Closed-form solution based genetic algorithm software: Application to multiple cracks detection on beam structures by static tests

Greco, Annalisa; Pluchino, Alessandro; Cannizzaro, Francesco; Caddemi, S.; Caliò, Ivo

doi:10.1016/j.asoc.2017.11.040

Cited by 28 publications

(13 citation statements)

References 51 publications

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“…Equations 21 and 22, in view of Equation 23, show the dependence of the position x i and intensity λ i , of the ith crack, on the positions and intensities of the cracks denoted as k = 1, …, i − 1. The latter circumstance implies that Equations 21 and 22 apply to a sequential identification of each single crack separately and allow to detect and quantify a crack along prescribed segments of the beam as indicated by the chosen sensor layout adopted in the execution of the nondestructive test.…”

Section: Identification Of the Crack Positions And Intensitiesmentioning

confidence: 99%

“…In the pioneering study by Sanayei and Onipede, an analytical method that makes use of static data test is employed to assess the damage in frames. More recently, regarding the static identification of damage parameters in structures, further studies were devoted to propose an alternative strategy for frames, to assess instrumental errors with reference to beam‐like structures, to the identification of damage in arches, to the identification of diffuse damage in beam‐like structures and to the identification of multiple concentrated cracks in beams by making use of evolutionary algorithms for the optimization procedure …”

Section: Introductionmentioning

confidence: 99%

“…More recently, regarding the static identification of damage parameters in structures, further studies were devoted to propose an alternative strategy for frames, [19] to assess instrumental errors with reference to beam-like structures, [20] to the identification of damage in arches, [21] to the identification of diffuse damage in beam-like structures [22] and to the identification of multiple concentrated cracks in beams by making use of evolutionary algorithms for the optimization procedure. [23] In this paper, by utilizing the solution provided by the mentioned distributional approach, a further contribution towards the identification of multiple cracks in straight beams by static response measurements, leading to explicit expressions for damage positions and severities, is provided. In particular, the explicit solution of a multicracked beam is first presented as dependent on four integration constants, related to the boundary conditions (b.c.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A procedure for the identification of multiple cracks on beams and frames by static measurements

Caddemi

Caliò

Cannizzaro

et al. 2018

Struct Control Health Monit

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In this work a model of the Euler-Bernoulli beam in presence of multiple concentrated open cracks, based on the adoption of a localized flexibility model, is adopted. The closed form solution in terms of transversal displacements due to static loads and general boundary condition is exploited to propose an inverse damage identification procedure. The proposed identification procedure does not require any solution algorithm, on the contrary is formulated by means of simple explicit sequential expressions for the crack positions and intensities including the identification of the integration constants. The number of possible detected cracks depends on the couples of adopted sensors.Undamaged beam zones can also be easily detected in relation to the sensor positions. The analytical character of the explicit expressions of the identification procedure makes the inverse formulation applicable to damaged beams included in more complex frame structures.The proposed procedure is applied for the identification of the number, position and intensity of the cracks along simple straight beams and also to more complex frame structures with the aim of showing its simplicity for engineering applications. In addition, the robustness of the methodology here described is shown through an accurate analysis of the basic assumptions on which the theory relies, and by means of a study of the effect of noise on the identification results.

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Section: Identification Of the Crack Positions And Intensitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A procedure for the identification of multiple cracks on beams and frames by static measurements

Caddemi

Caliò

Cannizzaro

et al. 2018

Struct Control Health Monit

Self Cite

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“…The methodology here proposed adopts the SOC earthquake engine of the OFC model in the context of agent-based simulations. Agent-based (or multi-agent) simulations are a powerful computational tool that has been extensively applied in several fields to model complex phenomena [27][28][29][30][31][32][33][34][35][36]. This approach has been here implemented by means of a new software, called ABES (Agent-Based Earthquake Simulator) and realized within the programmable multi-agent environment NetLogo [37], with the purpose of assessing the seismic vulnerability of urban areas in the critical state.…”

Section: Introductionmentioning

confidence: 99%

A New Agent-Based Methodology for the Seismic Vulnerability Assessment of Urban Areas

Greco

Pluchino

Barbarossa

et al. 2019

IJGI

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In order to estimate the seismic vulnerability of a densely populated urban area; it would in principle be necessary to evaluate the dynamic behaviour of individual and aggregate buildings. These detailed seismic analyses, however, are extremely cost-intensive and require great processing time and expertise judgment. The aim of the present study is to propose a new methodology able to combine information and tools coming from different scientific fields in order to reproduce the effects of a seismic input in urban areas with known geological features and to estimate the entity of the damages caused on existing buildings. In particular, we present new software called ABES (Agent-Based Earthquake Simulator), based on a Self-Organized Criticality framework, which allows to evaluate the effects of a sequence of seismic events on a certain large urban area during a given interval of time. The integration of Geographic Information System (GIS) data sets, concerning both geological and urban information about the territory of Avola (Italy), allows performing a parametric study of these effects on a real context as a case study. The proposed new approach could be very useful in estimating the seismic vulnerability and defining planning strategies for seismic risk reduction in large urban areas

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“…Several optimization methods have been used to solve the inverse problem for crack identification, for example, classical optimization technique of minimizing a least square criterion [8,42], the minimization of the mean-square and min-max formulations [43], or evolutionary algorithms [44]. Among them, genetic algorithm (GA) optimization techniques have been successfully included in fault detection methods applied to mechanical systems, for instance, in [45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Elliptical Crack Identification in a Nonrotating Shaft

Muñoz-Abella

Rubio

et al. 2018

Shock and Vibration

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It is known that fatigue cracks are one of the most important problems of the mechanical components, since their propagation can cause severe loss, both personal and economic. So, it is essential to know deeply the behavior of the cracked element to have tools that allow predicting the breakage before it happens. The shafts are elements that are specially affected by the described problem, because they are subjected to alternative compression and tension stresses. This work presents, firstly, an analytical expression that allows determining the first four natural frequencies of bending vibration of a nonrotating cracked shaft, assumed as an Euler–Bernoulli beam, with circular cross section under pinned-pinned conditions, taking into account the elliptical shape of the crack. Second, once the direct problem is known, the inverse problem is approached. Genetic Algorithm technique has been used to estimate the crack parameters assuming known the natural frequencies of the cracked shaft.

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Closed-form solution based genetic algorithm software: Application to multiple cracks detection on beam structures by static tests

Cited by 28 publications

References 51 publications

A procedure for the identification of multiple cracks on beams and frames by static measurements

A procedure for the identification of multiple cracks on beams and frames by static measurements

A New Agent-Based Methodology for the Seismic Vulnerability Assessment of Urban Areas

Elliptical Crack Identification in a Nonrotating Shaft

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