Application of sonic tests to the diagnosis of damaged and repaired structures

“…1) damaged by the 1990 earthquake, took place only six years later, in 1996 (De Benedictis et al [1]). The accurate on site and laboratory investigation confirmed that the earthquake was only worsening the situation of the materials and of the structure which was already highly damaged (Binda et al [2,3]). The removal of the plaster (which was made in the 1960s) from the remaining pillars of the central nave revealed the pre-existence of a diffused distribution of vertical cracks and spalling of the corners in the external leaf made with limestone (calcarenite) regular blocks (Fig.…”

Section: Introductionmentioning

confidence: 80%

Non-destructive testing techniques applied to the masonry and timber structures of the Crocifisso Church in Noto

Binda¹,

Cantini²,

Condoleo³

et al. 2007

WIT Transactions on the Built Environment, Vol 95

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After the partial collapse of the Cathedral of Noto in Sicily, damaged by the 1990 earthquake, which hit the oriental part of the Italian island, an extensive investigation carried out on site and in the laboratory allowed the detection of a pre-existing damage of the pillars due to long term behaviour of the material under compressive stresses. The investigation extended to other churches and buildings showed cases of progressive damage, which can in an unknown time, bring the structures to sudden collapse. This paper presents and discusses the preliminary results of the research carried out by the authors on the Crocifisso Church in Noto, built in the same period and with material similar to that of the Cathedral. The investigation programme was planned, aimed at evaluating the state of damage of the structure and at designing the preservation and restoration actions.

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“…However, when the general literature concerning heritage structures has been searched, some helpful works have been detected. The two of these works are about the Cathedral of Noto which were experienced a sudden partial collapse on 13th March 1996 (Binda et al 2001(Binda et al , 2003. In this event some columns of the cathedral were completely collapsed, which Fig.…”

Section: Example 1 a Reference Column Shown Inmentioning

confidence: 99%

Strength capacity of unreinforced masonry cylindrical columns under seismic transverse forces

Gürel

Pekgökgöz

Çılı

2011

Bull Earthquake Eng

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In this paper, the seismic resistance of unreinforced masonry (URM) cylindrical columns is investigated with an equivalent static analysis procedure. To this end, an existing numerical model developed for the stability analysis of masonry elements with rectangular cross-section is utilized and modified for the cylindrical columns. In the numerical model which takes into account the cracking of the sections and the second-order effects, the columns are divided ideally into sufficiently high number of elements, each having uniform curvature. The columns are modeled as prismatic cantilevers undergoing their own weights, eccentric vertical loads and distributed and concentrated static horizontal loads equivalent to the inertia actions. By considering two examples of columns, firstly a reference column and secondly a column from a real building, lateral seismic coefficient versus top drift level curves are obtained. On the basis of these curves, lateral load behavior of the columns is interpreted and maximum seismic load values which can be resisted by each column are determined. Implementing parametric analyses on the reference column, sensitivity of the seismic resistance to parameters such as column slenderness, magnitude and eccentricity of vertical top load, and the flexibility parameter is determined. The influence of some structural imperfections such as the deviation from vertical on the seismic resistance is also discussed in the paper.

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Application of sonic tests to the diagnosis of damaged and repaired structures

Cited by 86 publications

References 3 publications

Evaluation of consolidation of different porous media with hydraulic lime grout injection

Evaluation of consolidation of different porous media with hydraulic lime grout injection

Non-destructive testing techniques applied to the masonry and timber structures of the Crocifisso Church in Noto

Strength capacity of unreinforced masonry cylindrical columns under seismic transverse forces

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