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

2017 ◽  
Vol 747 ◽  
pp. 60-68 ◽  
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.

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

2013 ◽  
Vol 19 (42) ◽  
pp. 591-594 ◽  
Author(s):  
Yulia HAYATI ◽  
Yasushi SANADA ◽  
So KASAHARA ◽  
Takuya TOMONAGA
Keyword(s):  
Test System ◽  
Structural Performance ◽  
Masonry Walls ◽  
Out Of Plane

Experimental Investigation on the Flexural Performance of Brick Masonry Wall Retrofitted Using PP-Band Meshes under Cyclic Loading

2016 ◽  
Vol 845 ◽  
pp. 175-180 ◽  
Author(s):  
Andreas Triwiyono ◽  
Frederica Neo ◽  
Johan Ardianto ◽  
Gumbert Maylda Pratama ◽  
Andreas Sugijopranoto
Keyword(s):  
Cyclic Loading ◽  
Large Deformation ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Structural Performance ◽  
Masonry Walls ◽  
Flexural Performance ◽  
Out Of Plane ◽  
Actual Field ◽  
Optimum Solution

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

scholarly journals Development of Detailed FE Numerical Models for Assessing the Replacement of Metal with Composite Materials Applied to an Executive Aircraft Wing

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 178
Author(s):  
Valerio Acanfora ◽  
Roberto Petillo ◽  
Salvatore Incognito ◽  
Gerardo Mario Mirra ◽  
Aniello Riccio
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Numerical Model ◽  
Numerical Models ◽  
Structural Performance ◽  
Aircraft Wing ◽  
Resin Infusion ◽  
Effectiveness Analysis ◽  
Liquid Resin Infusion ◽  
Process Constraints

This work provides a feasibility and effectiveness analysis, through numerical investigation, of metal replacement of primary components with composite material for an executive aircraft wing. In particular, benefits and disadvantages of replacing metal, usually adopted to manufacture this structural component, with composite material are explored. To accomplish this task, a detailed FEM numerical model of the composite aircraft wing was deployed by taking into account process constraints related to Liquid Resin Infusion, which was selected as the preferred manufacturing technique to fabricate the wing. We obtained a geometric and material layup definition for the CFRP components of the wing, which demonstrated that the replacement of the metal elements with composite materials did not affect the structural performance and can guarantee a substantial advantage for the structure in terms of weight reduction when compared to the equivalent metallic configuration, even for existing executive wing configurations.

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

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

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

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.

scholarly journals Out-of-plane reinforcement of masonry walls using joint-embedded steel cables

2020 ◽  
Vol 18 (10) ◽  
pp. 4755-4782
Author(s):  
Marco Corradi ◽  
Emanuela Speranzini ◽  
Giordano Bisciotti
Keyword(s):  
Masonry Walls ◽  
Out Of Plane ◽  
Steel Cables

Seismic Risk Mitigation of Historical Masonry Towers by Means of Prestressing Devices

2010 ◽  
Vol 133-134 ◽  
pp. 843-848 ◽  
Author(s):  
Adolfo Preciado Quiroz ◽  
Silvio T. Sperbeck ◽  
Harald Budelmann ◽  
Gianni Bartoli ◽  
Elham Bazrafshan
Keyword(s):  
Seismic Risk ◽  
Seismic Vulnerability ◽  
Risk Mitigation ◽  
Numerical Models ◽  
Failure Mechanisms ◽  
Masonry Towers ◽  
Seismic Risk Mitigation ◽  
Historical Masonry ◽  
Observed Damage ◽  
And Behavior

This work presents the investigation of the efficiency of different prestressing devices as a rehabilitation measure for the seismic risk mitigation of historical masonry towers. As a first phase, the seismic vulnerability of theoretical masonry towers was assessed by means of numerical models validated with information from the literature, observed damage and behavior of these structures due to passed earthquakes (crack pattern and failure mechanisms), and mainly taking into account the engineering experience. Afterwards, the validated models were rehabilitated with different prestressing devices; analyzing the results and concluding which device or the combination of them improved in a better way the seismic performance of the masonry towers. Finally, the methodology will be applied in two historical masonry towers located in seismic areas; the medieval tower “Torre Grossa” of San Gimignano, Italy, and one of the bell towers of the Cathedral of Colima, Mexico.

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