Simplified Analytical Determination of Bending Moments in a Two-Way Slab Using a Web-Based Application

2021 ◽  
Vol 108 ◽  
pp. 45-52
Author(s):  
Jakub Holan ◽  
Radek Štefan
Keyword(s):  
Reinforced Concrete ◽  
Analytical Methods ◽  
Analytical Determination ◽  
Correction Coefficient ◽  
The Novel ◽  
Bending Moments ◽  
Web Based ◽  
User Friendly ◽  
Analytical Approaches

In the last decade, the computing power of computers has significantly increased, which enabled very detailed and accurate numerical static non-linear analyses of reinforced concrete structures to be carried out using sophisticated commercial software. However, higher risk of errors, both in the calculation inputs and algorithm, is linked with the increased detail and accuracy of numerical modelling. For this reason, it is convenient to verify the results provided by sophisticated software using simplified analytical approaches. In order to provide a tool for quick and easy verification of results provided by sophisticated software, a novel web-based application employing simplified analytical methods has been developed by the authors of this paper. This web-based application is capable of quick and easy calculations of bending moments in reinforced concrete two-way slabs. For the calculation of bending moments, the Marcus Method is employed. This method introduces a correction coefficient to the Rankine-Grashoff Theory of Equal Deflections in order to account for the torsional restraints at the corners of the slab. These analytical methods are algorithmized and implemented using the JavaScript programming language. A graphical user interface for the input of data and for the interpretation of results is created using the HTML markup language. The novel web-based application is freely available and works on all common devices and operating systems. From the presented results, it is clear that the novel web-based application is quick, easily available, user-friendly, and intuitive. The web-based application can be used for the verification of the calculated bending moments during the design of a reinforced concrete two-way slab.

Modeling of Gear Hobbing: Part II — A Computer Supported Experimental-Analytical Determination of the Wear Progress to Optimize the Tool Life Time

1999 ◽  
Author(s):  
Konstantinos D. Bouzakis ◽  
Spiros Kombogiannis ◽  
Aristomenis Antoniadis ◽  
Nectarios Vidakis
Keyword(s):  
Tool Wear ◽  
Prediction Models ◽  
Digital Simulation ◽  
Life Time ◽  
Analytical Determination ◽  
Tool Wear Prediction ◽  
Gear Hobbing ◽  
User Friendly ◽  
Continuous Enrichment

Abstract Tool wear prediction models for gear hobbing were presented in the first part of this paper. To determine the constants of the equations used in these models, fly hobbing experiments with uncoated and coated HSS tools were conducted. Hereby, it was necessary to modify the fly hobbing kinematics from continuous tangential feed to continuous axial feed. The experimental data were evaluated, and correlated to the analytical ones, elaborated through the described digital simulation of the cutting process. The determined constants of the wear laws for the investigated tools were used in a further developed user friendly software, enabling the prediction of the tool wear accomplishment in gear hobbing. On that account the wear development can be precisely foreseen and the tangential shift of the tool is optimized. The open and modular structure of the developed code enables the continuous enrichment of its database with other type of coating and workpiece materials. With the aid of the aforementioned techniques, the superiority of coated HSS tools in comparison to uncoated ones is also quantitatively exhibited.

scholarly journals ON THE EFFECTIVENESS OF OBLIQUE CAISSON REINFORCED CONCRETE FLOORS

2021 ◽  
Vol 11 (3) ◽  
pp. 20-25
Author(s):  
Mikhail V. MOZGOLOV ◽  
Arina V. TURANOVA
Keyword(s):  
Reinforced Concrete ◽  
Calculation Method ◽  
Analytical Methods ◽  
Analytical Calculation ◽  
Computer Models ◽  
Bending Moments ◽  
Outer Contour ◽  
Complex Operation ◽  
Nite Element ◽  
Spatial System

The distribution of forces in the beams of a straight and oblique monolithic reinforced concrete caisson fl oor of a square plan is compared. The forces in the beams are determined by well-known analytical methods and using fi nite element models of the SCAD PC. The calculations showed that the forces in the beams of the oblique caisson fl oor, determined analytically and using computer models, diff er signifi cantly, which indicates the complex operation of the spatial system, which is not taken into account by the analytical calculation method based on the theory of calculating plates supported by the contour. The obtained data indicate that a square caisson fl oor with beams installed at an angle of 450 to the reference contour has greater rigidity and lower values of bending moments compared to straight caissons. When the ratio of the sides of the overlap L2 > 1,5 . L1 to ensure the eff ect of supporting the contour, the location of the beams in relation to the outer contour should be at an angle of 45°.

