Adhikari, R; D'Ayala, D; (2019) Numerical Seismic Performance Assessment of Pre-Earthquake Stone Masonry Residential Building Typology in Light of 2015 Nepal Earthquake. In: Tiziana, Rossetto, (ed.) Proceedings of the Society for Earthquake and Civil Engineering Dynamics Conference (SECED 2019). SECED (Society for Earthquake and Civil Engineering Dynamics): Greenwich, London, UK.

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Abstract

Despite economic and human losses, disasters teach us very important lessons. It is important to collect, document, analyse and understand the causes and impacts of a disaster such as an earthquake to minimize losses in future disastrous events. This paper thus presents a discussion on the widespread damage sustained by the stone in mud mortar masonry typology after the 2015 Nepal earthquake. Then, the common construction characteristics and major failure modes observed in the 2015 earthquake are identified and a numerical seismic performance assessment is conducted on a representative index building of the existing stone in mud mortar masonry typology. The results of non-linear pushover analyses yield that the lateral capacity of these buildings is very low and the separation of walls in the out-of-plane direction is the major failure mechanism, also widely observed during the earthquake. Seismic retrofitting of these existing buildings is thus urgent, and the results of this study will help informing the decision makers in adopting appropriate effective retrofit measures.

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