Abstract
The behavior of masonry shear walls reinforced with pseudoelastic Ni–Ti shape memory alloy (SMA) strips and engineered cementitious composite (ECC) sheets is the main focus of this paper. The walls were subjected to quasi-static cyclic in-plane loads and evaluated by using Abaqus. Eight cases of strengthening of masonry walls were investigated. Three masonry walls were strengthened with different thicknesses of ECC sheets using epoxy as adhesion, three walls were reinforced with different thicknesses of Ni–Ti strips in a cross form bonded to both the surfaces of the wall, and one was utilized as a reference wall without any reinforcing element. The final concept was a hybrid of strengthening methods in which the Ni–Ti strips were embedded in ECC sheets. The effect of mesh density on analytical outcomes is also discussed. A parameterized analysis was conducted to examine the influence of various variables such as the thickness of the Ni–Ti strips and that of ECC sheets. The results show that using the ECC sheet in combination with pseudoelastic Ni–Ti SMA strips enhances the energy absorption capacity and stiffness of masonry walls, demonstrating its efficacy as a reinforcing method.
Highlights
Seismic activities can induce structural and non-structural damage both during and afterwards the event, which is mainly caused by perturbations in load-resisting elements of constructions, such as load-bearing walls and columns [1,2]
The behavior of masonry walls strengthened with engineered cementitious composite (ECC) sheets, Ni–Ti strips, and a hybrid combination of these two methods was examined under cyclic loadings
This research examines the numerical simulation of masonry walls reinforced with pseudoelastic Ni–Ti strips and ECC sheets that are exposed to cyclical lateral loading
Summary
Seismic activities can induce structural and non-structural damage both during and afterwards the event, which is mainly caused by perturbations in load-resisting elements of constructions, such as load-bearing walls and columns [1,2]. Because of its significant energy absorption capabilities, the recommended model with a 2% pre-strain SMA wire model exhibits the greatest decrease of the church’s transverse deformations and greatly reduces impact (from destruction to light damage level) in the case of major earthquakes. Another unique method for retrofitting URM structures is the use of ECC technology, which first appeared in the early 1990s. Singh and Munjal [35] used numerical simulation to conduct a parametric analysis of the out-of-plane performance of ECC-based URM walls with openings They discovered that the load-carrying capability of ECC-enhanced masonry walls with apertures is approximately six times that of the examined unstrengthened masonry walls. The research shows that it is beneficial to retrofit masonry structures with Ni–Ti strips and precast ECC sheets, as well as combining both technologies to improve the load-bearing capacity to withstand cyclic loads
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