Influence of Masonry Infills on the Shear Forces of RC Framed Structures

2016 ◽  
Vol 847 ◽  
pp. 361-368 ◽  
Author(s):  
Daniele Perrone ◽  
Vincenzo Saponaro ◽  
Marianovella Leone ◽  
Maria Antonietta Aiello
Keyword(s):  
Mechanical Properties ◽  
Young Modulus ◽  
Shear Forces ◽  
Seismic Behaviour ◽  
Masonry Infills ◽  
Rc Frames ◽  
Infill Panels ◽  
Rc Framed Structures ◽  
Global And Local ◽  
Modelling Approach

The damages observed during the earthquakes occurred in the last decades have clearly shown as the influence of infill panels on the seismic behaviour of Reinforced Concrete (RC) buildings should be taken into account; the global stiffness and the strength of the RC frames are significantly modified by the infills. In the present study the influence of infills in terms of shear forces has been analyzed by means of linear static analysis; a parametric study has been carried out to evaluate the behavior of infilled frames varying both modelling approach and the mechanical properties of the masonry infills. In terms of modelling approach the single and multi-strut models have been adopted; the Young modulus of masonry infills have been varied in the common range proposed in literature. The results show that multi-strut approach is able to predict both global and local behavior. In addition, the importance of the mechanical properties of masonry infills in the evaluation of the elastic period and shear force in the columns is underlined.

Effet des murs de remplissage en maçonnerie sur la période de vibration des portiques

1991 ◽  
Vol 18 (2) ◽  
pp. 264-272
Author(s):  
Taoufik Elouali ◽  
Jules Houde ◽  
René Tinawi
Keyword(s):  
Dynamic Analysis ◽  
Load Resistance ◽  
Frame Structures ◽  
Seismic Load ◽  
Analysis Program ◽  
Seismic Behaviour ◽  
Natural Period ◽  
Masonry Infills ◽  
Infill Panels ◽  
Analytical Expressions

This paper examines the influence of masonry infill panels on the natural period of vibration of multi-storey frames in relation to seismic load resistance. Simple analytical expressions are presented to evaluate the natural period of these types of structures with varying number of bays and stories. Results obtained with the proposed formulae were found to correlate well with numerical values obtained from a dynamic analysis program. Key words: masonry infills, seismic behaviour, natural periods, frame structures.

scholarly journals Double-Leaf Infill Masonry Walls Cyclic In-Plane Behaviour: Experimental and Numerical Investigation

2018 ◽  
Vol 12 (1) ◽  
pp. 35-48 ◽  
Author(s):  
André Furtado ◽  
Hugo Rodrigues ◽  
António Arêde ◽  
Humberto Varum
Keyword(s):  
Reinforced Concrete ◽  
Masonry Wall ◽  
Masonry Walls ◽  
Initial Stiffness ◽  
Seismic Behaviour ◽  
Infill Panels ◽  
Modelling Strategies ◽  
Infill Masonry ◽  
The Individual ◽  
Modelling Approach

Background: The infill masonry walls are widely used in the construction of reinforced concrete buildings for different reasons (partition, thermal and acoustic demands). Since the ‘60s decade, one of the most common typology in the southern Europe was the double-leaf infill walls. Recent earthquake events proved that this specific typology have an important role in the seismic response of reinforced concrete structures in terms of stiffness, strength and failure mechanisms. However, modelling approaches of these specific infill panels cannot be found over the literature. Objective: Due to this, the major goal of the present manuscript is to present a simplified modelling strategy to simulate the double-leaf infill masonry walls seismic behaviour in the software OpenSees. Method: For this, two different modelling strategies were proposed, namely through a global and an individual modelling of the panels. An equivalent double-strut model was assumed and both strategies were compared and calibrated with experimental results from a full-scale in-plane test of a double-leaf infill masonry wall. Results: The numerical results obtained by each strategy are very accurate in terms of prediction of the specimen’ initial stiffness, maximum strength and strength degradation. Conclusion: From the force evolution throughout the tests, it was observed differences lower than 10%. Globally, the individual modelling approach reached better results.

Design and seismic behaviour of taller eccentrically braced frames

2010 ◽  
Vol 37 (2) ◽  
pp. 195-208 ◽  
Author(s):  
Sanda Koboevic ◽  
Simona Olivia David
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Control Design ◽  
Design Criteria ◽  
Braced Frames ◽  
Local Response ◽  
Shear Forces ◽  
Seismic Behaviour ◽  
Eccentrically Braced Frames ◽  
Global And Local

This paper describes a study of the seismic behaviour of taller eccentrically braced frames (EBFs). Chevron-type EBFs with shear-critical links are designed for 14-, 20-, and 25-storey buildings in Montreal and Vancouver. For each location the importance of different design criteria is discussed and an appropriate design sequence is proposed. It was found that ductility requirements did not control design. For Vancouver, buildings member selection was mostly influenced by the inelastic inter-storey drift requirements whereas for Montreal ensuring the global frame stability was critical. The seismic response of these frames to the sets of earthquake records calibrated to match design spectra is described. The seismic performance for Vancouver frames was found to be adequate, except that in the upper storeys the inelastic link deformations and shear forces exceeded values anticipated in design. For the Montreal structures, all global and local response indicators remained well below the design limits.

