Abstract
The present paper aims at inspecting the structural behaviour of a typical masonry aggregate located in the historical centre of Cercola, a municipality in the province of Naples. The clustered building under study consists of four structural units mutually connected to each other made of tuff stone and deformable floors. Two distinct structural units, namely in heading and intermediate places, in both isolated and aggregate conditions, are examined to estimate the influence of structural positions on the global seismic response of the examined case study buildings. For this purpose, non-linear static analyses are performed using the 3MURI software. Pushover analyses are conducted to both evaluate the seismic behaviour of examined structural units and improve their earthquake performances while considering proper retrofit interventions on vertical and horizontal structures. The analysis results are plotted in terms of risk factor, stiffness, and ductility. Finally, a set of fragility functions are derived to point out the structural response of the case study buildings before and after retrofit interventions. From the achieved results, it is highlighted that retrofit interventions improve the structural performances of the buildings, especially those of structural units in aggregate conditions.
Highlights
The present study aims to focus on the seismic response of a masonry aggregate located in Cercola, a municipality near the city of Naples
From a structural point of view, it is composed of 4 structural units mutually interacting, represented by two external cells occupying the head position and two internal ones placed in intermediate position), which spread over 3 floors above ground with an average inter-story height of 2.80 m
The previously mentioned structural units were analysed in isolated conditions to estimate their global seismic response compared to that of SUs placed in clustered conditions
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. SUs can differ significantly from the capacity of the entire aggregate, especially in the case of deformable floors and masonry with poor mechanical features This type of construction, characterized by a highly non-linear response, can lead to evaluation errors that could compromise the result of the seismic evaluation. From a structural point of view, it is composed of 4 structural units mutually interacting, represented by two external cells occupying the head position and two internal ones placed in intermediate position), which spread over 3 floors above ground with an average inter-story height of 2.80 m.
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