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{Thiers-Moggia:2019:10.1002/eqe.3147,
author = {Thiers-Moggia, R and Malaga, Chuquitaype C},
doi = {10.1002/eqe.3147},
journal = {Earthquake Engineering and Structural Dynamics},
pages = {528--547},
title = {Seismic protection of rocking structures with inerters},
url = {http://dx.doi.org/10.1002/eqe.3147},
volume = {48},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The seismic behaviour of a wide variety of structures can be characterized by the rocking response of rigid blocks. Nevertheless, suitable seismic control strategies are presently limited and consist mostly on preventing rocking motion all together, which may induce undesirable stress concentrations and lead to impractical interventions. In this paper, we investigate the potential advantages of using supplemental rotational inertia to mitigate the effects of earthquakes on rocking structures. The newly proposed strategy employs inerters, which are mechanical devices that develop resisting forces proportional to the relative acceleration between their terminals and can be combined with a clutch to ensure their rotational inertia is only employed to oppose the motion. We demonstrate that the inclusion of the inerter effectively reduces the frequency parameter of the block, resulting in lower rotation seismic demands and enhanced stability due to the well-known size effects of the rocking behaviour. The effects of the inerter and inerter-clutch devices on the response scaling and similarity are also studied. An examination of their overturning fragility functions reveals that inerter-equipped structures experience reduced probabilities of overturning in com- parison with un-controlled bodies, while the addition of a clutch further improves their seismic stability. The concept advanced in this paper is particularly attractive for the protection of rocking bodies as it opens the possibility of non-locally modifying the dynamic response of rocking structures without altering their geometry.
AU  - Thiers-Moggia,R
AU  - Malaga,Chuquitaype C
DO  - 10.1002/eqe.3147
EP  - 547
PY  - 2019///
SN  - 0098-8847
SP  - 528
TI  - Seismic protection of rocking structures with inerters
T2  - Earthquake Engineering and Structural Dynamics
UR  - http://dx.doi.org/10.1002/eqe.3147
UR  - http://hdl.handle.net/10044/1/66647
VL  - 48
ER  -
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