Probabilistic reliability assessment of a heritage structure under horizontal loads

Beconcini, Maria Luisa; Croce, Pietro; Marsili, Francesca; Muzzi, Martina; Rosso, Elisa

doi:10.1016/j.probengmech.2016.01.001

Cited by 28 publications

(15 citation statements)

References 14 publications

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“…In Beconcini et al (2016), a methodology for the probabilistic reliability assessment of heritage buildings is presented where Bayesian updating techniques were implemented for a rational use of the collected information. In Sousa et al (2016a), a methodology for the holistic assessment of timber elements was also described where information gathered in different scales was combined by following a probabilistic framework that allows for the structural assessment of existing timber elements with possibility of inference and updating the mechanical properties of structural elements through Bayesian methods.…”

Section: Bayesian Updatingmentioning

confidence: 99%

Reliability-based design of interventions in deteriorated timber structures

Sousa

Neves

2018

International Journal of Architectural Heritage

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When accommodating new uses or mitigating the consequences of deterioration, the strength increase of existing structures is significantly more onerous than a similar increase at the design stage of new structures. The safety methods prescribed in current standards were defined for the design of new structures and are frequently conservative for the assessment and repair of existing structures. This work will introduce the fundamental aspects of structural reliability and their application in the context of existing timber structures regarding the use of target reliability indices. Firstly, the fundamental methods of structural reliability are introduced. The use of reliability methods requires the use of more detailed information in respect with material properties, loads and model uncertainty. The main sources of such information are described. After overviewing the fundamental methods of structural reliability, methods to introduce additional information, namely results of non-destructive tests in the structural assessment are discussed. Finally, the intervention on a timber structure will be analyzed, within a case study, by considering different repair scenarios that lead to discussions on different suitable safety thresholds for existing and repaired structures.

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Section: Bayesian Updatingmentioning

confidence: 99%

Reliability-based design of interventions in deteriorated timber structures

Sousa

Neves

2018

International Journal of Architectural Heritage

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“…In recent years, Bayesian inference has become a popular approach to model and solve inverse problems in different areas (Dashti and Stuart 2017), but few applications can be found in the field of existing masonry structures. Bayesian model updating techniques have been applied by Bartoli et al (2017Bartoli et al ( , 2019 for the analysis of masonry towers, by Conde et al (2018) and De Falco et al (2018) for the parameter identification of existing masonry bridges, and by Beconcini et al (2016) to establish PDFs for the variables involved in the probabilistic reliability assessment of heritage buildings, describing the case study of a masonry water work. However, the Bayesian approach is one of the most suitable way for defining probabilistic models for the assessment of existing buildings (Beconcini et al 2016) due to the possibility to combine information coming from theoretical models, experts' judgments, and databases of test results with a limited number of experimental test results obtained on the considered structure.…”

Section: Introductionmentioning

confidence: 99%

Bayesian Methodology for Probabilistic Description of Mechanical Parameters of Masonry Walls

Croce

Beconcini

Formichi

et al. 2021

ASCE-ASME J. Risk Uncertainty Eng. Syst., Part A: Civ. Eng.

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In consideration of the high vulnerability of the built environment, the assessment of seismic behavior of existing masonry buildings is a key topic in view of their retrofitting and reuse. Because masonry's behavior depends on complex nonhomogeneous, anisotropic, asymmetric, and nonlinear properties, the definition of suitable mechanical models is still a critical issue, especially for stone masonry. Structural analyses of existing masonry buildings in seismic-prone areas are thus significantly influenced by the adopted mechanical models and assumptions about their relevant masonry properties, which are characterized by large uncertainty. In this study, a procedure for the definition of masonry classes and probability density functions of relevant mechanical parameters, such as elastic modulus and shear modulus, is proposed. The general procedure is illustrated referring to a significant number of in situ double-flat-jack test results on stone masonry obtained by the authors during an ad hoc experimental campaign. Finally, combining information on masonry quality obtained by visual inspection with results of in situ tests, a Bayesian methodology is proposed for the updating of masonry mechanical parameters, thereby providing the basis for a more refined probabilistic assessment of the seismic risk index.

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“…Understanding and modelling the mechanical behavior of masonry elements is a long-standing challenge in civil engineering [ 3 ]. In fact, the characterization of mechanical properties of masonry is certainly one of the most delicate issues in the process, especially in the field of heritage structures, where modern studies suggest also to resort to advanced probabilistic approaches [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

et al. 2021

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The evaluation of the shear behavior of masonry walls is a first fundamental step for the assessment of existing masonry structures in seismic zones. However, due to the complexity of modelling experimental behavior and the wide variety of masonry types characterizing historical structures, the definition of masonry’s mechanical behavior is still a critical issue. Since the possibility to perform in situ tests is very limited and often conflicting with the needs of preservation, the characterization of shear masonry behavior is generally based on reference values of mechanical properties provided in modern structural codes for recurrent masonry categories. In the paper, a combined test procedure for the experimental characterization of masonry mechanical parameters and the assessment of the shear behavior of masonry walls is presented together with the experimental results obtained on three stone masonry walls. The procedure consists of a combination of three different in situ tests to be performed on the investigated wall. First, a single flat jack test is executed to derive the normal compressive stress acting on the wall. Then a double flat jack test is carried out to estimate the elastic modulus. Finally, the proposed shear test is performed to derive the capacity curve and to estimate the shear modulus and the shear strength. The first results obtained in the experimental campaign carried out by the authors confirm the capability of the proposed methodology to assess the masonry mechanical parameters, reducing the uncertainty affecting the definition of capacity curves of walls and consequently the evaluation of seismic vulnerability of the investigated buildings.

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Probabilistic reliability assessment of a heritage structure under horizontal loads

Cited by 28 publications

References 14 publications

Reliability-based design of interventions in deteriorated timber structures

Reliability-based design of interventions in deteriorated timber structures

Bayesian Methodology for Probabilistic Description of Mechanical Parameters of Masonry Walls

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

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