پیوندهای مفید
آمار
| تعداد نشریات | 22 |
| تعداد شمارهها | 705 |
| تعداد مقالات | 10,146 |
| تعداد مشاهده مقاله | 71,449,175 |
| تعداد دریافت فایل اصل مقاله | 63,173,549 |
A New Relationship for Determining the Impact Force between Two Adjacent Structures Considering Building Pounding | ||
| Journal of Rehabilitation in Civil Engineering | ||
| دوره 10، شماره 1 - شماره پیاپی 25، اردیبهشت 2022، صفحه 141-155 اصل مقاله (762.29 K) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2022.22918.1493 | ||
| نویسندگان | ||
| Yaghub Ebrahimi1؛ Alireza Mortezaei* 2؛ Ali Hemmati3؛ Mahmoud Nikkhah Shahmirzadi3 | ||
| 1Ph.D. Candidate, Civil Engineering Department, Semnan Branch, Islamic Azad University, Semnan, Iran | ||
| 2Associate Professor, Seismic Geotechnical and High Performance Concrete Research Centre, Civil Engineering Department, Semnan Branch, Islamic Azad University, Semnan, Iran | ||
| 3Assistant Professor, Seismic Geotechnical and High Performance Concrete Research Centre, Civil Engineering Department, Semnan Branch, Islamic Azad University, Semnan, Iran | ||
| تاریخ دریافت: 25 اسفند 1399، تاریخ بازنگری: 11 دی 1400، تاریخ پذیرش: 11 دی 1400 | ||
| چکیده | ||
| Insufficient separation distance between two adjacent buildings can cause to collision when large lateral displacements are accrued due to seismic excitation. The impact force between structures induces many serious damages, which is called building pounding. In this study, pounding between two dynamic models is investigated and the impact force is numerically calculated. The impact is simulated based on special elements, including spring and dashpot, and the impact force and dissipated energy during the impact are determined. Both mentioned parameters depend significantly on the impact velocity, spring stiffness and the value of damping. For this purpose, the impact velocity of collision is parametrically measured and subsequently, coefficient of restitution is automatically determined. Furthermore, the impact damping ratio and nonlinear stiffness of spring are calculated to evaluate the impact between models. Finally, a new equation is presented to determine the value of damping and the accuracy of formula is confirmed, which is verified by three various approaches. In the first stage, an experimental test is considered and the peak impact force is extracted when a concrete ball is dropped on a rigid concrete surface. On the other hand, a numerical simulation is similarly assumed and the suggested formula is used to determine the peak impact force during collision. Then, the results of the peak impact forces between experimentally and numerically analyses are compared, which shows both are close to each other. Secondly, an estimated impact between two bodies has been studied. The results of the analysis are also compared between the dissipated and kinetic energies during impact. The comparisons indicate relatively low errors between the calculated and assumed values of the coefficient of restitution when the proposed equation is used. Finally, a value of the coefficient of restitution is selected and an impact is simulated to show hysteresis loop. The enclosed area of each loop is calculated as the dissipated energy and compared with the energy absorption. The above three comparisons show that the proposed formula is very effective and the accuracy of the impact force, calculated by the suggested formula as a parameter of the impact force model, is also acceptable. | ||
| کلیدواژهها | ||
| Pounding؛ Impact force؛ Coefficient of restitution؛ Spring stiffness؛ Damping ratio | ||
| مراجع | ||
|
[1] Papadrakakis M, Mouzakis HP. Earthquake simulator testing of pounding between adjacent buildings. Earthq Eng Struct Dyn 1995;24:811–34. https://doi.org/10.1002/eqe.4290240604.
[2] Filiatrault A, Wagner P, Cherry S. Analytical prediction of experimental building pounding. Earthq Eng Struct Dyn 1995;24:1131–54. https://doi.org/10.1002/eqe.4290240807.
[3] Papadrakakis M, Mouzakis H, Plevris N, Bitzarakis S. A lagrange multiplier solution method for pounding of buildings during earthquakes. Earthq Eng Struct Dyn 1991;20:981–98. https://doi.org/10.1002/eqe.4290201102.
[4] Shakya K, Wijeyewickrema AC. Mid-Column Pounding of Multi-Story Reinforced Concrete Buildings considering Soil Effects. Adv Struct Eng 2009;12:71–85. https://doi.org/10.1260/136943309787522687.
[5] Kajita Y, Kitahara T, Nishimoto Y, Otsuka H. Estimation of maximum impact force on natural rubber during collision of two steel bars. 1st Eur. Conf. Earthq. Eng. Seismol. (1st ECEES), Geneva, Switzerland, Sept., 2006, p. 3–8.
[6] Jankowski R, Mahmoud S. Linking of adjacent three-storey buildings for mitigation of structural pounding during earthquakes. Bull Earthq Eng 2016;14:3075–97. https://doi.org/10.1007/s10518-016-9946-z.
