scholarly journals Experimental tests on real-scale EBF structures with horizontal and vertical links

Data in Brief ◽  
2018 ◽  
Vol 21 ◽  
pp. 1246-1257
Author(s):  
Silvia Caprili ◽  
Francesco Morelli ◽  
Nicola Mussini ◽  
Walter SALVATORE
Keyword(s):  
Experimental Tests ◽  
Real Scale

Experimental Free Vibration of Damaged RC Beam Models

2019 ◽  
Vol 827 ◽  
pp. 499-504
Author(s):  
R. Capozucca ◽  
E. Magagnini ◽  
M.V. Vecchietti
Keyword(s):  
Free Vibration ◽  
Experimental Tests ◽  
Concrete Cover ◽  
Rc Beam ◽  
Rc Beams ◽  
Response Functions ◽  
Bending Tests ◽  
Damage Degree ◽  
Real Scale ◽  
Theoretical Results

Reinforced Concrete (RC) Beam undamaged and damaged were investigated by free vibration to obtain a variation of frequency values at different degree of damage. Experimental tests were carried out on RC beams in scale and in real scale. The damage of RC beams in real scale was obtained by cracking under static bending tests, while in the case of beam in scale is obtained by notches on the concrete cover with different width. In general, the effects on the dynamic response of diffused damages and of concentrated damages on a section of beam have been experimentally analyzed. The envelope of frequency response functions (FRFs) obtained by dynamic experimental tests was elaborated and the changes of natural frequency values were then correlated to the damage degree of RC beams. The experimental data have been discussed and analyzed by comparison with theoretical results.

scholarly journals EVALUATION OF SOLIDS CARRYING CAPACITY IN AERATED FLUID DRILLING: REAL SCALE TESTS AND MODELING

2003 ◽  
Vol 2 (1) ◽  
Author(s):  
A. L. Martins ◽  
A. M. F. Lourenço ◽  
P. H. Andrade Jr. ◽  
V. Silva Jr. ◽  
P. R. C. Silva ◽  
...  
Keyword(s):  
Liquid Velocity ◽  
Particle Diameter ◽  
Experimental Tests ◽  
Major Effect ◽  
Test Facility ◽  
Particle Sedimentation ◽  
Return Times ◽  
Scale Test ◽  
Real Scale ◽  
Fluid Drilling

This paper summarizes the results of two sets of experimental tests performed at PETROBRAS real scale test facility aiming the evaluation of solids return times in aerated fluid drilling. The effect of the following parameters was studied: liquid and gas injection rates, particle diameter and depth. Results indicate that the gas has a major effect in accelerating the liquid phase, which would be responsible for carrying the particles to the surface. The concept of effective liquid velocity coupled with an adequate procedure for particle sedimentation velocity calculation reproduced the experimental results adequately.

Pure Collapse Behavior of Pipelines With D/t Ratio Below 10: Real Scale Experimental Tests and Numerical Studies

2019 ◽  
Author(s):  
Ana Carolina Vilas Bôas ◽  
Gabriel Jorge ◽  
Júlio Márcio e Silva ◽  
Ana Paula F. de Souza ◽  
Rafael F. Solano
Keyword(s):  
Limit State ◽  
Experimental Tests ◽  
State Equation ◽  
Test Results ◽  
Seamless Pipe ◽  
Numerical Studies ◽  
Collapse Behavior ◽  
Subsea Pipelines ◽  
Future Work ◽  
Real Scale

Abstract This work addresses pure collapse experimental tests conducted with DNVGL-450 seamless pipe samples with D/t ratio equal 7.7 and 8.6. Interesting results were achieved, showing that the pipes presented a significant plastic deformation before collapse. There is a limited amount of available technical publications addressing real scale tests with thicker pipes, D/t < 20, that makes the results available quite important for the better understanding of thicker pipes. FEM was conducted and a good correlation with experimental test results were obtained. The experimental and numerical results were correlated with the DNVGL-ST-F101 pure collapse limit state equation, one of the main the rule used in the design of ultra-deep-water subsea pipelines. Conclusions and recommendations for future work based on the results achieved are presented.

scholarly journals Importance of Experimental Tests for the Determination of Modeling Parameters in Fire Safety Engineering

