Minor destructive techniques applied to the mechanical characterization of historical rubble stone masonry structures

Lombillo, I.; Villegas, L.; Elices, J.

doi:10.1108/02630801011040860

Cited by 14 publications

(4 citation statements)

References 6 publications

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“…Flatjack is generally classified as a minor destructive test method used to obtain the elastic behavior of walls. This test method can be used in brick masonry, Earth walls, stone masonry or cob wall (Schuller, 2006; Lombillo et al , 2014; Rios and O'Dwyer, 2020a, b; Lombillo and Villegas, 2010). Unfortunately, destructive test techniques allow us to gather only a limited amount of data from very localized areas of the whole structure (Orban and Gutermann, 2009).…”

Section: Introductionmentioning

confidence: 99%

Development of shear strength index test probe: its application on historic structures

Pekmezci

2021

IJBPA

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PurposeMaterial properties, such as shear and compressive strength of masonry, have a crucial impact on the seismic analysis results of masonry structures. Considering that most of the historical buildings are masonry structures, the damage caused by obtaining shear strengths with known methods exceeds acceptable limits. Instead of traditional shear strength index tests, this paper presents a test technique that has been developed which causes less damage to the structure, to obtain mechanical properties in masonry structures.Design/methodology/approachA new approach to shear testing and a test probe has been developed to minimize the destructive effects of mechanical in situ testing on masonry structures. The comparison of the results obtained with reduced destruction level using the novel shear strength index test probe with those obtained from the traditional method is addressed. Masonry specimens were tested in the laboratory and in situ tests were carried out on 12 historical buildings.FindingsTest results obtained from the proposed probe shear strength index test were consistent with the results obtained from the conventional shear strength test both at the laboratory setting and in situ. Although a large number of data is needed for the validation of a method, satisfactory agreement with the conventional shear strength index test method was obtained.Originality/valueThe authors believe that the proposed method would give the opportunity to collect more mechanical strength data with much less destruction. The experimental work in the laboratory and in situ tests and their comparisons are the supportive and original values of this research.

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Section: Introductionmentioning

confidence: 99%

Development of shear strength index test probe: its application on historic structures

Pekmezci

2021

IJBPA

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“…This method creates many opportunities in the assessment of the stress state existing in masonry structures. [8][9][10] Structural health monitoring (SHM) is a very practical tool that, through the combination of a series of sensors, enables the evaluation of the structure in real time and over a long period of time. As it is a non-destructive tool, SHM is particularly recommendable when dealing with cultural heritage assets, where it is essential to respect the historical value of the constructions.…”

Section: Introductionmentioning

confidence: 99%

Device for continuous assessment of uniaxial stress of existing masonry structures: Laboratory validation

Boffill

Blanco

Lombillo

et al. 2019

Struct Control Health Monit

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Summary Knowledge of the mechanical characteristics of the materials and the behaviour of the structure play an important role in the process of intervention in ancient buildings. Moreover, the heterogeneity of these structures and/or the necessity to know how effective a reinforcement will be, among other aspects, make it necessary to propose new devices and/or techniques that enable the characterisation and evaluation of the associated masonry structures. This paper presents a slightly destructive technique for continuous monitoring of stress variations undergone by existing masonry structures. It is based on the estimation of the existing stress state, and its continuous monitoring over time. The development methodology and the validation of results obtained by the stress device in laboratory are discussed. To do so, among other factors, the effect of temperature variations on the sensor records are analysed, and the relationship between the stress variations and the displacements recorded in the monitored area are evaluated. After 10 months of continuous monitoring, it could be concluded that there was a good relationship between the stress variations applied in the masonry wall and the stresses measured by the device. Besides, a notable influence of the thermal variations on the sensor registers was found. A thermal correlation coefficient was proposed, which minimised the thermal incidence on the stresses registered. Moreover, a suitable relationship was also confirmed between the manual and continuous deformation measurements. The results show the capability of the proposed device to evaluate the continuous stress monitoring of existing masonry structures during intervention processes.

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“…Interventions in old constructions, given their fragility, require precision and detail in developing a rigorous previous diagnostic study, which provides the basis for decisions about the intervention techniques that should be adopted . In line with the article's topic, the monitoring systems undoubtedly contribute to knowledge of the evolution of specific processes before, during, or after an intervention.…”

Section: Introductionmentioning

confidence: 99%

Structural health monitoring of a damaged church: design of an integrated platform of electronic instrumentation, data acquisition and client/server software

Lombillo

Blanco

Pereda

et al. 2015

Struct. Control Health Monit.

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Summary A practical view is provided on the integration of electronic instrumentation, data acquisition, and software development systems applied to the analysis of pathological structural processes. This system will enable researchers to remotely monitor constructions; compile a register of historical data, creating files for postprocessing; and establish computer‐based protocols for evaluation of information, defining automatic alarms when the monitored data exceed preset limit values. This integration is based on the implementation of a remote terminal unit architecture in an industrial PC along with some other elements, namely, the following: suitable data acquisition cards for the type of sensors used, which continuously collect the data the sensors gather; the installation of an application server that periodically communicates with the system, extracting data while guaranteeing persistence; and finally, a web server, which provides remote access to both the data themselves and the system configuration, using a client application developed in JavaFX, a platform for developing rich Internet applications. As an example of the integration, the architecture of a system deployed in a Church in Comillas, Spain, is shown. The work carried out related to the register of existing damage is reported in order to explain the choice of the zones for deployment of the monitoring devices as well as the tasks involved in the installation of the sensors and other devices. Finally, the evolution is presented of the measurements taken during more than 1.5 years of monitoring, as well as their validation through comparison with those obtained by discrete in situ measurement. Copyright © 2015 John Wiley & Sons, Ltd.

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Minor destructive techniques applied to the mechanical characterization of historical rubble stone masonry structures

Cited by 14 publications

References 6 publications

Development of shear strength index test probe: its application on historic structures

Development of shear strength index test probe: its application on historic structures

Device for continuous assessment of uniaxial stress of existing masonry structures: Laboratory validation

Structural health monitoring of a damaged church: design of an integrated platform of electronic instrumentation, data acquisition and client/server software

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