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An Innovative Model to Determine Damping Ratio based on an Experimental Test during Collision | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 17، دوره 13، شماره 3 - شماره پیاپی 39، آبان 2025، صفحه 69-85 اصل مقاله (536.08 K) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2024.34021.2090 | ||
| نویسندگان | ||
| Seyed Mohammad Khatami* 1؛ Hosein Naderpour2؛ Mohammad Reza Zand Moghdam3؛ Hosein Mousavi Delaziani4؛ Mohsen Mddah5 | ||
| 1Ph.D, University of Applied Science and Technology, Center of Semnan Municipality, Semnan, Iran | ||
| 2Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran | ||
| 3Associate Professor, Semnan Branch, Islamic Azad University, Semnan, Iran | ||
| 4Ph.D Student, Semnan Branch, Islamic Azad University, Semnan, Iran | ||
| 5M.Sc., Semnan Municipality, Semnan, Iran | ||
| تاریخ دریافت: 28 اردیبهشت 1403، تاریخ بازنگری: 30 تیر 1403، تاریخ پذیرش: 17 آبان 1403 | ||
| چکیده | ||
| This study investigates the damping ratio to evaluate impact force and energy absorption during collisions between adjacent buildings under seismic excitation. Experimental tests using different balls and varying heights were conducted to calculate impact velocity. The case of pounding is carried experimentally out and numerically studied based on an experimental test by using different balls and various heights in order to fall and calculate impact velocity. For this challenge, special element is numerically considered which is included to have spring and dashpot. The stiffness of spring and damping ratio of dashpot needs to be accurately calculated for determining impact value and dissipated energy. The cogency of calculation the value of damping ratio is investigated by defining an impact that is basically described and mathematically simulated with a nonlinear viscoelastic model. Using energy role, energy absorption is calculated, and energy dissipation is estimated. Finally, a new equation of motion in field of damping ratio is approximately suggested, and the accuracy of the formula is numerically confirmed and also compared with the results of experimental analyses. For instance, the results of comparison show a 6% error between numerical study and experimental test. In order to investigate the results of evaluation and compare with other equations and experimental test, another study is generally carried out, which describes same peak impact force about 1192 kN in all various results. Finally, different situations by using various parameters are considered to describe the effect of suggested equation. | ||
تازه های تحقیق | ||
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| کلیدواژهها | ||
| Damping ratio؛ Impact force؛ Energy dissipation؛ Impact velocity؛ Experimental test | ||
| مراجع | ||
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[14] Naderpour H, De Menezes E, Manuel R, Khatami SM. A new model for calculating the impact force and the energy dissipation based on CR-factor and impact velocity. Sci Iran 2015;22:59–68.
[15] Naderpour H, Barros RC, Khatami SM, Jankowski R. Numerical Study on Pounding between Two Adjacent Buildings under Earthquake Excitation. Shock Vib 2016;2016:1–9. https://doi.org/10.1155/2016/1504783.
[16] Naderpour H, Barros RC, Khatami SM. Suggestion of an equation of motion to calculate the damping ratio during earthquake based on a cyclic procedure. J Theor Appl Mech 2016:963. https://doi.org/10.15632/jtam-pl.54.3.963.
[17] Naderpour H, Khatami SM, Barros RC. Prediction of Critical Distance Between Two MDOF Systems Subjected to Seismic Excitation in Terms of Artificial Neural Networks. Period Polytech Civ Eng 2017. https://doi.org/10.3311/PPci.9618.
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[22] Rabiee R, Chae Y. Adaptive base isolation system to achieve structural resiliency under both short- and long-period earthquake ground motions. J Intell Mater Syst Struct 2019;30:16–31. https://doi.org/10.1177/1045389X18806403.
[23] Akbulut M, Sarac A, Ertas AH. An investigation of non-linear optimization methods on composite structures under vibration and buckling loads. Adv Comput Des 2020;5:209–31.
[24] Khatami SM, Naderpour H, Mortezaei A, Maddah M, Lasowicz N, Jankowski R. Optimum shapes and dimensions of rubber bumpers in order to reduce structural pounding during seismic excitations. Structures 2023;48:1046–56. https://doi.org/10.1016/j.istruc.2023.01.026.
[25] Khatami SM, Matos JC, Naderpour H, Mortezaei A, Maddah M. Enhancing Pounding Hazard Assessment: Investigating Rubber Bumper Behavior in Base Isolation Systems during Earthquakes. Pract Period Struct Des Constr 2024;29. https://doi.org/10.1061/PPSCFX.SCENG-1379.
[26] Khatami SM, Naderpour H, Mortezaei A, Sharbatdar A, Lasowicz N, Jankowski R. The Effectiveness of Rubber Bumpers in Reducing the Effects of Earthquake-Induced Pounding between Base-Isolated Buildings. Appl Sci 2022;12:4971. https://doi.org/10.3390/app12104971.
[27] Khatami SM, Naderpour H, Mortezaei AR, Barros RC, Maddah M. The effect of rubber bumper in order to suggest a new equation to calculate damping ratio, subjected building pounding during seismic excitation. Earthquakes Struct 2022;23:129. | ||
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