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Academic literature on the topic 'Fiber Reinforced Cementitious Matrix (FRCM), Digital Image Correlation (DIC), confinement, masonry'
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Journal articles on the topic "Fiber Reinforced Cementitious Matrix (FRCM), Digital Image Correlation (DIC), confinement, masonry"
1
Torres, Benjamín, Francisco B. Varona, F. Javier Baeza, David Bru, and Salvador Ivorra. "Study on Retrofitted Masonry Elements under Shear Using Digital Image Correlation." Sensors 20, no. 7 (April 9, 2020): 2122. http://dx.doi.org/10.3390/s20072122.
Full textAbstract:
Architectural heritage is usually built with masonry structures, which present problems under lateral in-plane loading conditions, such as wind pressure or earthquakes. In order to improve the shear behavior of masonry, the use of a fabric-reinforced cementitious matrix (FRCM) has become an interesting solution because of its synergy of mechanical properties and compatibility with masonry substrates. For a proper structural evaluation, the mechanical behavior of reinforced masonry and the FRCM itself needs to be characterized. Hence, a numerical model to evaluate the FRCM reinforcement requires some mechanical parameters that may be difficult to obtain. In this sense, the shear behavior of masonry can be evaluated by means of diagonal tension tests on small specimens (71 × 71 cm). In this work, a digital image correlation (DIC) monitoring system was used to control displacements and cracking patterns of masonry specimens under shear stress (induced by diagonal tension with FRCM layers) applied to one or two sides. In addition, the mechanical behavior of FRCM coupons under uniaxial tensile tests was also registered with DIC. The displacement measurements obtained by DIC were validated with the measurements registered with LVDT. Unlike LVDT-based techniques, DIC monitoring allowed us to measure deformations in masonry during the full test, detecting crack initiation even before it was visible to the eye.
2
Carloni, Christian, Claudio Mazzotti, Marco Savoia, and Kolluru V. Subramaniam. "Confinement of Masonry Columns with PBO FRCM Composites." Key Engineering Materials 624 (September 2014): 644–51. http://dx.doi.org/10.4028/www.scientific.net/kem.624.644.
Full textAbstract:
The overarching goal of this work is to provide a fundamental understanding of the behavior of solid brick masonry columns confined with fiber reinforced cementitious matrix (FRCM) composites. FRCM is a newly-developed type of composite material comprised of a cementitious inorganic matrix (binder) and embedded fibers that are usually bundled to improve the bond between the matrix and the fibers. Compression tests were carried out to investigate the influence of the FRCM confinement and the brick patterns on the load-carrying capacity of the confined columns. Compression tests were conducted on brick masonry columns with different brick configurations. Digital image correlation measurements on the surface of the composite and on the surface of the brick for the control specimens were attempted in order to understand the role of the mortar joints and the arch effect across the section of the columns due to the confinement. The experimental results indicate that FRCM composites can effectively increase the load-carrying capacity of brick masonry columns and the failure mode could be different from the one observed for masonry columns confined with fiber-reinforced polymer (FRP) composites.
3
D'Anna, Jennifer, Giuseppina Amato, Jian Fei Chen, Giovanni Minafò, and Lidia La Mendola. "On the Use of Digital Image Correlation (DIC) for Evaluating the Tensile Behaviour of BFRCM Strips." Key Engineering Materials 817 (August 2019): 377–84. http://dx.doi.org/10.4028/www.scientific.net/kem.817.377.
Full textAbstract:
Fibre Reinforced Cementitious Matrix (FRCM) composites are becoming largely adopted for retrofitting masonry structures. These materials offer several advantages in comparison to Fibre Reinforced Polymer (FRP) composites, such as good resistance to fire and high temperatures, vapour permeability, possibility to be applied on wet surfaces, higher compatibility with the masonry substrate. However, the tensile behavior of FRCM materials is more complex compared to FRP composites, due to the limited tensile strength of the cement-based matrix. For this reason, FRCM materials require appropriate tensile characterization and, in this context, the use of non-conventional measurement systems, such as the Digital Image Correlation (DIC), can offer numerous advantages. This work presents an experimental study on the application of the DIC technique for the tensile characterization of Basalt Fibre Reinforced Cementitious Matrix (BFRCM) strips. Tensile tests were carried out on three series of specimens reinforced with one, two or three layers of basalt grid in order to investigate the effect of the reinforcement ratio on the tensile response of the composite strips. The test setup and the calibration of the DIC analyses are discussed. It is shown as the DIC allows obtaining detailed information on the tensile response, including the evaluation of the full strain field on the surface of the BFRCM strips and the location of cracks. Results are discussed also in terms of stress-strain curves and failure modes.
