Study of the Impact of Pounding of Steel Moment Frames due to Sequential near- and far-fault Earthquakes

Document Type : Research Article

Authors

1 Department of Civil Engineering, Institute for Higher Education ACECR, Khouzestan, Iran

2 Department of Civil Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran

3 Department of Civil Engineering, Institute for higher education ACECR, Khouzestan, Iran

Abstract

Seismic codes, the pioneers in presenting seismic criteria in the nonlinear behavior of structures, usually address less the two main factors. The first accident hits adjacent structures, which can be a severe nonlinear cause, and regulations are usually used to execute the program on adjacent structures, a discontinuous seam between two adjacent structures, but if necessary, the effect of adjacent buildings with discontinuous joints is recommended. Or, no suggestion is made and second, the sequence is executed. In this paper, in order to investigate the impact of adjacent steel bending structures due to successive earthquakes near and near the fault, six pairs of steel frames with different heights, with and without height differences on the ground floor have been used. These frames have been evaluated using nonlinear time history analysis under the effect of 24 consecutive earthquakes in the near and far faults in the form of three sequential seismic composition scales that have been scaled according to the fourth edition of the 2800 standard. The results of the study showed that the seam of the regulation did not prevent adjacent frames from colliding with each other and needed to be reviewed, but compared to the frames in contact, which in most cases led to the collapse of the frame, it is more suitable and reduces damage. . Impact force changes the behavior of adjacent colliding frames relative to the expected behaviors of the frames without impact (separate frames) and exhibits different responses.

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References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 9
December 2022
Pages 3471-3496

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