Directionality of Next-Generation Intensity Measures in the 2023 Turkey Earthquake

Synopsis

At present, ground-motion prediction models neglect the directionality observed in horizontal components of earthquake ground motions, that is, the important changes in ground-motion intensity that occur with changes in azimuth. This talk presents an investigation of the directionality of FIV3 and SaAvg, two Next-Generation Intensity Measures (NGIMs) that better correlate with structural collapse than spectral acceleration at the fundamental period of the structure. These studies use data collected during the 6 February 2023, Mw 7.8 Pazarcık and Mw 7.5 Elbistan earthquake doublet in the Kahramanmaraş region of Türkiye, which resulted in the collapse of more than 35,000 buildings and caused almost 60,000 fatalities. I will discuss variation of the NGIMs with changes in the orientation; variation of NGIMs with changes in the period of vibration; attenuation of the NGIMs with increasing distance; and spatial distribution of the orientation of maximum NGIMs.

About the speaker

Dr Miguel Bravo-Haro is a Lecturer in Sustainable Civil Engineering Structures in the Department of Engineering at City St George’s, University of London. His areas of research span from digital infrastructure and condition monitoring to data-driven structural health monitoring and earthquake engineering. Among his current projects are the development of digital twins for Offshore Renewable Energy systems (fixed and floating), data-driven algorithms for early damage detection of railway bridges, the development of low-cost sensors for structural monitoring in seismic regions and probabilistic methods applied to engineering problems.

These projects are in collaboration with multiple academic and industry partners. At Epsimon, Miguel leads the development of digital infrastructure such as real-time monitoring systems and bespoke software solutions across monitoring projects.

Before City St George’s, he was a postdoctoral researcher in the Centre for Smart Infrastructure and Construction (CSIC) at the University of Cambridge, where he worked on digitalisation of infrastructure, structural health monitoring and data-driven solutions for better assessment of the structural integrity for a wide range of infrastructure assets.

Miguel obtained his diploma in civil engineering, as well as his MSc in Earthquake Engineering from the University of Chile. Before completing his PhD at Imperial College London on the seismic inelastic response of steel structures, he worked as a consultant structural engineer in Chile.

Registration

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Further information

This online talk is organised by SECED Young Members. For further information, please contact Maria Liapopoulou (This email address is being protected from spambots. You need JavaScript enabled to view it.).

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