Mechanical behavior and composite action of two-wythe precast concrete sandwich beams via chemically hybridized intermediate layer

2020 ◽  
Vol 236 ◽  
pp. 111903
Author(s):  
Thomas L. Attard ◽  
Mahmoodreza Soltani
Keyword(s):  
Mechanical Behavior ◽  
Intermediate Layer ◽  
Precast Concrete ◽  
Sandwich Beams ◽  
Composite Action

Effective Mechanical Behavior of Sandwich Beams under Uncoupled Bending and Torsion Loadings

2014 ◽  
Vol 590 ◽  
pp. 58-62 ◽  
Author(s):  
Hugo Miguel Silva ◽  
José Filipe Bizarro de Meireles
Keyword(s):  
Mechanical Behavior ◽  
Design Optimization ◽  
Sandwich Panels ◽  
Sandwich Beams ◽  
Honeycomb Core ◽  
Low Intensity ◽  
Specific Stiffness ◽  
Low Weight ◽  
Structural Applications ◽  
Non Linear

Sandwich geometries, mainly panels and beams are widely used in several transportation industries, namely aerospace, aeronautic and automotive. Sandwich geometries are known for their advantages in structural applications: high specific stiffness, low weight, and possibility of design optimization prior to manufacturing. This study aims to know the influence of the number of reinforcements (ribs), and of the thickness on the mechanical behavior of sandwich panels subjected to bending and torsion loads separately. In this study, 3 geometries are compared: simple web-core beam, corrugated core, and honeycomb core. The last 2 are asymmetric, due to the use of odd number of ribs. The influence of the geometry on the results is discussed, by means of a parameter that establishes a relation between the stiffness behavior and the mass of the object. It is shown that the all relations are non-linear, despite the elastic nature of the analysis, by means of the application of loads with low intensity.

Experimental Investigation of Failure Modes for Sandwich Beams

2017 ◽  
Vol 754 ◽  
pp. 115-118 ◽  
Author(s):  
Liviu Marșavina ◽  
Dan Andrei Şerban ◽  
Camelia Pop ◽  
Radu Negru
Keyword(s):  
Experimental Investigation ◽  
Aluminum Alloy ◽  
Mechanical Behavior ◽  
Failure Modes ◽  
Polyurethane Foams ◽  
Shear Stresses ◽  
Sandwich Beams ◽  
Three Point Bending ◽  
Rigid Polyurethane Foams

In this paper, the mechanical behavior in three-point bending was investigated for four different sandwich beams composed of aluminum alloy 1050 H24 faces and Necuron rigid polyurethane foams. The tests were conducted according to the recommendations of ASTM C393-00. Three different failure modes were observed (yielding of faces, face and core indentation and shear of core), being in accordance with the modes deducted from the calculated values of bending and shear stresses.

Influence of reinforcement arrangement details on mechanical behavior of precast concrete barrier with loop connection

Structures ◽  
2020 ◽  
Vol 27 ◽  
pp. 1682-1692
Author(s):  
S. Basit ◽  
T. Maki ◽  
H. Mutsuyoshi ◽  
Y. Ishihara ◽  
H. Tajima
Keyword(s):  
Mechanical Behavior ◽  
Precast Concrete ◽  
Concrete Barrier

Structural performance and section optimization of precast concrete sandwich panels with pin-type GFRP connectors

2021 ◽  
pp. 136943322199976
Author(s):  
Jun-Qi Huang ◽  
Qing Jiang ◽  
Xun Chong ◽  
Chao-Liang Zhao ◽  
Zi-Yang Wang
Keyword(s):  
Precast Concrete ◽  
Shear Capacity ◽  
Structural Performance ◽  
Composite Action ◽  
Pull Out ◽  
Loading Direction ◽  
Section Type ◽  
Precast Concrete Sandwich Panel ◽  
Direct Tensile ◽  
Direct Tensile Test

A precast concrete sandwich panel (PCSP) offers a good potential in the application of façade wall due to the improved energy efficiency. In this study, the structural performance of PCSP with pin-type glass fiber reinforced polymer (GFRP) connectors was investigated, and an optimization characterized by ribbed structural wythe was proposed and studied. Firstly, the pull-out and shear capacity of the pin-type connector were evaluated through direct tensile test and direct shear test, respectively. Thereafter, seven PCSP specimens were fabricated and tested under four points flexural load. The investigating parameters included the structural wythe thickness, loading direction, insulation bond, and section type of the structural wythe. The load-deflection relationship, crack pattern, failure mode, load-strain relationship, and degree of composite action of the PCSP were studied and compared. It was concluded that: (1) the tested PCSPs presented ductile failures; (2) the structural wythe thickness, loading direction and insulation bond would influence the cracking, yielding, and peak loads of the tested PCSP; (3) the PCSP with pin-type GFRP connectors could be designed as non-composite type owing to the low composite action; and (4) the proposed ribbed structural wythe could achieve a lightweight PCSP while considerable flexural stiffness and capacity could be retained.

Effective Stiffness Behaviour of Sandwich Beams under Uncoupled Bending and Torsion Loadings

2016 ◽  
Vol 852 ◽  
pp. 469-475 ◽  
Author(s):  
Hugo Miguel Silva ◽  
José Filipe Meireles
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Design Optimization ◽  
Sandwich Panels ◽  
Effective Stiffness ◽  
Sandwich Beams ◽  
Finite Element Software ◽  
Specific Stiffness ◽  
Low Weight ◽  
Structural Applications

Sandwich geometries, mainly in the form of panels and beams, are commonly applied in various transportation industries, such as aerospace, aeronautic and automotive. Sandwich geometries represent important advantages in structural applications, namely high specific stiffness, low weight, and possibility of design optimization prior to manufacturing. The aim of this paper is to uncover the influence of the number of reinforcements (ribs), and of the thickness on the mechanical behavior of all-metal sandwich panels subjected to uncoupled bending and torsion loadings. In this study, four geometries are compared. The orientation of the reinforcements and the effect of transversal ribs are also considered in this study. It is shown that the all the relations are non-linear, despite the elastic nature of the analysis in the Finite Element software ANSYS MECHANICAL APDL.

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