مهندسی سازه و ساخت

مهندسی سازه و ساخت

بررسی تحلیلی عملکرد لرزه ای اتصال در سیستم های دال پس کشیده به همراه تیر عریض

نوع مقاله : علمی - پژوهشی

نویسندگان
1 مهندس، دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود، شاهرود، ایران
2 دانشیار، دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود، شاهرود، ایران
چکیده
با توجه به افزایش استفاده از دال‌های پس‌کشیده در سازه‌های با دهانه‌های بلند، مطالعه رفتار لرزه‌ای این سیستم‌ها اهمیت بیشتری یافته است. در این مقاله از دال پس‌کشیده در کنار سیستم‌های قاب خمشی با تیر عریض استفاده شده است. به این منظور ابتدا یک نمونه اتصال کناری دال پس‌کشیده به ستون و تیر عریض به ستون در نرم افزار آباکوس مورد صحت سنجی قرار گرفت. سپس با افزودن تیر عریض با ابعاد مختلف به نمونه دال پس‌کشیده و همچنین افزودن دال پس‌کشیده به نمونه تیر عریض، عملکرد این سیستم مورد بررسی قرار گرفت. نتایج نشان داد حضور تیر عریض مدفون در دال باعث افزایش 5/21 درصدی مقاومت نهایی و تیر عریض با عمق 20 و عرض 60 و 75 سانتی‌متر به ترتیب باعث افزایش 5/171 و 207 درصدی مقاومت نهایی نسبت به نمونه اصلی می‌شود. همچنین سختی موثر نمونه‌های همراه با تیر عریض به طور قابل توجهی افزایش می یابد. تایج نشان داد حضور تیر عریض مدفون در دال باعث افزایش 5/21 درصدی مقاومت نهایی و تیر عریض با عمق 20 و عرض 60 و 75 سانتی‌متر به ترتیب باعث افزایش 5/171 و 207 درصدی مقاومت نهایی نسبت به نمونه اصلی می‌شود. همچنین سختی موثر نمونه‌های همراه با تیر عریض به طور قابل توجهی افزایش می یابد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Analytical Evaluation of Seismic Performance of Post-tensioned slab with RC Wide Beam

نویسندگان English

Amin Behrouz 1
Jalil Shafaei 2
1 Engineer, Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
2 Associate Professor, Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
چکیده English

Due to the increase in the use of post-tension slabs in structures with long spans, studying and investigating the seismic behavior of these types of systems has become more important. In this article, post-tension slab systems are used along with wide beam moment frame systems. For this purpose, firstly, a sample of the exterior connection of the post-tension slab to the column and a sample of the exterior connection of the wide beam to the column were validated in ABAQUS software. Then, by adding a wide beam with different dimensions to the post-tension slab sample and also adding a post-tension slab to the validated wide beam sample, the performance of this combined system was investigated. The results showed that the presence of the wide beam buried in the slab increases the ultimate strength by 21.5% and the wide beam with a depth of 20 cm and a width of 60 and 75 cm respectively increases the ultimate strength by 171.5 and 207% compared to the original sample. Also, the effective stiffness of the samples with the wide beam increases significantly. The results showed that the presence of the wide beam buried in the slab increases the ultimate strength by 21.5% and the wide beam with a depth of 20 cm and a width of 60 and 75 cm respectively increases the ultimate strength by 171.5 and 207% compared to the original sample. Also, the effective stiffness of the samples with the wide beam increases significantly.

