Parametric Studies and Preliminary Design Recommendations on the Use of Postinstalled Shear Connectors for Strengthening Noncomposite Steel Bridges

2012 ◽  
Vol 17 (2) ◽  
pp. 310-317 ◽  
Author(s):  
Gunup Kwon ◽  
Michael D. Engelhardt ◽  
Richard E. Klingner
Keyword(s):  
Steel Bridges ◽  
Preliminary Design ◽  
Design Recommendations ◽  
Shear Connectors ◽  
Parametric Studies

The Minnesota inverted-tee system: Parametric studies for preliminary design

PCI Journal ◽  
2012 ◽  
Vol 57 (2) ◽  
pp. 162-179
Author(s):  
Roberto Piccinin ◽  
Arturo E. Schultz
Keyword(s):  
Preliminary Design ◽  
Parametric Studies

Analysis and Temperature Control of Hybrid Microcircuits

1973 ◽  
Vol 95 (4) ◽  
pp. 1048-1052 ◽  
Author(s):  
J. T. Pogson ◽  
J. L. Franklin
Keyword(s):  
Temperature Control ◽  
Thermal Modeling ◽  
Preliminary Design ◽  
Temperature Profiles ◽  
Modeling And Analysis ◽  
Parametric Studies ◽  
Temperature Levels ◽  
Typical Component ◽  
Circuit Designer ◽  
Component Temperature

The results of a study on thermal modeling and analysis of hybrid microcircuits are presented. Parametric studies covering typical component mounting methods, bonding agent materials, and component spacing are described. Temperature profiles of substrates, component temperatures, and thermal resistances are presented. It is shown that the use of moly tabs can significantly reduce component temperature levels. Additionally, it is shown that thermal modeling can greatly aid the circuit designer in the layout and preliminary design phases.

Preliminary design recommendations for dip-slip fault–foundation interaction

2008 ◽  
Vol 6 (4) ◽  
pp. 677-687 ◽  
Author(s):  
G. Gazetas ◽  
A. Pecker ◽  
E. Faccioli ◽  
R. Paolucci ◽  
I. Anastasopoulos
Keyword(s):  
Preliminary Design ◽  
Design Recommendations

The Mechanism of Conveyance With Bristled Tracks

1975 ◽  
Vol 97 (1) ◽  
pp. 167-174 ◽  
Author(s):  
W. Mansour ◽  
M. Massoud ◽  
W. Morcos ◽  
C. Lauzier
Keyword(s):  
Material Handling ◽  
Dynamic Equations ◽  
Design Recommendations ◽  
Parametric Studies

Material handling using bristly tracks is investigated. The dynamic equations of the transported mass are developed and digitally simulated. The investigation shows that appreciable gains can be achieved by using one sinusoidal cycle which is imparted normal to the trough. Parametric studies and design recommendations are included.

Unified Rotor Lifting Line Theory

2013 ◽  
Vol 57 (04) ◽  
pp. 181-201
Author(s):  
Brenden P. Epps ◽  
Richard W. Kimball
Keyword(s):  
Axial Flow ◽  
Preliminary Design ◽  
Propeller Design ◽  
Performance Curves ◽  
Line Theory ◽  
Parametric Studies ◽  
Lifting Line ◽  
Lifting Line Method ◽  
Lifting Line Theory ◽  
Line Analysis

A unified lifting line method for the design and analysis of axial flow propellers and turbines is presented. The method incorporates significant improvements to the classical lifting line methods for propeller design to extend the method to the design of turbines. In addition, lifting line analysis methods are developed to extend the usefulness of the lifting line model to allow generation of performance curves for off-design analysis. The result is a fast computational methodology for the design and analysis of propellers or turbines that can be used in preliminary design and parametric studies. Design and analysis validation cases are presented and compared with experimental data.

Configuration of a Thin Circular Membrane Subject to Solar Pressure

2013 ◽  
Vol 290 ◽  
pp. 47-52 ◽  
Author(s):  
F. Couceiro ◽  
P.V. Gamboa ◽  
J.M. Silva ◽  
A.D. Guerman
Keyword(s):  
Focal Plane ◽  
Preliminary Design ◽  
Circular Membrane ◽  
Finite Element Code ◽  
Space Applications ◽  
Parabolic Structure ◽  
Parametric Studies ◽  
Reflecting Surface ◽  
Parameters Of Interest ◽  
Do So

This paper addresses the preliminary design of a parabolic structure suitable for specific space applications, such as in solar power collector systems, which relies upon the sole use of an initially flat circular membrane rigidly constrained across its perimeter. In particular, the possibility for this concept to make use of solar pressure as a means of obtaining the intended parabolic curvature is explored. Assuming the membrane´s film as an ideally reflecting surface, parametric studies are conducted in order to determine several parameters of interest as functions of its radius and thickness. In order to do so, a set of numerical simulations are carried out using the finite element code ABAQUS®. It is shown that the shape of the deformed membrane is very close to parabolic, therefore being capable of concentrating sunlight power over a focal plane.

Experimental and Analytical Study of Various Shear Connectors Used for Cold-Formed Steel-Ferrocement Composite Beam

2015 ◽  
Vol 754-755 ◽  
pp. 315-319 ◽  
Author(s):  
Anis Saggaff ◽  
Talal Alhajri ◽  
M.Md. Tahir ◽  
Khaled Alenezi ◽  
Cher Siang Tan ◽  
...  
Keyword(s):  
Composite Beam ◽  
Analytical Study ◽  
Experimental Tests ◽  
Wire Mesh ◽  
Shear Connectors ◽  
Different Types ◽  
Parametric Studies ◽  
Cold Formed Steel ◽  
Push Out ◽  
Good Agreement

This work presents the experimental tests carried out to evaluate the behaviour of different types of shear connectors proposed for cold formed steel (CFS) section integrated with ferrocement slab as potential used for composite beam. Ten push-out test specimens of cold-formed steel lipped channel sections connected with ferrocement slab were tested. Three types of shear connectors were studied comprised of bolts, self-drilling-screw and bar angle. The connection behavior is analysed in terms of its load-slip relationship and the failure mode. The parametric studies were performed to investigate the effect on the shear connector’s capacity by varying the number of layers of wire mesh used in ferrocement slab and types of shear connector used. A theoretical analysis (Eurocode 4) was carried out to verify the experiment results. The results show that the experimental and theoretical proved to have good agreement with each other.

Dynamic Force and Moment Coefficients for Short Length Annular Seals

1993 ◽  
Vol 115 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Luis San Andres
Keyword(s):  
Numerical Solutions ◽  
Short Length ◽  
Dynamic Force ◽  
Preliminary Design ◽  
Flow Equations ◽  
Dynamic Variations ◽  
Fully Developed Turbulent Flow ◽  
Parametric Studies ◽  
Dynamic Seal ◽  
Close Form

Close form expressions for the dynamic force and moment coefficients in short length annular pressure seals operating at the concentric and aligned position are derived. The analysis considers fully developed turbulent flow within the seal and determines a set of ordinary differential equations for the bulk-flow field due to perturbations in rotor displacements and angular motions. The flow equations are solved exactly for seals of short length where dynamic variations in circumferential velocity are neglected. The analytical solution derived is simple and reasonably accurate for seals of length to diameter ratios (L/D) as large as 0.5 as comparisons with results from full-scale numerical solutions show. The formulae presented are practical for use in preliminary design stages and parametric studies of dynamic seal performance.

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