Innovative technique for the base isolation of existing buildings

Alessandro De Stefano, Paolo Clemente, Stefano Invernizzi, Emiliano Matta, Antonino Quattrone

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

An innovative base isolation system has been recently proposed for the retrofitting of existing buildings, in which the isolation layer is inserted under the building foundations so that the building, along with its foundations, is isolated from the surrounding soil. The isolation layer resides in closely-spaced micro-tunnels, constructed under the entire width of the building. These micro-tunnels, along with the trenches around the building, isolate the structure from the surrounding soil. The execution of these micro-tunnels is the most critical construction stage, because it may result in settlements which can damage the structure. In this paper, the behaviour of an existing structure, consisting of a masonry wall subjected to tunnelling-induced ground subsidence, is analysed. A parametric study is conducted using 2-D nonlinear finite element analyses to understand the role of key factors such as strength and stiffness of soil and masonry, roughness of soil-structure interface, excavation sequence of tunnels, wall dimensions and openings configuration. The study identifies the design variables which influence the most the risk of structural damage and suggests the most effective damage symptoms to be monitored during construction.
Original languageEnglish
Publication statusPublished - 2015
Externally publishedYes
Event5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015 - Hersonissos, Crete, Greece
Duration: 1 Jan 2015 → …

Conference

Conference5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015
CountryGreece
CityHersonissos, Crete
Period1/1/15 → …

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All Science Journal Classification (ASJC) codes

  • Computers in Earth Sciences
  • Computational Mathematics
  • Geotechnical Engineering and Engineering Geology

Cite this

De Stefano, A., Clemente, P., Invernizzi, S., Matta, E., & Quattrone, A. (2015). Innovative technique for the base isolation of existing buildings. Paper presented at 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015, Hersonissos, Crete, Greece.