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Retrofitting of Historical Masonry Buildings in Seismic Zones

Retrofitting of Historical Masonry Buildings in Seismic Zones
Auteur(s): , , , ,
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Présenté pendant IABSE Symposium: Sustainable Infrastructure - Environment Friendly, Safe and Resource Efficient, Bangkok, Thailand, 9-11 September 2009, publié dans , pp. 97-104
DOI: 10.2749/222137809796088422
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The paper is focused on the analysis, redesign and rehabilitation solutions applied for old existing structures in seismic zones.

The old malting building, erected between 1857-1876 at the “...
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Détails bibliographiques

Auteur(s):




Médium: papier de conférence
Langue(s): anglais
Conférence: IABSE Symposium: Sustainable Infrastructure - Environment Friendly, Safe and Resource Efficient, Bangkok, Thailand, 9-11 September 2009
Publié dans:
Page(s): 97-104 Nombre total de pages (du PDF): 6
Page(s): 97-104
Nombre total de pages (du PDF): 6
Année: 2009
DOI: 10.2749/222137809796088422
Abstrait:

The paper is focused on the analysis, redesign and rehabilitation solutions applied for old existing structures in seismic zones.

The old malting building, erected between 1857-1876 at the “Timisoreana” Brewery, is a five storeys masonry structure and a tower composed of: walls of 140 – 50 cm thickness; inter-storey floors - brick masonry vaults supported by steel profiles; a tower, of about 14 m height and 2.80 m diameter, supported by an interior dome.

The main structural damages were: vertical cracks in the tower masonry structure; corrosion of steel members: horizontal circular rings for confining the tower; profiles for supporting the floor masonry vaults.

The static and dynamic analysis at different actions showed up major structural vulnerability, mainly due to the period of design and erection (19th century).

In order to preserve the old building as architectural monument and to reduce the seismic failure risk, the following strengthening solutions were designed and applied:

  • for general stability of masonry tower: vertical reinforcement bars embedded at the upper side of the tower in a RC beam and welded on steel profiles placed in the dome, at the tower base; vertical CFRP wrap on the entire tower height;

  • in masonry structure, at zones with stresses greater that masonry tensile strength, were placed horizontal RC straps: at the tower – dome crossing; at the base of dome that supports the tower; at the level of steel profiles for its embedding into vertical masonry structure;

  • on the vertical cracked tower due to temperature variations: corroded circular steel rings for confining the tower on outside face were replaced by horizontal CFRP strips.

    The strengthening solutions for rehabilitation of historic structure were selected in order to obtain technical and economical advantages: safe behaviour at seismic actions; slight change of overall structural stiffness; easy strengthening technology and short refurbishment period; low rehabilitation cost. The rehabilitation performed in 2008 is presented during execution on-site.
Mots-clé:
renforcement