Seismic Vulnerability Assessment of Mixed Masonry-RC Residential Buildings
Date
2021-09
Authors
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Journal ISSN
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Publisher
Pulchowk Campus
Abstract
The practice of unreinforced masonry has been around since ages. In seismically
active zones like Nepal, it is utmost for the structures to be designed by following
proper seismic design criteria. However, the majority of older unreinforced buildings
in Nepal are non-engineered or semi-engineered constructions with inadequate
seismic detailing. A detailed visual assessment of the Panauti municipality area, led to
the identification of a unique building typology. The term “mixed Masonry-RC”
represents the typology with one or two centrally located reinforced concrete columns
supporting concrete slabs and beams spanning along the grid of columns which
altogether rest over peripheral load bearing unreinforced brick masonry in cement
mortar. A total of five building models were taken which belonged to this typology.
The buildings were modelled in SAP2000 and pushover analysis was performed. This
was followed by generation of fragility curves under different Peak Ground
Accelerations (PGAs) of response spectra in NBC 105:2020. The fragility curves thus
obtained were used to understand the vulnerability of the structure to considered
earthquakes. This study can be further extended for the seismic assessment of similar
typology buildings and for appropriate recommendation of strengthening measures.
Description
The practice of unreinforced masonry has been around since ages. In seismically
active zones like Nepal, it is utmost for the structures to be designed by following
proper seismic design criteria.
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Citation
MASTER OF SCIENCE IN STRUCTURAL ENGINEERING