A Practical Design Tool For Wave Impact On Bow and Deck Structures

2001 ◽  
pp. 611-619 ◽  
Author(s):  
Øyvind Hellan ◽  
Jan Roger ◽  
Hoff Carl ◽  
Trygve Stansberg
Keyword(s):  
Design Tool ◽  
Wave Impact ◽  
Practical Design

Performance in Fire of Fibre Reinforced Polymer Strengthened Concrete Beams and Columns: Recent Research and Implications for Design

2014 ◽  
Vol 5 (4) ◽  
pp. 353-366 ◽  
Author(s):  
Mark Green ◽  
Kevin Hollingshead ◽  
Noureddine Bénichou
Keyword(s):  
Conceptual Model ◽  
Concrete Beams ◽  
Design Tool ◽  
Fire Performance ◽  
Reinforced Polymers ◽  
Reinforced Polymer ◽  
Practical Design ◽  
Fibre Reinforced Polymer ◽  
Full Scale Tests ◽  
In Fire

This paper considers the fire performance of concrete beams and columns that have been strengthened with fibre reinforced polymers (FRPs). Results from four recent full-scale tests are presented. A newly developed type of insulation was employed and the thickness of the insulation (15 to 20 mm) was approximately half that provided in earlier tests. All of the members survived four hours of the fire exposure. A conceptual model for design to determine when insulation is required is also presented. Further research needed to fully develop the conceptual model to a more practical design tool is outlined.

Effect of Damping on Asymmetric Systems

2003 ◽  
Vol 125 (3) ◽  
pp. 359-364 ◽  
Author(s):  
Paolo Gallina
Keyword(s):  
Sensitivity Analysis ◽  
Design Tool ◽  
Sufficient Condition ◽  
Parameter Uncertainties ◽  
Physical Explanation ◽  
Damping Coefficients ◽  
Eigenvalue Sensitivity ◽  
Damped System ◽  
Practical Design ◽  
Long Time

This paper addresses the phenomenon of the destabilizing effect of slight damping on asymmetric linear systems. Previous works had showed that the destabilizing effect, regarded for a long time as a “paradox,” depends upon the ratio of the damping coefficients. This work extends those results to n-dof systems. In fact, conditions for a general asymmetric n-dof slightly damped system to be stable are obtained. Also, a useful sufficient condition is carried out. This practical design tool gives optimum damping ratios and takes into consideration the parameter uncertainties as well. The solution is based on the eigenvalue sensitivity analysis. Moreover, a formal physical explanation of the destabilizing effect of damping is given. Eventually, the theory is validated by means of a simple example.

Computer graphics in nonlinear design problems

1979 ◽  
Vol 6 (1) ◽  
pp. 97-111 ◽  
Author(s):  
John L. Gross ◽  
Thomas A. Mutryn ◽  
William McGuire
Keyword(s):  
Computer Graphics ◽  
Analytical Procedure ◽  
Color Image ◽  
General Procedure ◽  
Design Tool ◽  
Interactive Approach ◽  
Design Problems ◽  
Analysis And Design ◽  
Nonlinear Design ◽  
Practical Design

The purpose of this paper is to describe an interactive computer graphics approach to the analysis and design of structures exhibiting nonlinear structural behavior. A general procedure for the nonlinear analysis of planar frame structures, which accounts for member yielding, is described. In addition, the graphics programs required to input an arbitrary planar structure, monitor the analytical procedure, and aid in evaluating the results of the incremental analysis are presented. A procedure for generating a color image of the deflected structure, where the color indicates the proximity to yield, is also presented. This interactive approach to a powerful analysis procedure, aided by graphic interpretation of input and analysis results, provides a practical desïgn tool.

scholarly journals Using discrete-element method hindcasting of screw pile performance for practical design

2021 ◽  
Vol 11 (4) ◽  
pp. 1-7
Author(s):  
Y.U. Sharif ◽  
M.J. Brown ◽  
M.O. Ciantia ◽  
A.J. Lutenegger ◽  
P.V. Pavan Kumar ◽  
...  
Keyword(s):  
Discrete Element Method ◽  
Design Procedure ◽  
Field Tests ◽  
Discrete Element ◽  
Design Tool ◽  
Axial Capacity ◽  
Geometry Design ◽  
Screw Pile ◽  
Practical Design ◽  
Element Method

Screw piles have been used to support a variety of structures due to their ease of installation and high axial capacity. Recently, screw piles have been proposed as an alternative foundation solution for offshore renewable structures due to their quiet or silent installation. Due to their variable geometry, design and prediction of installation requirements and its effect on in-service capacity may be challenging. In this research study, the discrete-element method (DEM) is used to numerically recreate a series of onshore field tests. The aim of the study is to investigate the ability of DEM to be used as a practical design tool for the design and deployment of screw piles. In this case study, the effect of the geometric helix pitch on the installation torque and tensile capacity of screw piles installed into sand is investigated. DEM results show that the geometric pitch of a screw pile appears to have little effect on the installation torque. The results show that DEM has the potential to be used as a practical design procedure for complex foundation installation where the simulation needs to capture installation effects.

Flooding Simulation as a Practical Design Tool

2009 ◽  
Vol 56 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Pekka Ruponen ◽  
Antti Metsä ◽  
Christopher Ridgewell ◽  
Pasi Mustonen ◽  
◽  
...  
Keyword(s):  
Design Tool ◽  
Practical Design

On the Practical Applicability of VC Dimension Bounds

1995 ◽  
Vol 7 (6) ◽  
pp. 1265-1288 ◽  
Author(s):  
Sean B. Holden ◽  
Mahesan Niranjan
Keyword(s):  
Design Tool ◽  
Sample Complexity ◽  
Vc Dimension ◽  
Formant Frequencies ◽  
Early Results ◽  
Vowel Formant ◽  
Practical Design ◽  
Series Of Experiments ◽  
Valid Generalization

This article addresses the question of whether some recent Vapnik-Chervonenkis (VC) dimension-based bounds on sample complexity can be regarded as a practical design tool. Specifically, we are interested in bounds on the sample complexity for the problem of training a pattern classifier such that we can expect it to perform valid generalization. Early results using the VC dimension, while being extremely powerful, suffered from the fact that their sample complexity predictions were rather impractical. More recent results have begun to improve the situation by attempting to take specific account of the precise algorithm used to train the classifier. We perform a series of experiments based on a task involving the classification of sets of vowel formant frequencies. The results of these experiments indicate that the more recent theories provide sample complexity predictions that are significantly more applicable in practice than those provided by earlier theories; however, we also find that the recent theories still have significant shortcomings.

Numerical Analysis as a Practical Design Tool in Geo-Engineering

2000 ◽  
Author(s):  
Charles Fairhurst ◽  
Branko Damjanac ◽  
Roger Hart
Keyword(s):  
Numerical Analysis ◽  
Design Tool ◽  
Practical Design
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