scholarly journals Tailoring a Low Young Modulus for a Beta Titanium Alloy by Combining Severe Plastic Deformation with Solution Treatment

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3467
Author(s):  
Anna Nocivin ◽  
Doina Raducanu ◽  
Bogdan Vasile ◽  
Corneliu Trisca-Rusu ◽  
Elisabeta Mirela Cojocaru ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Solution Treatment ◽  
Young Modulus ◽  
Orthopedic Implants ◽  
Beta Titanium Alloy

The present paper analyzed the microstructural characteristics and the mechanical properties of a Ti–Nb–Zr–Fe–O alloy of β-Ti type obtained by combining severe plastic deformation (SPD), for which the total reduction was of etot = 90%, with two variants of super-transus solution treatment (ST). The objective was to obtain a low Young’s modulus with sufficient high strength in purpose to use the alloy as a biomaterial for orthopedic implants. The microstructure analysis was conducted through X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) investigations. The analyzed mechanical properties reveal promising values for yield strength (YS) and ultimate tensile strength (UTS) of about 770 and 1100 MPa, respectively, with a low value of Young’s modulus of about 48–49 GPa. The conclusion is that satisfactory mechanical properties for this type of alloy can be obtained if considering a proper combination of SPD + ST parameters and a suitable content of β-stabilizing alloying elements, especially the Zr/Nb ratio.

scholarly journals The impact of molded pulp product process on the mechanical properties of molded Bleached Chemi-Thermo-Mechanical Pulp

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Claire Dislaire ◽  
Yves Grohens ◽  
Bastien Seantier ◽  
Marion Muzy
Keyword(s):  
Mechanical Properties ◽  
Water Uptake ◽  
Process Parameters ◽  
Manufacturing Process ◽  
Water Immersion ◽  
Young Modulus ◽  
Drying Time ◽  
Mechanical Pulp ◽  
Hygroscopic Properties ◽  
The Impact

AbstractThis study was carried out using bleached softwood Chemi-Thermo-Mechanical Pulp to evaluate the influence of Molded Pulp Products’ manufacturing process parameters on the finished products’ mechanical and hygroscopic properties. A Taguchi table was done to make 8 tests with specific process parameters such as moulds temperature, pulping time, drying time, and pressing time. The results of these tests were used to obtain an optimized manufacturing process with improved mechanical properties and a lower water uptake after sorption analysis and water immersion. The optimized process parameters allowed us to improve the Young’ Modulus after 30h immersion of 58% and a water uptake reduction of 78% with the first 8 tests done.

STUDYING THE PHYSICAL AND MECHANICAL PROPERTIES OF BUCKWHEAT WITH THE HELP OF INSTALLING A LINEAR PLANE SHEAR

2020 ◽  
Author(s):  
S.V Vladimirov ◽  
◽  
V.G. Korniychuk
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Shear Forces ◽  
Plane Shear ◽  
Preliminary Results

The design of the device for determining the shear forces of the buckwheat groats layer is considered, preliminary results of an experiment on the study of the shear forces of the buckwheat groats in the laboratory are presented.

Influence of spinodal decomposition and fcc→w phase transformation on global and local mechanical properties of nanolamellar CVD fcc-Ti1-xAlxN coatings

Materialia ◽  
2020 ◽  
Vol 11 ◽  
pp. 100696
Author(s):  
Michael Tkadletz ◽  
Alexandra Lechner ◽  
Nina Schalk ◽  
Bernhard Sartory ◽  
Andreas Stark ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Spinodal Decomposition ◽  
Global And Local

Some Physical Properties of Kola Nuts – A Response Surface Approach

2014 ◽  
Vol 28 (2) ◽  
pp. 251-255 ◽  
Author(s):  
Rahman Akinoso ◽  
Ademola K. Aremu ◽  
Ismail S. Balogun
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Response Surface ◽  
Physical And Mechanical Properties ◽  
Young Modulus ◽  
Moisture Loss ◽  
Surface Approach ◽  
Drying Temperature ◽  
Peak Energy ◽  
Level Of Significance

Abstract This work studied the effect of drying temperature and duration on some physical and mechanical properties of two varieties of kola nuts using a response surface methodology approach. Physical properties determined were length, breadth, thickness, sphericity, aspect ratio, colour and moisture loss, while mechanical properties were force at break, yield, and peak, deformation at break and peak, energy to peak, energy to break, and yield, and Young modulus. At 5% level of significance, only mass, moisture loss, and sphericity were the physical properties affected. However, all measured mechanical properties were affected by drying temperature and duration (p<0.05).

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