DEVELOPING A TEST SYSTEM FOR EVALUATING STRUCTURAL PERFORMANCE OF MASONRY WALLS UNDER OUT-OF-PLANE UNIFORM LOADS

Numbers of residential houses were damaged in some areas caused by earthquakes. The damages greatly affected the number of losses. Most of the houses in some countries are made of brick unreinforced masonry (URM) walls. Improving the structural performance of this kind of masonry has become important. For this reason, experimental study was conducted on the flexural performance of brick walls retrofitted with strapping band (polypropylene/pp-band). The walls were constructed using bricks produced manually with joint mortar ratio of 1 PC: 6 sand, that chosen to represent the actual field conditions of the communities in Indonesia. The aims of the study were to determine the out of plane flexural performance of the non-retrofitted and retrofitted brick masonry walls under cyclic loading by using some variations of the distance between pp-band. The walls were loaded to produce flexural bending that caused vertical and horizontal cracks. The results of the test showed that the retrofitted walls failed by large deformation. After crack, the strength reduced to about 25-50% of the crack load and then regained progressively as residual strength until 150% higher than the strength at crack load by large deformation due to the strapping band mesh. The wall with 10 cm pp-band distance should be used as optimum solution for retrofitting

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In-plane and out-of-plane structural performance of fully grouted reinforced masonry walls with varying reinforcement ratio – A numerical study

Engineering Structures ◽

10.1016/j.engstruct.2021.113288 ◽

2021 ◽

Vol 248 ◽

pp. 113288

Author(s):

Sarkar Noor-E-Khuda ◽

David P Thambiratnam

Keyword(s):

Numerical Study ◽

Reinforcement Ratio ◽

Structural Performance ◽

Masonry Walls ◽

Reinforced Masonry ◽

Out Of Plane

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Modelling of the In-Plane and Out-of-Plane Performance of TRM-Strengthened Masonry Walls

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.747.60 ◽

2017 ◽

Vol 747 ◽

pp. 60-68 ◽

Cited By ~ 5

Author(s):

Gemma Mininno ◽

Bahman Ghiassi ◽

Daniel V. Oliveira

Keyword(s):

Numerical Models ◽

Failure Mechanisms ◽

Structural Performance ◽

Masonry Walls ◽

Nonlinear Behaviour ◽

Displacement Capacity ◽

Out Of Plane

Tensile Reinforced Mortars (TRMs) are promising composites that address the compatibility demands required for strengthening of masonry and historical constructions. Although many recent studies have been devoted to the use of these materials for strengthening purposes, several issues such as efficiency for improving the structural performance are clearly open. The aim of this paper is to numerically investigate the effectiveness of TRM systems on the in-plane and out-of-plane response of masonry walls. Numerical models are adopted to describe the nonlinear behaviour and the failure mechanisms of unreinforced and strengthened walls. It is shown that the implementation of TRM layers improve largely the performance of the masonry walls both in terms of strength and displacement capacity.

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Out-of-plane loaded masonry walls retrofitted with oriented strand boards: Numerical analysis and influencing parameters

Engineering Structures ◽

10.1016/j.engstruct.2021.112683 ◽

2021 ◽

Vol 243 ◽

pp. 112683

Author(s):

Jamiu A. Dauda ◽

Luis C. Silva ◽

Paulo B. Lourenço ◽

Ornella Iuorio

Keyword(s):

Numerical Analysis ◽

Masonry Walls ◽

Out Of Plane ◽

Influencing Parameters

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Out-of-plane local mechanism analysis with finite element method

Curved and Layered Structures ◽

10.1515/cls-2021-0012 ◽

2021 ◽

Vol 8 (1) ◽

pp. 130-136

Author(s):

Roberto Spagnuolo

Keyword(s):

Finite Element ◽

Masonry Walls ◽

Finite Element Models ◽

Mechanism Analysis ◽

Fem Method ◽

Local Mechanism ◽

Out Of Plane ◽

Smeared Crack ◽

The Stability ◽

No Tension Material

Abstract The stability check of masonry structures is a debated problem in Italy that poses serious problems for its extensive use. Indeed, the danger of out of plane collapse of masonry walls, which is one of the more challenging to evaluate, is traditionally addressed not using finite element models (FEM). The power of FEM is not properly used and some simplified method are preferred. In this paper the use of the thrust surface is suggested. This concept allows to to evaluate the eccentricity of the membrane stresses using the FEM method. For this purpose a sophisticated, layered, finite element with a no-tension material is used. To model a no-tension material we used the smeared crack method as it is not mesh-dependent and it is well known since the early ’80 in an ASCE Report [1]. The described element has been implemented by the author in the program Nòlian by Softing.

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