4
D'Antino, Tommaso, and Carlo Poggi. "Stress Redistribution in Glass Fibers of G-FRCM Composites." Key Engineering Materials 817 (August 2019): 520–27. http://dx.doi.org/10.4028/www.scientific.net/kem.817.520.
Full textAbstract:
Fiber reinforced cementitious matrix (FRCM) composites are increasingly adopted as a strengthening technique for existing masonry structures. Among the different fibers that can be employed in the reinforcing open-mesh textiles, which are embedded within cement- and lime-based matrices, glass fibers are gaining popularity due to their low price and promising performances observed so far. However, the stress redistribution between the glass fiber filaments within the textile is often uneven, which strongly affects the performance of the FRCM when subjected to external forces. In this paper, the stress redistribution between the glass fiber filaments is studied on the basis of tensile tests on a glass fiber textile left bare and impregnated with organic and inorganic matrices. The parameters studied are the fiber textile tensile strength and elastic modulus. Different systems, including the digital image correlation (DIC) technique, were employed to measure the specimen tensile strain. The results obtained shed light on the tensile strength of the glass textile, which is a key parameter in the design of glass FRCM strengthening.
5
Bellini, Alessandro, Andrea Incerti, and Claudio Mazzotti. "Out-of-Plane Strengthening of Masonry Walls with FRCM Composite Materials." Key Engineering Materials 747 (July 2017): 158–65. http://dx.doi.org/10.4028/www.scientific.net/kem.747.158.
Full textAbstract:
Structural strengthening by using composite materials proved to be one of the most suitable solutions for reinforcing masonry buildings. In this framework, the focus point of the presented experimental study is to evaluate the out-of-plane behaviour of masonry walls strengthened with Fiber Reinforced Cementitious Matrix (FRCM) composites when subjected to horizontal actions, by analyzing and discussing failure modes and their out-of-plane capacity. To this purpose, a new experimental set-up was developed, capable of applying an axial force and out-of-plane horizontal actions on full-scale masonry panels, placed in vertical position and subjected to a stress state similar to that present on a real masonry wall. Experimental results, obtained by using traditional and innovative techniques (such as Digital Image Correlation), will be compared with those coming from more conventional tensile and bond tests performed on FRCM coupons applied on masonry substrates, making use of simple theoretical models.
Dissertations / Theses on the topic "Fiber Reinforced Cementitious Matrix (FRCM), Digital Image Correlation (DIC), confinement, masonry"
1
Quartarone, Giovanni. "Confinement of masonry columns with Steel Fiber Reinforced Cementitious Matrix (S-FRCM) composites." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Find full textAbstract:
The rehabilitation of existing masonry elements through jacketing of columns using composite materials is becoming a remarkable technique in several applications that aim to increase the strength of existing masonry building.
An experimental campaign was conducted with Steel- and -Basalt Fiber Reinforced Cementitious Matrix (FRCM) systems, in order to test new products that might increase the advantages in terms of good adhesion to masonry substrate, breathability of the system, efficiency in aggressive environments, ease of installation and reversibility, which are essential for the preservation of historical buildings. The mean objective of this experimental study was to investigate the state of the improvement of square masonry columns, built in alternate stretcher and header bond configuration using as material confinement Steel- and-Basalt FRCM system, subjected to axial compression. Moreover, the effectiveness and influence of the confinement in terms of load-bearing capacity and strain distribution with respect to unconfined prisms was carried out. An optical technique, known as Digital Image Correlation (DIC), was employed to understand the interaction between the unit masonry components.
2
Zucchini, Lorenzo. "Experimental analysis of fiber reinforced cementitious matrix (FRCM) confined masonry columns." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/2667/.
Full textAbstract:
The increasing use of Fiber Reinforced methods for strengthening existing brick masonry walls and columns, especially for the rehabilitation of historical buildings, has generated considerable research interest in understanding the failure mechanism in such systems.
This dissertation is aimed to provide a basic understanding of the behavior of solid brick masonry walls unwrapped and wrapped with Fiber Reinforced Cementitious Matrix Composites. This is a new type of composite material, commonly known as FRCM, featuring a cementitious inorganic matrix (binder) instead of the more common epoxy one.
The influence of the FRCM-reinforcement on the load-carrying capacity and strain distribution during compression test will be investigated using a full-field optical technique known as Digital Image Correlation.
Compression test were carried on 6 clay bricks columns and on 7 clay brick walls in three different configuration, casted using bricks scaled respect the first one with a ratio 1:2, in order to determinate the effects of FRCM reinforcement.
The goal of the experimental program is to understand how the behavior of brick masonry will be improved by the FRCM-wrapping.
The results indicate that there is an arching action zone represented in the form of a parabola with a varying shape according to the used configuration. The area under the parabolas is considered as ineffectively confined.
The effectively confined area is assumed to occur within the region where the arching action had been fully developed.