2019 ◽  
Vol 290 ◽  
pp. 12025
Author(s):  
Vincenzo Torretta ◽  
Marco Barozzi ◽  
Luca Talamona ◽  
Sabrina Copelli ◽  
Fabio Conti ◽  
...  
Keyword(s):  
Fire Safety ◽  
Experimental Tests ◽  
Composition Analysis ◽  
Safety Engineering ◽  
Fire Safety Engineering ◽  
Wide Range ◽  
In Fire ◽  
Real Scale ◽  
Heat Released

In the field of Fire Safety Engineering, the application of mathematical models is crucial in order to properly estimate the severity of eventual fires occurring inside workplaces. Such models (like CFast, Ozone, FDS, CFX, Fluent), require a notable amount of specific parameters in order to work. Such parameters are usually available in the current literature, or they can be estimated via experimental tests. In this work, several experimental setups have been performed in order to evaluate such data in the burning of a wide range of materials: cotton, polyethylene and polyester in industrial rollers, flour, sugar, feed for dairy cows, and wood pallets. Cone Calorimeter, Mahler bomb, and real-scale tests have been performed in order to evaluate parameters such as Calorific Values, Total Heat Released, Heat Released Rate and smoke composition analysis. The real-scale tests have been performed with the aim of addressing fire occurring in warehouses, focusing then on an industrial environment. All the values have been compared with theoretical estimations made with the ClaRaf 2.0 software, and it was noticed that they tend to give overestimated values in comparison with empirical results.

scholarly journals EVALUATION OF SOLIDS CARRYING CAPACITY IN AERATED FLUID DRILLING: REAL SCALE TESTS AND MODELING

2003 ◽  
Vol 2 (1) ◽  
pp. 03
Author(s):  
A. L. Martins ◽  
A. M. F. Lourenço ◽  
P. H. Andrade Jr. ◽  
V. Silva Jr. ◽  
P. R. C. Silva ◽  
...  
Keyword(s):  
Liquid Velocity ◽  
Particle Diameter ◽  
Experimental Tests ◽  
Major Effect ◽  
Test Facility ◽  
Particle Sedimentation ◽  
Return Times ◽  
Scale Test ◽  
Real Scale ◽  
Fluid Drilling

This paper summarizes the results of two sets of experimental tests performed at PETROBRAS real scale test facility aiming the evaluation of solids return times in aerated fluid drilling. The effect of the following parameters was studied: liquid and gas injection rates, particle diameter and depth. Results indicate that the gas has a major effect in accelerating the liquid phase, which would be responsible for carrying the particles to the surface. The concept of effective liquid velocity coupled with an adequate procedure for particle sedimentation velocity calculation reproduced the experimental results adequately.

scholarly journals CFD Analysis of Elements of an Adsorption Chiller with Desalination Function

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7804
Author(s):  
Karol Sztekler ◽  
Tomasz Siwek ◽  
Wojciech Kalawa ◽  
Lukasz Lis ◽  
Lukasz Mika ◽  
...  
Keyword(s):  
Experimental Tests ◽  
Maximum Deviation ◽  
Cfd Analysis ◽  
Adsorption Chiller ◽  
Structural Modifications ◽  
Numerical Tests ◽  
Computational Mesh ◽  
Flow Phenomena ◽  
Real Scale ◽  
Good Agreement

This paper presents the results of numerical tests on the elements of an adsorption chiller that comprises a sorption chamber with a bed, a condenser, and an evaporator. The simulation is based on the data and geometry of a prototype refrigeration appliance. The simulation of this problem is unique and has not yet been performed, and so far, no simulation of the phenomena occurring in the systems on a real scale has been carried out. The presented results are part of the research covering the entire spectrum of designing an adsorption chiller. The full process of numerical modeling of thermal and flow phenomena taking place in the abovementioned components is presented. The computational mesh sensitivity analysis combined in the k-ε turbulence model was performed. To verify and validate the numerical results obtained, they were compared with the results of tests carried out on a laboratory stand at the AGH Center of Energy. The results of numerical calculations are in good agreement with the results of the experimental tests. The maximum deviation between the pressure obtained experimentally and by simulations is 1.8%, while for temperatures this deviation is no more than 0.5%. The results allow the identification of problems and their sources, which allows for future structural modifications to optimize the operation of the device.

