scholarly journals Structural behaviour and design rules of confined masonry walls: Review and proposals

2019 ◽  
Vol 217 ◽  
pp. 137-155 ◽  
Author(s):  
Rui Marques ◽  
Paulo B. Lourenço
Keyword(s):  
Masonry Walls ◽  
Structural Behaviour ◽  
Design Rules ◽  
Confined Masonry

scholarly journals Seismic Design of Masonry Buildings Some Gaps in Structural Eurocodes and their Correction by Codes CR 6 -2013 and P 100-1/2013

2016 ◽  
Vol 12 (1) ◽  
pp. 36-46
Author(s):  
Radu Petrovici
Keyword(s):  
Seismic Design ◽  
Shear Loading ◽  
Masonry Walls ◽  
List Type ◽  
Structural Elements ◽  
Practical Application ◽  
Safety Factors ◽  
Design Rules ◽  
Confined Masonry ◽  
Partial Safety Factors

Abstract Experience of designing buildings with structural masonry walls and masonry non-structural elements using Codes CR 6-2006 [15a] and P 100-1/2006 [16a], that were developed based on design principles and rules of Eurocodes adopted in Romania SR EN 1996-1-1[13] and SR EN 1998-1[14], revealed the need of some additions and corrections of texts. These interventions made by developing Codes CR 6 -2013[15] and P 100-1/2013[16], which we can characterize synthetically as follows: - Are aligned with the Structural Eurocodes principles but correcting some identified deficiencies. - Resume some previous provisions of national regulations that lack in Eurocodes - Introduce the results of recent theoretical and experimental research - Provide practical application rules, simple and explicit, accompanied by “Commentary” and “Design examples” The communication exposes and justifies synthetically the following new approaches introduced in the 2013 editions of the two regulations: Modification of the methodology for the partial safety factors (γM) and for establishing the minimum necessary strength values of masonry. Additions and explanations of the design rules for unreinforced and confined masonry subjected to combined axial compression and flexure and to shear loading.

In-plane response of unreinforced masonry walls confined by reinforced concrete tie-columns and tie-beams

2017 ◽  
Vol 20 (11) ◽  
pp. 1632-1643 ◽  
Author(s):  
Masoud Amouzadeh Tabrizi ◽  
Masoud Soltani
Keyword(s):  
Numerical Study ◽  
Nonlinear Behavior ◽  
Numerical Approach ◽  
Masonry Wall ◽  
Masonry Walls ◽  
Lateral Loads ◽  
Confined Masonry ◽  
Smeared Crack ◽  
Modeling Strategy ◽  
Reversed Cyclic

This article focuses on the experimental and analytical investigations of masonry walls surrounded by tie-elements under in-plane loads. The experimental results of an unconfined and a confined masonry wall, tested under reversed cyclic lateral loads, are presented. For numerical study, a micro-modeling strategy, using smeared-crack-based approach, is adopted. In order to validate the numerical approach, experimental test results and data obtained from the literature are used, and through a systematic parametric study, the influence of adjoining walls and number of tie-columns on the seismic behavior of confined masonry panels is numerically assessed and a simple but rational method for predicting the nonlinear behavior of these structures is proposed.

Out-of-Plane Design Procedure for Confined Masonry Walls

2016 ◽  
Vol 142 (2) ◽  
pp. 04015126 ◽  
Author(s):  
Joel Moreno-Herrera ◽  
Jorge Varela-Rivera ◽  
Luis Fernandez-Baqueiro
Keyword(s):  
Design Procedure ◽  
Masonry Walls ◽  
Confined Masonry ◽  
Out Of Plane

Out-of-plane behavior of confined masonry walls with aspect ratios greater than one

2021 ◽  
Vol 48 (1) ◽  
pp. 89-97
Author(s):  
Jorge Varela-Rivera ◽  
Joel Moreno-Herrera ◽  
Luis Fernandez-Baqueiro ◽  
Juan Cacep-Rodriguez ◽  
Cesar Freyre-Pinto
Keyword(s):  
Experimental Study ◽  
Aspect Ratio ◽  
Compressive Stress ◽  
Masonry Walls ◽  
Confined Masonry ◽  
Aspect Ratios ◽  
Out Of Plane ◽  
Axial Compressive Stress ◽  
Compressive Strut ◽  
Failure Line

An experimental study on the out-of-plane behavior of confined masonry walls is presented. Four confined walls with aspect ratios greater than one were tested in the laboratory. Walls were subjected to combined axial and out-of-plane uniform loads. The variables studied were the aspect ratio and the axial compressive stress of walls. It was observed that the out-of-plane strength of walls increased as the aspect ratio or the axial compressive stress increased. Failure of walls was associated with crushing of masonry. Analytical out-of-plane strength of walls was determined using the yielding line, failure line, modified yielding line, compressive strut and bidirectional strut methods. It was concluded that the experimental out-of-plane strength of walls was best predicted with the bidirectional strut method.

scholarly journals Experimental Study on Seismic Strengthening of Confined Masonry Walls Using RPC

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Xin Wang ◽  
Shuming Li ◽  
Zhenli Wu ◽  
Fanyang Bu ◽  
Fei Wang
Keyword(s):  
Seismic Retrofitting ◽  
Masonry Walls ◽  
Confined Masonry ◽  
Aspect Ratios ◽  
Lateral Strength ◽  
Cracking Pattern ◽  
Strengthening Technique ◽  
Reactive Powder ◽  
Effective Reinforcement ◽  
Masonry Units

Masonry structures without effective reinforcement are vulnerable to seismic excitation. An innovative strengthening technique was proposed for damaged and undamaged masonry walls. Six confined masonry units with two aspect ratios were tested under in-plane lateral cyclic loading, which consisted of two control walls, two original walls strengthened with reactive powder concrete (RPC-1), and two damaged walls repaired with RPC (RPC-2). The results of the specimens retrofitted with RPC demonstrated that the proposed technique significantly enhanced the seismic performance of masonry walls in terms of lateral strength, ductility, and energy dissipation. Furthermore, the two repaired specimens had a better distributed cracking pattern than the two strengthened specimens. The analysis of the results leads to a better understanding of the effect and mechanism of RPC seismic retrofitting for confined masonry walls.

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