Khatami, Seyed Mohammad, Naderpour, Hosein, Zand Moghdam, Mohammad Reza, Mousavi Delaziani, Hosein, Mddah, Mohsen. (1404). An Innovative Model to Determine Damping Ratio based on an Experimental Test during Collision. هنرهای کاربردی, 13(3), 69-85. doi: 10.22075/jrce.2024.34021.2090
Seyed Mohammad Khatami; Hosein Naderpour; Mohammad Reza Zand Moghdam; Hosein Mousavi Delaziani; Mohsen Mddah. "An Innovative Model to Determine Damping Ratio based on an Experimental Test during Collision". هنرهای کاربردی, 13, 3, 1404, 69-85. doi: 10.22075/jrce.2024.34021.2090
Khatami, Seyed Mohammad, Naderpour, Hosein, Zand Moghdam, Mohammad Reza, Mousavi Delaziani, Hosein, Mddah, Mohsen. (1404). 'An Innovative Model to Determine Damping Ratio based on an Experimental Test during Collision', هنرهای کاربردی, 13(3), pp. 69-85. doi: 10.22075/jrce.2024.34021.2090
Khatami, Seyed Mohammad, Naderpour, Hosein, Zand Moghdam, Mohammad Reza, Mousavi Delaziani, Hosein, Mddah, Mohsen. An Innovative Model to Determine Damping Ratio based on an Experimental Test during Collision. هنرهای کاربردی, 1404; 13(3): 69-85. doi: 10.22075/jrce.2024.34021.2090

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، پاییز 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
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
  • Pounding phenomena is accorded when two adjacent structures are built close to each other without sufficient separation distance.
  • In order to calculate impact force, a special parameter is numerically considered, which is called damping ratio and is determined by using stiffness, velocity and masses.
  • Comparison of experimental results and numerical analysis is able to confirm the accuracy of suggested formula in order to calculate the value of damping ratio.
  • Basically, dissipated energy and absorb energy by experimental test and numerical analysis are collected to compare and confirm the equations.
کلیدواژه‌ها
Damping ratio؛ Impact force؛ Energy dissipation؛ Impact velocity؛ Experimental test
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