Structural Response of Sandwich Beams with Different Facing Materials Subjected to Bending

2017 ◽  
Vol 21 ◽  
pp. 294-300
Author(s):  
Iuliana Dupir ◽  
Nicolae Ţăranu ◽  
Cristina Vlădoiu ◽  
Dragoş Ungureanu ◽  
Vlad Lupăşteanu
Keyword(s):  
Numerical Analysis ◽  
Structural Response ◽  
High Strength ◽  
Specific Weight ◽  
Foam Core ◽  
Sandwich Beams ◽  
Stress Distributions ◽  
Structural Functions ◽  
Strength And Stiffness ◽  
Lightweight Core

Sandwich elements with structural functions are widely used in engineering applications, offering outstanding advantages, such as high strength and stiffness compared to its low specific weight. The sandwich elements consist in two stiff and thin faces, separated by a thick and lightweight core. A numerical analysis is performed in this paper, in order to evaluate the flexural structural response of sandwich beams with foam core and various facing materials. It has been noticed that the deflections decrease when the stiffness of the facings increase. The results are represented in terms of maximum deflections and direct stress distributions.

scholarly journals Influence of Embedded through Section Connectors on the Behavior of a New Strengthening Technique for Concrete Structures

2016 ◽  
Vol 711 ◽  
pp. 996-1003
Author(s):  
Tiago Valente ◽  
Davide Colarusso ◽  
Marisa Pecce ◽  
Francesca Ceroni ◽  
Joaquim Barros
Keyword(s):  
Structural Response ◽  
High Strength ◽  
Thin Layers ◽  
Experimental Program ◽  
Infill Walls ◽  
Rc Structures ◽  
Strength And Stiffness ◽  
Ductile Behavior ◽  
Strengthening Technique ◽  
Rc Framed Structures

An innovative technique is being developed for the structural rehabilitation of Reinforced Concrete (RC) structures. In particular, the infill walls of RC framed structures are often identified as non-structural elements, but currently are considered with an important role in the structural behavior because they participate to the in-plane strength and stiffness of the frames and they can give very dangerous crashes out-of-plane. In this paper a strengthening technique aimed to repair infill walls is proposed. It is based on the application of outer thin layers of ultra-high ductile fiber reinforced mortar (UHDFRM) applied according to the shotcrete technique, including the use of embedded through section (ETS) connectors. This strengthening system can exhibit a high strength and ductile behavior, increase the load carrying capacity, energy absorption and dissipation capacities, and ultimately improve the structural response of RC structures when submitted to loading conditions typical of seismic events. An experimental program was outlined in order to assess the contribution of different types of ETS connectors on the behavior of the strengthening system. The experimental program comprised the performance of push-out tests on samples representative of the structural strengthening solution, namely low strength concrete samples. The experimental results are discussed in detail in order to highlight the effectiveness of the various types of ETS connectors tested.

scholarly journals Materials for Automotive Lightweighting

2019 ◽  
Vol 49 (1) ◽  
pp. 327-359 ◽  
Author(s):  
Alan Taub ◽  
Emmanuel De Moor ◽  
Alan Luo ◽  
David K. Matlock ◽  
John G. Speer ◽  
...  
Keyword(s):  
Galvanic Corrosion ◽  
Low Carbon Steel ◽  
High Strength Steels ◽  
High Strength ◽  
Low Carbon ◽  
New Materials ◽  
Specific Strength ◽  
Advanced High Strength Steels ◽  
Strength And Stiffness ◽  
The Cost

Reducing the weight of automobiles is a major contributor to increased fuel economy. The baseline materials for vehicle construction, low-carbon steel and cast iron, are being replaced by materials with higher specific strength and stiffness: advanced high-strength steels, aluminum, magnesium, and polymer composites. The key challenge is to reduce the cost of manufacturing structures with these new materials. Maximizing the weight reduction requires optimized designs utilizing multimaterials in various forms. This use of mixed materials presents additional challenges in joining and preventing galvanic corrosion.

Carbon Foam Core Composite Sandwich Beams: Flexure Response

2005 ◽  
Vol 39 (12) ◽  
pp. 1067-1080 ◽  
Author(s):  
M. D. Sarzynski ◽  
O. O. Ochoa
Keyword(s):  
Carbon Foam ◽  
Foam Core ◽  
Sandwich Beams ◽  
Composite Sandwich

An Introduction to the Impact Behaviour of Polymer Composites Using Simplified Beam Models

1998 ◽  
Vol 26 (2) ◽  
pp. 89-110 ◽  
Author(s):  
R. A. W. Mines
Keyword(s):  
Composite Materials ◽  
Undergraduate Students ◽  
Progressive Collapse ◽  
Structural Response ◽  
Sandwich Beams ◽  
Three Point Bending ◽  
The Past ◽  
Structural Case ◽  
The University ◽  
The Impact

The paper describes a final-year undergraduate course that has been taught at the University of Liverpool for the past three years. The main aims of the course are to introduce the student to the design of structures using multi-component (composite) materials and to the performance of such structures under impact loading. Given the complexity of generalized composite behaviour and of structural crashworthiness, a simple structural case is considered, namely, a beam subject to three-point bending. A feature of the course is that not only is linear structural response considered but also non-linear (progressive) structural collapse is covered. The course is split into four parts, namely: (i) analysis of composite laminae, (ii) analysis of laminated beams, (iii) local and global effects in sandwich beams, and (iv) post-failure and progressive collapse of sandwich beams. Static and impact loadings are considered. Comments are made on how the theories are simplified and communicated to the undergraduate students.

Numerical Analysis of Fire Behavior of a Large Space Pre-Stressed Steel Structure under Fire

2011 ◽  
Vol 71-78 ◽  
pp. 3729-3732
Author(s):  
Ming Zhou ◽  
Zhi Guo Xie ◽  
Xin Tang Wang
Keyword(s):  
Numerical Analysis ◽  
Fire Behavior ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Large Space ◽  
Fire Source ◽  
Lattice Shell ◽  
In Fire ◽  
Influence Degree

The computational model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed. The different space height and different rise-span ratio are considered for analysis of response temperature, displacements and stresses of the pre-stressed lattice shell under fire for one fire source. It is also shown that displacement of the node right above the inner cable is the maximum among the four nodes presented here as the fire source is located at the position right below the second-ring cable of the structure. It is concluded that the influence degree of space height of the structure on the fire response of the structure is not great, but rise-span ratio has obvious and great effect on displacements and stresses of the pre-stressed steel structure with large span in fire.

scholarly journals Numerical analysis on the shear behavior of single-keyed dry joints in precast high-strength concrete segmental bridges

2019 ◽  
Vol 16 (4) ◽  
pp. 3144-3168 ◽  
Author(s):  
Haibo Jiang ◽  
◽  
Shaodi Wang ◽  
Zhuangcheng Fang ◽  
Gongfa Chen ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
High Strength Concrete ◽  
High Strength ◽  
Shear Behavior ◽  
Strength Concrete ◽  
Segmental Bridges
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