[7] Masroor A, Mosqueda G. Experimental simulation of base-isolated buildings pounding against moat wall and effects on superstructure response. Earthq Eng Struct Dyn 2012;41:2093–109. https://doi.org/10.1002/eqe.2177.
[8] Jankowski R. Pounding Between Superstructure Segments in Multi-Supported Elevated Bridge with Three-Span Continuous Deck Under 3D Non-Uniform Earthquake Excitation. J Earthq Tsunami 2015;09:1550012. https://doi.org/10.1142/S1793431115500128.
[9] Crozet V, Politopoulos I, Chaudat T. Shake table tests of structures subject to pounding. Earthq Eng Struct Dyn 2019;48:1156–73. https://doi.org/10.1002/eqe.3180.
[10] Anagnostopoulos SA. Pounding of buildings in series during earthquakes. Earthq Eng Struct Dyn 1988;16:443–56. https://doi.org/10.1002/eqe.4290160311.
[11] Anagnostopoulos SA. Equivalent viscous damping for modeling inelastic impacts in earthquake pounding problems. Earthq Eng Struct Dyn 2004;33:897–902. https://doi.org/10.1002/eqe.377.
[12] Miari M, Choong KK, Jankowski R. Seismic pounding between adjacent buildings: Identification of parameters, soil interaction issues and mitigation measures. Soil Dyn Earthq Eng 2019;121:135–50. https://doi.org/10.1016/j.soildyn.2019.02.024.
[13] Jankowski R. Non-linear viscoelastic modelling of earthquake-induced structural pounding. Earthq Eng Struct Dyn 2005;34:595–611. https://doi.org/10.1002/eqe.434.
[14] Komodromos P, Polycarpou PC, Papaloizou L, Phocas MC. Response of seismically isolated buildings considering poundings. Earthq Eng Struct Dyn 2007;36:1605–22. https://doi.org/10.1002/eqe.692.
[15] Komodromos P, Polycarpou P. On the numerical simulation of impact for the investigation of earthquake-induced pounding of building. Tenth Int. Conf. Comput. Struct. Technol. Civil-Comp Press. Stirlingshire, Scotl., 2010.
[16] Ye K, Li L, Zhu H. A note on the Hertz contact model with nonlinear damping for pounding simulation. Earthq Eng Struct Dyn 2009;38:1135–42. https://doi.org/10.1002/eqe.883.
[17] Kun C, Yang Z, Chouw N. Seismic response of skewed bridges including pounding effects. Earthquakes Struct 2018;14:467–76.
[18] Barros RC, Naderpour H, Khatami SM, Mortezaei A. Influence of Seismic Pounding on RC Buildings with and without Base Isolation System Subject to Near-Fault Ground Motions. J Rehabil Civ Eng 2013;1:39–52. https://doi.org/10.22075/jrce.2013.4.
[19] Naderpour H, Barros RC, Khatami SM. A new model for calculating impact force and energy dissipation based on the CR-factor and impact velocity. Sci Iran 2015;22:59–68.
[20] Mahmoud S, Chen X, Jankowski R. Structural Pounding Models with Hertz Spring and Nonlinear Damper. J Appl Sci 2008;8:1850–8. https://doi.org/10.3923/jas.2008.1850.1858.
[21] Mahmoud S, Jankowski R. Modified linear viscoelastic model of earthquake-induced structural pounding. Iran J Sci Technol Trans Civ Eng 2012;35:51–62. https://doi.org/10.22099/ijstc.2012.656.
[22] 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.
[23] 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;61:516–29. https://doi.org/10.3311/PPci.9618.
[24] Khatami SM, Naderpour H, Barros RC, Jakubczyk-Gałczyńska A, Jankowski R. Effective Formula for Impact Damping Ratio for Simulation of Earthquake-induced Structural Pounding. Geosciences 2019;9:347. https://doi.org/10.3390/geosciences9080347.
[25] Xu X, Xu X, Liu W, Zhou D. A New Formula of Impact Stiffness in Linear Viscoelastic Model for Pounding Simulation. Shock Vib 2016;2016:1–7. https://doi.org/10.1155/2016/5861739.
[26] Mortezaei A, Ronagh HR. Effectiveness of modified pushover analysis procedure for the estimation of seismic demands of buildings subjected to near-fault ground motions having fling step. Nat Hazards Earth Syst Sci 2013;13:1579–93. https://doi.org/10.5194/nhess-13-1579-2013.
[27] Mortezaei A. Plastic hinge length of RC columns considering soil-structure interaction. Earthquakes Struct 2013;5:679–702. https://doi.org/10.12989/eas.2013.5.6.679. | ||
|
آمار تعداد مشاهده مقاله: 625 تعداد دریافت فایل اصل مقاله: 492 |
||