scholarly journals RaDMaX online: a web-based program for the determination of strain and damage profiles in irradiated crystals using X-ray diffraction

2020 ◽  
Vol 53 (2) ◽  
pp. 587-593
Author(s):  
A. Boulle ◽  
V. Mergnac
Keyword(s):  
Web Application ◽  
The Internet ◽  
Programming Environment ◽  
X Ray Diffraction ◽  
Web Browser ◽  
Web Based ◽  
X Ray ◽  
Depth Profiles ◽  
User Friendly

RaDMaX online is a major update to the previously published RaDMaX (radiation damage in materials analysed with X-ray diffraction) software [Souilah, Boulle & Debelle (2016). J. Appl. Cryst. 49, 311–316]. This program features a user-friendly interface that allows retrieval of strain and disorder depth profiles in irradiated crystals from the simulation of X-ray diffraction data recorded in symmetrical θ/2θ mode. As compared with its predecessor, RaDMaX online has been entirely rewritten in order to be able to run within a simple web browser, therefore avoiding the necessity to install any programming environment on the users' computers. The RaDMaX online web application is written in Python and developed within a Jupyter notebook implementing graphical widgets and interactive plots. RaDMaX online is free and open source and can be accessed on the internet at https://aboulle.github.io/RaDMaX-online/.

Analytical determination of bifurcations in an impact oscillator

1994 ◽  
Vol 347 (1683) ◽  
pp. 353-364 ◽  
Keyword(s):  
Analytical Methods ◽  
Coefficient Of Restitution ◽  
Analytical Determination ◽  
Impact Oscillator ◽  
Grazing Bifurcation ◽  
Codimension Two ◽  
Dimension One ◽  
Codimension Two Bifurcation ◽  
Grazing Bifurcations

It is well known that some solutions for a sinusoidally driven oscillator with linear stiffness and impacts at rigid stops modelled with a coefficient of restitution impact law can be located analytically. Recently, new co-dimension one bifurcations called grazing bifurcations have been found in such systems. Here we present analytical results which show how the type of grazing bifurcation changes with parameter, and that when the type of grazing bifurcation changes a codimension two bifurcation occurs. The simplest grazing bifurcations involve orbits of period-1, but we show that the same analytical methods can be used to locate some subharmonics and their bifurcations.

scholarly journals Increasing power in the analysis of responder endpoints in rheumatology: a software tutorial

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Martina McMenamin ◽  
Michael J. Grayling ◽  
Anna Berglind ◽  
James M. S. Wason
Keyword(s):  
Sample Size ◽  
Lupus Erythematosus ◽  
Risk Difference ◽  
The Novel ◽  
Size Estimation ◽  
Web Based ◽  
Point Estimates ◽  
Novel Approach ◽  
R Packages ◽  
User Friendly

Abstract Background Composite responder endpoints feature frequently in rheumatology due to the multifaceted nature of many of these conditions. Current analysis methods used to analyse these endpoints discard much of the data used to classify patients as responders and are therefore highly inefficient, resulting in low power. We highlight a novel augmented methodology that uses more of the information available to improve the precision of reported treatment effects. Since these methods are more challenging to implement, we developed free, user-friendly software available in a web-based interface and as R packages. The software consists of two programs: one that supports the analysis of responder endpoints; the second that facilitates sample size estimation. We demonstrate the use of the software to conduct the analysis with both the augmented and standard analysis method using the MUSE study, a phase IIb trial in patients with systemic lupus erythematosus. Results The software outputs similar point estimates with smaller confidence intervals for the odds ratio, risk ratio and risk difference estimators using the augmented approach. The sample size required in each arm for a future trial using the novel approach based on the MUSE data is 50 versus 135 for the standard method, translating to a reduction in required sample size of approximately 63%. Conclusions We encourage trialists to use the software demonstrated to implement the augmented methodology in future studies to improve efficiency.

scholarly journals Design of a Participatory Web-Based Geographic Information System for Determining Industrial Zones

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Endang Chumaidiyah ◽  
Mouli De Rizka Dewantoro ◽  
Anton Abdulbasah Kamil
Keyword(s):  
Site Selection ◽  
Geographic Information ◽  
Industrial Zone ◽  
Web Based ◽  
Smart Systems ◽  
User Friendly ◽  
Industrial Zones ◽  
Hierarchy Process ◽  
New Industry

