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Infill wall topology and intensity parameters effects on steel structures’ seismic response

Research output: Chapter in Book/Report/Conference proceedingConference contribution

This paper quantifies the interrelation between infill wall topologies and structural damage; steel frame buildings suffer during strong seismic events. Thus, nonlinear dynamic analyses for a set of five steel frame structures were carried out considering all material nonlinearities and four different infill wall topologies. Artificial accelerograms were composed, and nonlinear dynamic analyses have been carried out to evaluate the structural responses. The peak ground acceleration (PGA), strong motion duration after Trifunac/Brady (SMDTB), Arias intensity (IA) and alternative spectral intensities (SIs) have been calculated while the Park/Ang overall structural damage index (OSDIPA) and the maximum inter-story drift ratio (MISDR).
This work focus on quantifying the interdependency between the topology of infill walls and its seismic response. Numerical results have shown, infill walls proved to have a very positive contribution to the structure’s seismic response, giving an average of 47% reduction of the maximum recorded OSDIPA as well as an 81% decrease in the mean OSDIPA values between bare frame structure, and its infill wall reinforced counterparts. Similar results were observed for the MISDR as well, where an approximate 67.5% reduction in the maximum values, as well as an approximate 61% for mean values, have been recorded.
Results revealed a strong correlation between IA and the MISDR and OSDIPA with correlation values ranging from 0.745 to 0.892, while the SIs presented values ranging from 0.911 to 0.731. PGA, on the other hand, exhibited decisively medium correlation in all cases, with values ranging from 0.589 to 0.687. SMDTB exhibited the worst correlation, regardless of damage index
and infill wall topology with values ranging from 0.047 to 0.123.
Original languageEnglish
Title of host publication11th National Conference on Earthquake Engineering 2018 (11NCEE): Integrating Science, Engineering, & Policy
Subtitle of host publicationProceedings of a meeting held 25-29 June 2018, Los Angeles, California, USA
Place of PublicationLos Angeles
PublisherEarthquake Engineering Research Institute
Pages5212-5222
Number of pages11
ISBN (Print)9781510873254
Publication statusPublished - 25 Jun 2018
EventEleventh U.S. National Conference on Earthquake Engineering: Integrating Science, Engineering & Policy - Los Angeles, United States
Duration: 25 Jun 201829 Jun 2018
Conference number: 11

Conference

ConferenceEleventh U.S. National Conference on Earthquake Engineering
Abbreviated titleNCEE
CountryUnited States
CityLos Angeles
Period25/06/1829/06/18

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