scholarly journals Experimental tests of post-tensioned girders strengthened with prestressed CFRP composites

2014 ◽  
Vol 13 (3) ◽  
pp. 159-166
Author(s):  
Michał Staśkiewicz ◽  
Renata Kotynia ◽  
Julien Michels ◽  
Christoph Czaderski ◽  
Masoud Motavalli
Keyword(s):  
Materials Science ◽  
Load Capacity ◽  
Experimental Tests ◽  
Field Application ◽  
Flexural Strengthening ◽  
Cfrp Laminates ◽  
University Of Technology ◽  
Federal Laboratories ◽  
Real Scale ◽  
Post Tensioned

The paper presents a research carried out within the framework of the Polish-Swiss “Tulcoempa” project, carried out by Lodz University of Technology and EMPA Swiss Federal Laboratories for Materials Science and Technology. The main goal of the project was to perform the first field application of an innovative, anchorless flexural strengthening with use of prestressed CFRP laminates on an existing bridge in Poland. Laboratory tests were conducted to verify the efficiency of the strengthening of two real-scale, 18.4m long, post-tensioned bridge girders reconstructed at EMPA institute. Flexural strengthening was successful and resulted in an increase of the member’s load capacity by 24% and reduction of the midspan deflection by more than 60%.

An Overview of Stepped Hull Performance Evaluation: Sea Trial Data vs Full-Scale CFD Simulation

2020 ◽  
Author(s):  
Luigi Vitiello ◽  
Simone Mancini ◽  
Rasul Niazmand Bilandi ◽  
Vincenzo Nappo
Keyword(s):  
Performance Evaluation ◽  
High Speed ◽  
Cfd Simulation ◽  
Experimental Tests ◽  
Trial Data ◽  
Full Scale ◽  
Cfd Simulations ◽  
Sea Trial ◽  
Comparison Of The Results ◽  
Real Scale

It is well known that the dynamic of the stepped hull in real scale is rather complex and it’s not easy to predict that using empirical or mathematical approaches, and by the numerical and experimental way as well. Moreover, there is a huge lack in the literature of data related to sea trials of the stepped hull. Furthermore, the reliability of full-scale CFD simulations is not widely proven and validated especially for high speed and planing hull. For these several reasons, in this paper, the authors are focused on the comparison of the results carried out from model experimental tests performed in the model basin, full-scale CFD simulations, and sea trial tests. The performed simulations in full-scale have been compared to the extrapolated experimental tests and the sea-trial results. Moreover, the dynamic trim angle and the dynamic wetted surface have been taken into account to assess the reliability of the full-scale simulation performed. The stepped hull considered is a Mito 31 outboard Rigid Inflatable Boat (RIB) built by MV Marine Srl Company.

Confinement of Full-Scale Masonry Columns with FRCM Systems

2017 ◽  
Vol 747 ◽  
pp. 374-381 ◽  
Author(s):  
Gennaro Maddaloni ◽  
Alessio Cascardi ◽  
Alberto Balsamo ◽  
Marco di Ludovico ◽  
Francesco Micelli ◽  
...  
Keyword(s):  
Axial Strain ◽  
Experimental Tests ◽  
Full Scale ◽  
Experimental Program ◽  
Load Carrying Capacity ◽  
Compression Tests ◽  
Load Carrying ◽  
A New Technique ◽  
Real Scale ◽  
Inorganic Matrix

The effectiveness of FRP systems as a confinement technique to strengthen masonry columns has been widely investigated in the last decades. Recently, a new technique, Fabric Reinforced Cementitious Matrix (FRCM), based on the use of fibrous nets embedded in inorganic matrix, has been developed and investigated as a strengthening solution in masonry buildings. Actually, the number of experimental tests on masonry columns confined by using FRCM systems is very limited, especially for real scale specimens. To fill such gap an experimental program aimed at investigating the behaviour of full scale columns made of limestone masonry blocks confined with different FRCM systems has been carried out. The results of four uniaxial compression tests are illustrated and discussed. The used FRCM systems are made with glass and basalt dry nets embedded in a lime-based mortar. The influence of transverse confinement by using internal reinforcement in forms of pultruded GFRP bars has been also investigated. The mechanical properties of the confined specimens resulted increased in terms of load-carrying capacity and ultimate axial strain.

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