Different types of site selection exploited by geographic information systems (GIS) by combining various types of data relate to the purpose of site selection. In reality, numerous factors including physical, environmental, and social factors affect the site selection in terms of deciding the location of a new industry. Accordingly, this paper conceives systems for determining new industrial zones in the form of web-based applications or ordinarily called web-based GIS. Thus, the application named the potential industrial zone smart systems, in which the prototype of the application is able to facilitate planning the determination of new industrial zone based on six parameters throughout the analytical hierarchy process method. The result weights of six criteria are soil type 35%, land use 32%, land slope 15%, the distance of land to river 9%, the distance of land from road and accessibility 5%, and the distance of land to public facilities 4%. Additionally, the web-based GIS is a user-friendly application to determine the planned industrial location. Further, the demonstration runs effortlessly in exhibiting data on the potential of new industrial zones in the city of Bekasi, West Java Province of Indonesia.

scholarly journals FIRST EDITION

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Martin Steppe
Keyword(s):  
Systematic Review ◽  
Analytical Methods ◽  
Analytical Techniques ◽  
Editorial Team ◽  
Analytical Determination ◽  
Porto Alegre ◽  
Analytical Research

Analysis of drugs requires standing search for reliable analytical techniques, essential to assure their identification and concentration in several matrices. In this context, the edition of scientific works has the objective of contributing with the researchers of the analytical area collaborating with the diffusion and knowledge related to this subject.The editorial team is celebrating the first volume of the journal Drug Analytical Research, a result of the effort of professors and collaborators who have taken up the challenge of expanding the analytical research involving therapeutic substances.The scope of the journal is focused on the analytical determination of drugs in different matrices, impurities, propositions of new analytical methods, as well as the systematic review of issues of separation and quantitative determination.At this moment, we would like to invite to access the website of the journal through the address (http://seer.ufrgs.br/index/php/dar) and appreciate the articles and reviews included in this first edition.Finally, we thank all those who supported this project, especially to Dra. Amanda Thomas Barden, who helped effectively in all stages of publication of this journal. Porto Alegre, August 28th, 2017Martin SteppeLead Editor                                                                                                                                                                                                                               

scholarly journals Analytical determination of the availability of a rotary excavator as a part of coal mining system: Case study: Rotary excavator SchRs 800.15/1.5 of the Drmno open pit

2020 ◽  
pp. 25-36
Author(s):  
Uglješa Bugarić ◽  
Miloš Tanasijević ◽  
Miljan Gomilanović ◽  
Andrija Petrović ◽  
Miloš Ilić
Keyword(s):  
Working Conditions ◽  
Analytical Methods ◽  
Essential Elements ◽  
Open Pit ◽  
Analytical Determination ◽  
Rotary Excavator ◽  
Mining System ◽  
System Maintenance

Rotary excavators as the basic machines at the open pits of lignite operate in very difficult working conditions, where they are constantly expected to be highly productive, reliable, available and safe as the production carriers. Determining the availability as well as the duration and number of failures using the analytical methods allows to analyze the key influencing factors on their occurrence and values of these parameters and to determine the essential elements of system maintenance and management in order to optimize them.

scholarly journals Increasing power in the analysis of responder endpoints in rheumatology: a software tutorial

2020 ◽  
Author(s):  
Martina McMenamin ◽  
Michael J Grayling ◽  
Anna Berglind ◽  
James MS Wason
Keyword(s):  
Sample Size ◽  
Lupus Erythematosus ◽  
The Novel ◽  
Size Estimation ◽  
Analysis Method ◽  
Primary Analysis ◽  
Web Based ◽  
Future Studies ◽  
Novel Approach ◽  
User Friendly

Background: Composite responder endpoints feature frequently in rheumatology due to the multifaceted nature of many of these conditions. Current analysis methods used to analyse these endpoints discard much of the data used to classify patients as responders; they are therefore highly inefficient and result in low power. Methods: We highlight a novel augmented methodology that uses more of the information available to improve the precision of reported treatment effects. Since these methods are more challenging to implement, we have developed free, user friendly software available in a web-based interface. The software consists of two programs: one that supports the analysis of responder endpoints; the second is used for sample size estimation. We demonstrate the augmented analysis method and its software using the MUSE study, a phase IIb trial in patients with systemic lupus erythematosus. Results: We show the software can be used to analyse the trial with efficiency gains translating to a reduction in required sample size of 63%. Furthermore, we illustrate how the software can be used to choose the sample size needed in a future trial that will use the novel approach as the primary analysis method. Conclusion: We encourage trialists to utilise the software we have developed to implement augmented methodology in future studies to improve efficiency.

Sign in / Sign up

Export Citation Format

Share Document