- Seismic Behaviour of Masonry Arches with Tie-Rods: Dynamic Tests on a Scale Model
- C. Calderini ; S. Lagomarsino ; M. Rossi ; G. Decanio ; M.L. Mongelli ; I. Roselli
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: masonry arches ; Shaking table tests ; displacement capacity
- Description
- In arches and vaults, tie-rods play a decisive role in the control of horizontal thrusts produced by both permanent and seismic loadings. For these reasons, still today tie-rods are widely used as reliable technique for the reinforcement of masonry buildings. Usually, steel bars similar in size and shape to ancient ones and fixed to stonework by means of bolts or plates are adopted. However, some innovative solutions to improve the technique were recently proposed. The common aim of such solutions is to increase the displacement capacity and dissipation of the arch-pillars-rod system under seismic actions. In this paper, the effectiveness of flexible tie-rods to improve the seismic response of arch-pillars system is assessed by mean of shaking table tests and simple analytical models developed in the framework of performance-based design.
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- Evaluation and reduction of the vulnerability of masonry buildings
- S. Lagomarsino ; G. Magenes
- Book Title / Journal:
- Year: 2009 , Volume: , Series:
- Earthquake engineering
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- The Prarolo Railway Arch Bridge in Italy: Structural Assessment and Analysis through Traditional Mechanical Methods
- S. Lagomarsino ; S. Resemini
- ARCH'07: 5th International Conference on Arch Bridges, Multicomp, Lda Publishers, Madeira, pp. 237-248
- Book Title / Journal:
- Year: 2007 , Volume: , Series:
- Bridge management ; Bridges
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- The Vulnerability Assessment of Current Buildings by a Macroseismic Approach Derived from the EMS-98 Scale
- A. Bernardini ; S Giovinazzi ; S. Lagomarsino ; S- Parodi
- Book Title / Journal: 3rd International Congress of Seismic Engineering, Asociación Española de Ingeniería Sísmica, Girona, Spain
- Year: 2007 , Volume: , Series:
- Earthquake engineering
- Keywords: Vulnerability assessment ; Damage scenario
- Description
- A hierarchical family of Damage Probability Matrices (DPM) has been derived in this paper from the ones implicitly contained in the EMS-98 Macroseismic Scale for 6
vulnerability classes. To this aim the linguistic definitions provided by the scale, and the associated fuzzy sub-sets of the percentage of buildings, have been completed according to reliable hypotheses.
A parametric representation of the corresponding cumulative probability distributions is moreover provided, through a unique parameter: a vulnerability index variable in the range from 0 to 1 and independent of the macroseismic intensity. Finally, an innovative macroseismic approach allowing the vulnerability analysis of building typologies is defined within the European Macroseismic Scale (EMS-98) and qualitatively related to the vulnerability classes. Bayes’ theorem allows the upgrading of the frequencies when further data about the built-environment or specific properties of the buildings are available, allowing
the identification of a different behaviours with respect to the one generally considered for the typology. Fuzzy measures of any damage function can be derived, using parametric or nonparametric damage probability matrices. For every result of the seismic analysis, the procedure allows supply to the user of the final uncertainty connected with the aforementioned fuzzy relation between the probability of the damage grade, the macroseismic intensity and the vulnerability classes.
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