The St. Silvestro Belfry in L’aquila: From the Rehabilitation Works to the Actual Performance in Terms of Dynamic Properties and Fragility Functions Estimation

Masonry towers, located in seismic zones, are vulnerable and prone to damages up to compromise their stability. The scatter of data on the mechanical properties of masonry, geometry and boundary conditions determine a lack of building knowledge on their expected behaviour. Therefore the assessment of the seismic capacity represents a critical task. This paper contributes to the issue of seismic analysis of masonry towers, focusing a meaningful case study: the St.Silvestro belfry in L’Aquila, Italy. The tower, severely damaged by the 2009 earthquake sequence, underwent extensive restoration works, endeavoured to mitigate its vulnerability. The observed seismic damage, the performed no-destructive testing campaign and the accomplished rehabilitation measures are described in the paper. The authors appraised the actual seismic performances of the St.Silvestro belfry, reinforced by the last restoration works. At first, the Operational Modal Analysis (OMA) is carried out to enhance building knowledge. In a second step, a refined finite element model is calibrated on the results from OMA to seize the actual dynamic response. Ultimately, by using the updated finite element model, the authors estimate the fragility curves in terms of peak ground acceleration using truncated incremental dynamic analyses.

show abstract

“…On 2 December 2019, the authors carried out the dynamic investigations using Operational Modal Analysis (OMA) [36,40,41].…”

Section: Dynamic Identification Of the Stsilvestro Belfry: Description And Resultsmentioning

confidence: 99%

Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…It expresses the probability that some dreaded events occur (structural collapse) as a function of some intensity measures IM (typically a measure of acceleration, deformation, or force in an earthquake, hurricane, or other extreme loading condition). The ground motion intensity measure (Baker, 2015; Capanna et al, 2020), used in this article, is the PGA itself. The use of the PGA rather than the peak spectral acceleration and their spectral shapes descends from the Italian seismic code; it classifies the seismic risk of the Italian territory according to the PGA levels.…”

Section: Numerical Model and Analysesmentioning

confidence: 99%

Fragility functions and behavior factors estimation of multi-story cross-laminated timber structures characterized by an energy-dependent hysteretic model

2020

Self Cite

View full text Add to dashboard Cite

The authors assessed the fragility functions and behavior factors of cross-laminated timber (CLT) structures. The structures derive from the assembly of single CLT wall panels characterized by different configurations. The extended energy-dependent generalized Bouc-Wen (EEGBW) hysteresis model describes their inelastic behavior: the experimental data obtained by Gavric et al. are used to calibrate the hysteretic models of the considered cases. The truncated incremental dynamic analysis of the building models under a set of earthquake records yields the fragility functions and behavior factors. The copious results allow a comparative study between multiple structural configurations characterized by different constructive features. The behavior factors match those already proposed by the scientific literature. An analytical relationship was estimated relating the behavior factors and a suite of parameters (e.g. joint density, slenderness ratio of the CLT panel, and number of stories) representative of the tested cases. The fragility functions evidence the notable role of the number of stories over the failure probability, rather than the particular wall configuration.

show abstract

The St. Silvestro Belfry in L’aquila: From the Rehabilitation Works to the Actual Performance in Terms of Dynamic Properties and Fragility Functions Estimation

Cited by 2 publications

References 0 publications

Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

Operational Modal Analysis, Model Update and Fragility Curves Estimation, through Truncated Incremental Dynamic Analysis, of a Masonry Belfry

Fragility functions and behavior factors estimation of multi-story cross-laminated timber structures characterized by an energy-dependent hysteretic model

Contact Info

Product

Resources

About