Imperial College London
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Dr Christian Malaga-Chuquitaype

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5007c.malaga Website CV

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

322Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Málaga-Chuquitaype:2021:10.1002/eqe.3350,
author = {Málaga-Chuquitaype, C},
doi = {10.1002/eqe.3350},
journal = {Earthquake Engineering and Structural Dynamics},
pages = {635--654},
title = {Strong-motion duration and response scaling of yielding and degrading eccentric structures},
url = {http://dx.doi.org/10.1002/eqe.3350},
volume = {50},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Plan irregular structures, whose complex response represents a generalisation of the simpler de-coupled motion ascribed to symmetric buildings, make up a large proportion of the failures during major earthquakes. This paper examines the seismic response scaling of degrading and no-degrading eccentric structures subjected to bidirectional earthquake action and its relationship with the duration of the ground motion by means of dimensional and orientational analyses. Structures with reflectionally symmetric stiffness distribution and mass eccentricity subjected to orthogonal pairs of ideal pulses are considered as the fundamental case. The application of Vaschy–Buckingham's (Formula presented.) -theorem reduces the number of variables governing the peak orthogonal displacements leading to the emergence of remarkable order in the structural response. If orientationally consistent dimensionless parameters are selected, the response becomes self-similar. By contrast, when degradation is introduced, peak inelastic displacements are dramatically affected and the self-similarity in the response is lost immediately after the onset of inelastic deformations. Conversely, if the uniform duration, instead of the period, of the strong motion is adopted as a timescale, a practically self-similar response is observed. This offers unequivocal proof of the fundamental role played by the ground-motion duration in defining the peak displacement response of degrading structures even at small inelastic demands, although its importance increases with increasing deformation levels. Finally, the existence of complete similarities, or similarities of the first kind, are explored and the practical implications of these findings are briefly outlined in the context of real pulse-like ground motions with varying degrees of coherency.
AU  - Málaga-Chuquitaype,C
DO  - 10.1002/eqe.3350
EP  - 654
PY  - 2021///
SN  - 0098-8847
SP  - 635
TI  - Strong-motion duration and response scaling of yielding and degrading eccentric structures
T2  - Earthquake Engineering and Structural Dynamics
UR  - http://dx.doi.org/10.1002/eqe.3350
UR  - http://hdl.handle.net/10044/1/84306
VL  - 50
ER  -
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