Journal of Civil Engineering and Materials Application
Journal of Civil Engineering and Materials Application

Investigating the Pattern of Plastic Hinge Formation in Steel Moment Frames Under Near-Field and Far-Field Earthquakes

https://doi.org/10.22034/jcema.2024.478835.1140
Volume 8, Issue 2
Spring 2024
Pages 123-139
Journal of Civil Engineering and Materials Application

Document Type : Original Article

Authors

Mohammad Saleh Estakhri
Ali Nikkhoo

Department Civil Engineering Department, University of Science and Culture, Tehran, Iran

Abstract
This study, after modeling three types of 3, 5 and 8-story frames with 2, 3 and 4 spans by Sap2000 using two categories of earthquake records of far and near-field for different levels of PGA, the process of forming plastic hinges has been investigated and evaluated by performing nonlinear time history analysis. The obtained results showed that the first plastic hinges were formed in the 3-story frames in the lower stories and in the case of the 5 and 8-story frames in the middle stories. furthermore, the frequency corresponding to the formation of the first collapse prevention (CP) hinge in the case of the 3-story frame with 2, 3, and 4 span is equal to 1.11, 1.31, and 1.22 Hz, in the case of the 5-story frame it is equal to 0.85, 1.03, and 0.94 Hz, and in the case of the 8-story frame it is equal to 0.44, 0.42, and 0.4 Hz, respectively. Other results showed that the behavior of 3-story frames under the effect of far-field records and the behavior of 5 and 8-story frames under the effect of near-field records are in higher dynamic instability conditions. Also, with the increase of spans and the number of floors, the possibility of damage and dynamic instability in the frames has increased. For all frames with different story numbers, by increasing the number of spans from 2 to 4, an increase of 5.88, 22.4 and 38.3% has been obtained respectively in the number of hinges formed in the frame.

Keywords

plastic hinge
moment frame
nonlinear time-history analysis
near-field and far-field record
Subjects
[1] Farrar CR, Worden K. An introduction to structural health monitoring. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2007 Feb 15;365(1851):303-15. [View at Google Scholar]; [View at Publisher].
[2] Bandara RP, Chan TH, Thambiratnam DP. Frequency response function based damage identification using principal component analysis and pattern recognition technique. Engineering Structures. 2014 May 1;66:116-28. [View at Google Scholar]; [View at Publisher].
[3] Ahmadi HR, Allahyari AM, Allahyari HM. Identifying Damages in girders of Bridges Using Square Time-Frequency Distribution and Neural Network. Amirkabir Journal of Civil Engineering. 2022 Nov 22;54(9):3287-312. [View at Google Scholar]; [View at Publisher].
[4] Sadeghian M, Esfandiari A, Fadavie M. Damage detection in structures using finite element model updating based on changes in wavelet transform coefficients of a correlation function. Amirkabir Journal of Civil Engineering. 2023 May 22;55(3):665-80. [View at Google Scholar]; [View at Publisher].
[5] Kourehli SS. Health monitoring of connections in steel frames using wavelet transform. Amirkabir Journal of Civil Engineering. 2020 May 21;52(3):655-72. [View at Google Scholar]; [View at Publisher].
[6] Haseli B, Kheiri O. Seismic Damage Detection in Reinforced Concrete Piers of Kordestan-Mullasadra Bridges (Numerical Study) Using RID Functions and Tensor Method. Civil Infrastructure Researches. 2020 Feb 20;5(2):31-49. [View at Google Scholar]; [View at Publisher].
[6] M. S. Sahib al-Zaman, M. R. Sheydayi and A. Salmasi, “Effects of Plastic Hinge Modelling of Rigid Connections on Progressive Destruction of Steel Moment Frames”, Journal of Structural and Construction Engineering, (2021),  Vol 8, No 1, 327-342. [View at Publisher].
[7] A. Khalili, M. Ahmadi, E. Emami and A. Kheyroddin, (2014), “Prediction of Plastic Hinge Length in Reinforced Concrete Bridge Columns Using Artificial Neural Network Algorithm”, Concrete Research, 8th year, No 1,27-40. [View at Publisher].[8] Huras Ł, Bońkowski P, Nalepka M, Kokot S, Zembaty Z. Numerical analysis of monitoring of plastic hinge formation in frames under seismic excitations. Journal of Measurements in Engineering. 2018 Dec 31;6(4):190-5. [View at Google Scholar]; [View at Publisher].
[9] Sixth Topics of Iranian National Building Codes, Loads Applied to the Buildings, Ministry of Road and Urban Development, Research Center of Road, House and Urban Development, Bureau of National Building Codes (2019).
[10] Standrad No 2800, Iranian Code of Practice for Seismic Resistant Design of Building, 2014, 4th Edition, Tehran, Iran.
  • Receive Date 16 February 2024
  • Revise Date 20 April 2024
  • Accept Date 30 May 2024
Article View 22,635
PDF Download 7,240

Home

Guide for Authors

Submit Manuscript

Reviewers

Contact Us