, Sharif University of Technology | ||
| چکیده | ||
| Too many efforts have been made to study the structural behavior of precast concrete moment-resisting connections subjected to seismic excitations. Mechanical reinforcement couplers (MRCs) are one of the main solutions for enhancing the ductility and energy absorption in the precast connection zone. The main novelty of this research is to propose an efficient precast connection using MRCs and grout. The current paper is attempted to explore the effects of the MRCs on the precast concrete connection cyclic load protocols. MRC connection is comprised of an innovative detailing for joining the reinforcement bars using couplers and the cast-in-place concrete was used to construct the connection zone. Several test specimens with various couplers array were prepared to a comprehensive survey on the seismic behavior of the connection zone. The displacement control procedure of the test program was simulated in the ABAQUS software. The numerical and experimental results are analyzed to evaluate the moment carrying capacity, energy dissipation, and ductility variations. The differences of failure modes of the monolithic and new precast connection were investigated by detection of the crack propagation procedure through the test monitoring and simulation visualization. The test results of the MRC-equipped specimens were compared with those of numerical models. Both numerical simulation and test program leads to same results which demonstrated that the moment carrying capacity and energy dissipation are significantly improved. The crack propagation pattern in the monolithic sample was different from the precast specimens | ||
| کلیدواژه‌ها | ||
| Precast concrete؛ Mechanical Splice Coupler؛ Semi-dry connection؛ Cast in Place Concrete؛ Seismic behavior | ||
| مراجع | ||
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[1] A.-A.C. 550, Guide to Emulating Cast-in-place Detailing for Seismic Design of Precast Concrete Structures, in, American Concrete Institute, 2009.
[2] M.N. Priestley, Overview of PRESSS research program, PCI journal, 36(4) (1991) 50-57.
[3] D. Bull, Guidelines for the use of structural precast concrete in buildings, Centre for Advanced Engineering, University of Canterbury, 2000.
[4] Y. Masuda, M. Iizuka, Revision of “JASS 10 Precast Reinforced Concrete Work”, Concrete Journal, 51(4) (2013).
[5] R. Vidjeapriya, K. Jaya, Experimental study on two simple mechanical precast beam-column connections under reverse cyclic loading, Journal of Performance of Constructed Facilities, 27(4) (2013) 402-414.
[6] D. Ejima, Seismic experimental study on a precast concrete beamcolumn connection with grout sleeves, Engineering Structures, 155 (2018) 330-344.
[7] T. Ozturan, S. Ozden, O. Ertas, Ductile connections in precast concrete moment resisting frames, concrete construction, 9 (2006) 11.
[8] H. Parastesh, I. Hajirasouliha, R. Ramezani, A new ductile momentresisting connection for precast concrete frames in seismic regions: an experimental investigation, Engineering Structures, 70 (2014) 144-157.
[9] C.-x. Wu, Y. Zhou, W.-s. Lai, Y.-f. Zhang, X.-s. Deng, Experiment on seismic performance of cast-in-situ and prefabricated concrete frame structure joints, J. Archit. Civil. Eng, 32(3) (2015) 60-66.
[10] A. Bai, J. Ingham, R. Hunt, Assessing the seismic performance of reinforcement coupler systems, University of Auckland, 2003
[11] Z.B. Haber, Precast column-footing connections for accelerated bridge construction in seismic zones, University of Nevada, Reno, 2013.
[12] D. Bompa, A. Elghazouli, Inelastic cyclic behaviour of RC members incorporating threaded reinforcement couplers, Engineering Structures, 180 (2019) 468-483.
[13] S. Bahrami, M. Madhkhan, F. Shirmohammadi, N. Nazemi, Behavior of two new moment resisting precast beam to column connections subjected to lateral loading, Engineering Structures, 132 (2017) 808-821.
[14] M. Fathi, M. Parvizi, J. Karimi, M.H. Afreidoun, Experimental and numerical study of a proposed moment-resisting connection for precast concrete frames, Scientia Iranica, 25(4) (2018) 1977-1986.
[15] I.C. Council, B. Officials, C.A. International, I.C.o.B. Officials, S.B.C.C. International, International building code 2009, Cengage Learning, 2009.
[16] ASCE, Minimum design loads for buildings and other structures, in, American Society of Civil Engineers, 2013.
[17] Committee, Building code requirements for structural concrete (ACI 318-05) and commentary (ACI 318R-05), in, American Concrete
Institute, 2005.
[18] D. Systèmes, ABAQUS/Analysis User’s Guide, Version 2016, Waltham, Massachusetts: Dassault, (2016).
[19] J.B. Mander, M.J. Priestley, R. Park, Theoretical stress-strain model for confined concrete, Journal of structural engineering, 114(8) (1988) 1804-1826.
[20] M. Sargin, Stress-Strain relationships for concrete and analysis of structural concrete sections, Study No. 4, Solid Mechanics Division, University of Waterloo, Waterloo, Ontario, Canada, (1971).
[21] ASCE, Seismic evaluation and retrofit of existing buildings, in, American Society of Civil Engineers, 2014.
[22] M.A. Ab-Kadir, J. Zhang, N. Mashros, A. Hassan, N. Mohd, Experimental and Numerical Study on Softening and Pinching Effects of Reinforced Concrete Frame, IOSR Journal of Engineering, 4(1) (2014). | ||
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