Out-of-plane bending of FRP-reinforced masonry walls

Gilstrap, Jeremy; Dolan, Charles W.

doi:10.1016/s0266-3538(98)00007-4

Cited by 72 publications

(27 citation statements)

References 2 publications

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“…The strengthening of existing masonry structures by means of externally bonded layers of composite materials is recognized as an advantageous solution for structural upgrade [Albert et al 2001;Hamilton and Dolan 2001;Griffith et al 2004;Gilstrap and Dolan 1998]. The demands for upgrade and strengthening mainly stem from the limited (if any) ability of the masonry construction to carry tensile stresses and the resulting vulnerability to dynamic out-of-plane loads.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of FRP strengthened unidirectional masonry walls, I: A multilayered finite element

Rabinovitch

Madah

2012

J. Mech. Mater. Struct.

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The dynamic response of unidirectional FRP strengthened masonry walls is investigated. The examined walls are strengthened using externally bonded composite materials. In this part of the paper, a nonlinear multilayered finite element for the nonlinear dynamic analysis of the unidirectional strengthened wall is developed. The formulation reduces the general 2D problem to a 1D form using high order kinematic assumptions that are based on the static deformation fields in the various components. The model aims to face the challenges associated with the combination of length scales, differences in elastic properties, irregular points, cracking, crushing, and inelastic behavior of the masonry substrate. The geometrical nonlinearity, the layered configuration, and the variation of the stresses through the depth the adhesive layers are also addressed. A numerical study that examines the capabilities of the model and its convergence with refinement of the spatial and temporal meshes is presented. Emphasis is placed on the global nonlinear dynamic response, the local effects near the joints, the interfacial stresses, and their temporal variation under dynamic loads.

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Section: Introductionmentioning

confidence: 99%

Dynamics of FRP strengthened unidirectional masonry walls, I: A multilayered finite element

Rabinovitch

Madah

2012

J. Mech. Mater. Struct.

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“…Many researchers have tried to evaluate the performance of retrofitted masonry using full-scale brick units with size of masonry panels ranging from 1070 to 1975 mm but it requires large size testing facilities and a large amount of research funds [10,18,19,38]. Structural tests of scaled models are also an alternative to understand the behavior of masonry wall system.…”

Section: Experimental Programmentioning

confidence: 99%

“…Some of the retrofitting methods include the seismic retrofit of URM walls using externally-bonded or near surface mounted Fiber Reinforced Polymer (FRP) laminates, bars and fabrics. Experiments on various patterns and layouts of FRP have validated that FRP can significantly increase in-plane and out-of-plane strength of URM walls [7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Higher strength to weight ratio, ease of application and corrosion resistance are some of well-known advantages of FRP retrofitting technique over conventional retrofitting methods.…”

Section: Introductionmentioning

confidence: 99%

Fiber Reinforced Polymer and Polypropylene Composite Retrofitting Technique for Masonry Structures

et al. 2015

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In the current research work, an attempt is made to increase the seismic capacity of unreinforced masonry (URM) structures by proposing a new composite material which can improve shear strength and deformation capacity of URM wall systems. Fiber Reinforced Polymer (FRP) having high tensile and shear stiffness can significantly increase in-plane and out-of-plane strength of masonry walls, but, inherently, FRP strengthened wall systems exhibit brittle failure under extreme seismic loading. Polypropylene (PP-band) is a low cost material with sufficient ductility and deformation capacity. Keeping in view the behavior of FRP and PP-band, a composite of FRP and PP-band is proposed for retrofitting of URM walls. Mechanical behavior of the proposed composite material is assessed by carrying out an in-plane diagonal compression test and an out-of-plane bending test on twenty-five 1/4-scaled masonry wall panels. Experimental plan for each panel, URM, PP-band retrofitted, FRP retrofitted and FRP + PP-band retrofitted masonry, is diagonal compression test and three-point bending test. Experimental results have determined that FRP + PP-band composite increased, not only the initial peak strength, but also the ductility, deformation capacity and residual strength of URM wall systems. OPEN ACCESSPolymers 2015, 7 964

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“…The use of externally bonded composites is an excellent solution for this need [Albert et al 2001;Hamilton and Dolan 2001;Griffith et al 2004;Gilstrap and Dolan 1998]. The addition of a strong, stiff, lightweight, and durable externally bonded tensile resisting layer provides 30 ODED RABINOVITCH AND HAZEM MADAH the wall with a supplemental load resisting mechanism and with the ability to resist out-of-plane loads through flexure.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of a strong, stiff, lightweight, and durable externally bonded tensile resisting layer provides 30 ODED RABINOVITCH AND HAZEM MADAH the wall with a supplemental load resisting mechanism and with the ability to resist out-of-plane loads through flexure. This ability was demonstrated in various experimental programs that examined the static out-of-plane response of the strengthened wall [Albert et al 2001;Hamilton and Dolan 2001;Griffith et al 2004;Gilstrap and Dolan 1998;Hamed and Rabinovitch 2010a;Hamed and Rabinovitch 2010b]. The more important challenge is, however, to examine, characterize, and demonstrate the response of the strengthened wall to dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of FRP strengthened unidirectional masonry walls, II: Experiments and comparison

Rabinovitch

Madah

2012

J. Mech. Mater. Struct.

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In this part of the paper, the dynamic out-of-plane behavior of a unidirectional strengthened masonry wall is studied experimentally. The experimental phase focuses on shake-table testing of a full-scale masonry wall strengthened with carbon fiber reinforced composite strips. The tested wall is subjected to different combinations of in-plane compression and out-of-plane excitation. The dynamic behavior of the wall is monitored with emphasis on the global out-of-plane displacements and accelerations as well as on the localized displacements and strains near the mortar joints. The experimental results are also used for the assessment of the finite element model developed in part I of the paper. The experimental results, the numerical analysis, and the comparison between the two throw light on the global and local aspects of the dynamic response. The numerical model allows for further study of local-scale results, which cannot be monitored experimentally. In particular, the dynamics of the shear and peeling stresses at the adhesive layers are examined. The comparison of the experimental results with ones obtained for the same wall before strengthening demonstrate the potential of the method and its impact on the dynamics of the masonry wall.

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Out-of-plane bending of FRP-reinforced masonry walls

Cited by 72 publications

References 2 publications

Dynamics of FRP strengthened unidirectional masonry walls, I: A multilayered finite element

Dynamics of FRP strengthened unidirectional masonry walls, I: A multilayered finite element

Fiber Reinforced Polymer and Polypropylene Composite Retrofitting Technique for Masonry Structures

Dynamics of FRP strengthened unidirectional masonry walls, II: Experiments and comparison

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