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A cost-effective retrofitting technique for urm buildings based on steel encirclements in openings: a case study
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Advisor(s)
Abstract(s)
A project named PERSISTAH is being developed to study the seismic vulnerability of primary
schools in Huelva (Spain) and the Algarve (Portugal). This area has a moderate seismicity
but this is affected by a nearby area where earthquakes of large magnitude (Mw≥6) and longreturn
periods happen.
The seismic vulnerability of URM (UnReinforced Masonry) buildings has been observed and
analysed in the last decades. The seismic retrofitting of these buildings is required in order to
improve their seismic behaviour. Many retrofitting techniques have been developed for that
purpose, most of them very complicated and expensive. Therefore, these are not appropriate
to retrofit a large number of buildings. This is especially relevant in areas of moderate seismicity
where the cost-efficiency ratio must be carefully considered.
The aim of this paper has been to develop a simple, effective and affordable technique to retrofit
these buildings. These buildings are characterised by numerous openings which causes a
great weakness in the URM walls. Then, a technique that consists in installing a steel encirclement
or a grille in the openings of the walls has been proposed. This is a specific retrofitting
technique for URM walls since this technique substantially improves the seismic capacity
of these structures.
To test the technique a case study is proposed. The building under study is a primary school
located in Huelva and built in 1961. Results have shown that the capacity of the building is
notably increased. Also, the performance point and the damage level of the structure are decreased.
Description
Keywords
URM buildings Retrofitting technique Performance-based method Seismic behaviour Nonlinear analysis
Citation
María-Luisa Segovia-Verjel; E. Justo-Moscardó; Antonio Morales-Esteban; María-Victoria Requena-García-Cruz; Emilio Romero-Sánchez; Jaime de-Miguel-Rodríguez; Estêvão, João M. C.. 2019. "A cost-effective retrofitting technique for URM buildings based on steel encirclements in openings: a case study". In COMPDYN 2019: 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Crete, Greece, 4955-4967. Eccomas Proceedia.