کلیدواژه‌ها English

Prestressed Slab
post-tensioned Slab
Lateral Loading
Reinforced Concrete Slab
Reinforced Concrete
[1] Aalami, B., 1994. Unbonded and Bonded Post-Tensioning Systems in Building Construction: A Design and Performance Review.: Post-Tensioning Institute.
[2] Trongtham, N. and N.M. Hawkins,1977. Moment transfer to columns in unbonded post-tensioned prestressed concrete slabs.: Department of Civil Engineering, University of Washington.
[3] Sunidja, H., D.A. Foutch, and W. Gamble, 1982., Response of prestressed concrete plate-edge column connections. Engineering, Materials Science
[4] Martinez-Cruzado, J.A., 1993. Experimental study of post-tensioned flat plate exterior slab-column connections subjected to gravity and biaxial loading., University of California, Berkeley.
[5] Warnitchai, P., 2004. Seismic performance of post–tensioned interior flat slab–column connections. in Proceedings of Third International Symposium on New Technologies for Urban Safety of Mega Cities in Asia.. Citeseer.
[6] Han, S.W., 2006., Hysteretic behavior of exterior post-tensioned flat plate connections. Engineering Structures, 28(14): p. 1983-1996.
[7] Kang, T. and Y. Huang, 2012. Nonlinear finite element analyses of unbonded post-tensioned slab-column connections. PTI Journal, 8(1): p. 4-19.
[8] Janghorban, F., A. Hoseini, and W.L. Gamble, 2020.  Effects of Tendon Arrangements on Two-Way Unbonded Post-Tensioned Slab-Edge Column Connections. ACI Structural Journal, 117(2): p. 33-44.
[9] Behrouz, A., & Shafaei, J. 2023. Parametric study of the behavior of exterior post tensioned slab column connections under lateral loading.Concrete research Quarterly Journal  c، 15(4), 21–32
[10] Nezami,S. A.,Shafaei,J. (2024). Analytical Modeling of Rehabilitated Beam-Column Connections with Non-Seismic Details Using Joint Enlargement and Post-Tensioned. Journal of Civil and Environmental Engineering University of Tabriz .Volume 54 (2025), Issue 4, 37-53
[11]Popov, E.P., 1992., Behavior of interior narrow and wide beams. Structural Journal, 89(6): p. 607-616.
[12] Gentry, T.R. and J.K. Wight, 1994. Wide beam-column connections under earthquake-type loading. Earthquake Spectra, 10(4): p. 675-703.
[13] LaFave, J.M., 1997. Behavior of reinforced concrete exterior wide beam-column-slab connections subjected to lateral earthquake loading.: University of Michigan.
[14] Li, B. and S.A. Kulkarni, 2010. Seismic behavior of reinforced concrete exterior wide beam-column joints. Journal of structural engineering, 136(1): p. 26-36.
[15] Fadwa, I., 2014., Reinforced concrete wide and conventional beam–column connections subjected to lateral load. Engineering Structures, 76: p. 34-48.
[16] Luk, S. and J.S. Kuang, 2017. Seismic performance and force transfer of wide beam–column joints in concrete buildings. Proceedings of the Institution of Civil Engineers-Engineering and Computational Mechanics, 170(2): p. 71-88.
[17] Behnam, H., J. Kuang, and B. Samali, 2018. Parametric finite element analysis of RC wide beam-column connections. Computers & Structures, 201:205.8p. 28-44.
[18] Pakzad, A. and M. Khanmohammadi, 2020. Experimental cyclic behavior of code-conforming exterior wide beam-column connections. Engineering Structures, 214: p. 110613.
[19] Kmiecik, P. and M. Kamiński, 2011. Modelling of reinforced concrete structures and composite structures with concrete strength degradation taken into consideration. Archives of civil and mechanical engineering, 11(3): p. 623-636
[20] Thorenfeldt, E., 1987. Mechanical properties of high-strength concrete and applications in design. in Symposium Proceedings, Utilization of High-Strength Concrete, Norway.
[21] Wang, T. and T.T. Hsu, 2001.  Nonlinear finite element analysis of concrete structures using new constitutive models. Computers & structures, 79(32):p. 2781-2791.
[22] Devalapura, R.K. and M.K. Tadros, 1992. Stress-strain modeling of 270 ksi low-relaxation prestressing strands. PCI Journal,. 37(2): p. 100-106.
[23] Huang, Y. 2012, Finite element method for post-tensioned prestressed concrete structures.: The University of Oklahoma.
[24] Pan, A. and J.P. Moehle, 1989. Lateral displacement ductility of reinforced concrete flat plates. Structural Journal, 86(3): p. 250-258.
[25] Paulay, T. and M.N. Priestley, 1992. Seismic design of reinforced concrete and masonry buildings.

  • تاریخ دریافت 18 مرداد 1404
  • تاریخ بازنگری 25 شهریور 1404
  • تاریخ پذیرش 18 مهر 1404