Strengthening of Masonry Structures with FRP Composites

2001 ◽  
Author(s):  
J. Gustavo Tumialan ◽  
Francesco Micelli ◽  
Antonio Nanni
Keyword(s):  
Masonry Structures ◽  
Frp Composites

scholarly journals Case studies on strengthening of concrete and masonry structures

Alternativas ◽  
2017 ◽  
Vol 17 (3) ◽  
pp. 198-206 ◽  
Author(s):  
Antonio Nanni ◽  
Andrea Prota
Keyword(s):  
United States ◽  
Case Studies ◽  
The United States ◽  
Building Codes ◽  
Fiber Reinforced Polymer ◽  
Masonry Structures ◽  
Cementitious Matrix ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Italian City

This paper presents a number of case studies related to the strengthening of concrete and masonry structures damaged by the April 6, 2009, Mw 6.3 earthquake that struck the Italian city of L’Aquila and surrounding localities. After a brief overview of the existing challenges in buildings constructed prior to 1972 when the first building code addressing seismic construction was enacted in Italy, the paper describes interventions using technologies that can be considered innovative in that they are not addressed in the majority of the current building codes worldwide. The following strengthening methods are described: a) fiber-reinforced polymer (FRP) composites in the forms of manual lay-up, procured laminates and spikes; b) steel-reinforced polymer (SRP) lay-up and spikes; and, c) fabricreinforced cementitious matrix (FRCM). The paper concludes with a description of how the deployment of innovation for construction takes place in the United States. This example is intended to identify challenges to innovation and a possible method to overcome them.

scholarly journals Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Jin-Ben Gu ◽  
Yi Tao ◽  
Ren Xin ◽  
Z. Yang ◽  
Qing-Xuan Shi
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Masonry Wall ◽  
Masonry Structure ◽  
Shear Capacity ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Frp Composites ◽  
Energy Dissipation Capacity

FRP composites have been used for strengthening RC and masonry structures for decades. However, the researches on repairing multistorey masonry structures using FRP grids were relative less. In the present paper, an experimental study on the seismic performance of multistorey masonry structure with openings repaired with CFRP grid is introduced. Specifically, a 1/3-scale three-floor masonry wall with window openings was tested under quasistatic action to simulate the seismic damages. The damaged masonry wall was then repaired by externally bonding CFRP grids to the areas where the cracks intensively occurred. The repaired masonry wall was retested under the same loading to investigate the seismic resistance and assess the recovery attributed from the CFRP grid repairing. The findings of this study showed that CFRP grid repairing could effectively postpone or even prevent the occurrence and development of cracking. The seismic resistance of the masonry, including shear capacity, energy dissipation capacity, deformability, stiffness degradation, and ductility, was restored. The application of CFRP grid may shift the failure mechanism of the multistorey masonry wall. The recommendation of repair scheme for the similar structures was also proposed in accordance with the findings of the present work.

scholarly journals Experimental Study on the Out-of-Plane Behavior of Brick Masonry Walls Strengthened with Mortar and Wire Mesh: A Pioneer Study

2021 ◽  
Vol 6 (11) ◽  
pp. 165
Author(s):  
Panuwat Joyklad ◽  
Nazam Ali ◽  
Salvatore Verre ◽  
Hassan M. Magbool ◽  
Amr Elnemr ◽  
...  
Keyword(s):  
Developing Countries ◽  
Low Cost ◽  
Structural Response ◽  
Masonry Wall ◽  
Absorption Capacity ◽  
Wire Mesh ◽  
Masonry Walls ◽  
Masonry Structures ◽  
Flexural Capacity ◽  
Frp Composites

In the past, fiber-reinforced polymer (FRP) composites have been extensively used to modify the structural response of masonry brick walls. The promising advantages of FRP composites are easy application, lightweight, and very high tensile strength. However, FRP composites are very expensive, and their availability is an issue, especially in developing countries. The use of bricks is widespread in developing countries due to their low price and easy availability. Recent earthquakes and research results have demonstrated the vulnerability of existing masonry structures. In this study, we aimed to investigate the use of low-cost and readily available strengthening materials, i.e., cement-sand mortar and wire mesh, to enhance the flexural capacity of cement-clay interlocking brick (CCIB) masonry walls. The proposed strengthening materials were applied in different configurations and thicknesses. The experimental results indicated that using CS mortar and wire mesh is promising to enhance the flexural capacity of CCIB masonry walls. The flexural capacity and energy absorption capacity of the CCIB masonry wall (strengthened with 20 mm thick CS mortar and three layers of wire mesh) were 87% and 46% higher than the reference CCIB masonry wall. The results of this study can be used to improve the performance of masonry structures against earthquakes in the developing regions.

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