Pounding in Nepalese school buildings

Ted Cross, Flavia De Luca, Raffaele De Risi, Tek Raj Rana, Tim Mitchell, Alan Sweetman

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

The seismic performance of a two storey RC school in Nepal is assessed using non-linear time history analysis (NLTHA). The school was constructed by Pahar Trust and utilizes a seismic gap to avoid issues caused by the torsional effect of the off centre stair case. A fibre model the of RC structure is implemented in finite element (FE) open-source software OpenSees, where NLTHA is employed to assess the seismic performances under different input motions. In particular, three sets of accelerograms are selected: (i) recorded waveforms of the 2015 Gorkha earthquake, (ii) a code-compatible selection compliant with pre-Gorkha earthquake probabilistic seismic hazard analysis (PSHA), (iii) a code-compliant selection compatible with post-Gorkha PSHA. The inter-storey drift demand and the effectiveness of the seismic gap is then assessed. The inter-storey drift values are used to verify the performances of the school against Eurocode 8 capacity limit. The seismic gap provides adequate clearance to avoid pounding when the structure is exposed to the Gorkha ground motions and life safety limit state (10% probability is 50 years) motions for pre-Gorkha PSHA. The structure exhibits pounding with a small number of the post-Gorkha ground motions. A fragility curve for pounding is finally obtained for the school using Cloud Analysis linear regression approach.
Original languageEnglish
Title of host publicationSECED 2019 Proceedings
PublisherSECED
Chapter26.1
Number of pages12
Publication statusPublished - 9 Sep 2019
EventSociety for Earthquake and Civil Engineering Dynamics Conference - Greenwich, London, United Kingdom
Duration: 9 Sep 201910 Sep 2019
Conference number: 2019
https://seced.org.uk/2019

Conference

ConferenceSociety for Earthquake and Civil Engineering Dynamics Conference
Abbreviated titleSECED
CountryUnited Kingdom
CityLondon
Period9/09/1910/09/19
Internet address

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