Notice of Retraction: Study of erosion test method of steel structure coating in sandstorm

2011 ◽  
Author(s):  
Yunhong Hao ◽  
Yongming Xing ◽  
Anli Wu ◽  
Li Li
Keyword(s):  
Steel Structure ◽  
Test Method ◽  
Erosion Test

Evaluation of Seismic Behavior of a Braced Tubular Steel Structure by Pseudodynamic Testing

1984 ◽  
Vol 106 (3) ◽  
pp. 319-328 ◽  
Author(s):  
P. B. Shing ◽  
A. S. Javadian-Gilani ◽  
S. A. Mahin
Keyword(s):  
Test Specimen ◽  
Seismic Behavior ◽  
Structural Model ◽  
Computer Control ◽  
Experimental Studies ◽  
Steel Structure ◽  
Test Method ◽  
Experimental Procedure ◽  
On Line ◽  
Pseudodynamic Testing

The inelastic seismic behavior of an X-braced, tubular steel frame is studied experimentally by means of pseudodynamic testing. The pseudodynamic method, which utilizes a numerical algorithm in the on-line computer control of a test specimen, can realistically simulate the seismic response of a structural model. This paper presents a brief outline of the experimental procedure and the results of the tubular frame tests, including the global responses, the inelastic energy-dissipation capabilities, and the failure mechanism of the frame at various excitation levels. Correlation of these results with previous experimental studies illustrates the feasibility and accuracy of the new test method.

scholarly journals Dynamic Property of a New Type of Postearthquake Temporary Prefabricated Lightweight Steel Structure

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
GuoQi Xing ◽  
Qing-hai Li ◽  
JingJie Yu ◽  
Wei Xuan
Keyword(s):  
Finite Element ◽  
Experimental Model ◽  
Dynamic Property ◽  
Natural Frequencies ◽  
Damping Ratio ◽  
Steel Structure ◽  
Full Scale ◽  
Test Method ◽  
Lightweight Steel ◽  
New Type

For a new type of postearthquake temporary prefabricated lightweight steel structure proposed in this paper, mainly composed of steel frame, prefabricated hanger slabs, prefabricated hanger columns, reinforced concrete superposed slabs, etc., parameters of dynamic property for the structure, including natural frequency, vibration mode, damping ratio, etc., are determined by the test method. For prefabricated hanger columns and prefabricated hanger slabs, they are all produced with construction waste in factory and assembled on-site, which can form exterior walls. The united method, based on forced vibration method and ambient random vibration method, can quickly obtain accurate natural frequencies of the full-scale two-story experimental model. In this paper, damping oscillatory method is used to obtain damping ratio which can be determined only by the test method. In order to analyse the modal of the experimental model, a finite element model for the full-scale two-story experimental model is established, where the weight of prefabricated hanger slabs is assumed to be supported by prefabricated hanger columns, and the stiffness of prefabricated hanger columns is also increased. In addition, the connections between lightweight steel frame and prefabricated hanger columns are regarded as flexible connection. Comparing natural frequencies obtained from the finite element method with that obtained from the test method, magnification factor of stiffness for prefabricated hanger column is determined. In the analysis of modal for the full-scale two-story experimental model, the results show that the experimental model satisfies the requirement of design for seismic performance.

scholarly journals INSPEKSI TEKNIK STRUKTUR BETON PASCA BAKAR DAN METODE PERBAIKANNYA

INFO-TEKNIK ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
Sulardi Sulardi
Keyword(s):  
Steel Structure ◽  
Ultrasonic Pulse ◽  
Test Method ◽  
Inspection Method ◽  
Compressive Strength Test ◽  
Acceptable Method ◽  
Crack Repair ◽  
Check Method ◽  
Damage Condition ◽  
Working Method

The objective of the study was to provide an overview of the inspection method to determine the condition grade and method of improvement on the post-burn concrete chimney reinforced concrete steel structure. Inspection method using visual check method, hammer test compressive strength test and ultrasonic pulse velocity test (UPV Test) method with spontaneous damage condition and light crack. Method of crack repair with material specification of low pressure injection (LPI) method with material specification Resin Concretive 2525 and Resin Barra Emulsion 57, spalling improvement with epoxy grouting method using material flowable microconcrete specification, with good result, as per specification and acceptable. Method of repair of crack injection with epoxy grout method has been registered as a standard working method in PT.Pertamina RU V and can be replicated to overcome similar problems

Cavitation Erosion Behavior of the Antifriction Alloy YSn83

2014 ◽  
Vol 782 ◽  
pp. 257-262 ◽  
Author(s):  
Nadia Potoceanu ◽  
Marian Dumitru Nedeloni ◽  
Daniel Chirus ◽  
Danut Florea
Keyword(s):  
Cavitation Erosion ◽  
Experimental Tests ◽  
Standard Test ◽  
Test Method ◽  
Laboratory Research ◽  
Practical Applications ◽  
Erosion Test ◽  
Hydraulic Turbines ◽  
Antifriction Alloy ◽  
Materials Used

This paper presents the cavitation erosion research of the antifriction alloy YSn83 regarding on its behavior in laboratory. The antifriction alloy YSn83 is not subject to cavitation erosion in its practical applications, as is happening in reality at the materials used in hydraulic turbines, valves, piping; but the experimental tests for this material, highlight the laboratory research on its behavior by means of images and graphs in this paper. The laboratory tests were performed in accordance with the standards G32-92 (Standard Method of Vibratory Cavitation Erosion Test) and G32-10 (Standard Test Method for Cavitation Erosion Using Vibratory Apparatus).

An Erosion Test for Dental Cements

1985 ◽  
Vol 64 (8) ◽  
pp. 1100-1104 ◽  
Author(s):  
A.W.G. Walls ◽  
J.F. McCabe ◽  
J.J. Murray
Keyword(s):  
Linear Relationship ◽  
Quantitative Measurement ◽  
Test Method ◽  
New Method ◽  
Acid Base ◽  
In Vivo Tests ◽  
Erosion Test ◽  
Acidic Conditions

A new method for the in vitro measurement of the erosion of dental cements is described which allows repeated, gentle removal of loose surface debris and provides a direct quantitative measurement of material lost. A linear relationship for erosion against time is demonstrated for a glass polyalkenoate material under mildly acidic conditions. This test method is applicable to all acid/base-type cements and gives results comparable to those from in vivo tests.

B21 Cavitation erosion test by anvil-type test method

2006 ◽  
Vol 2006.59 (0) ◽  
pp. 45-46
Author(s):  
Daisuke FUMIKURA ◽  
Kenji SUZUKI ◽  
Eizo URATA
Keyword(s):  
Cavitation Erosion ◽  
Test Method ◽  
Type Test ◽  
Erosion Test

Erosion-Behaviors of the Steel Structure Coating Eroded at Low Erosion-Angle in Sandstorm Environment

2011 ◽  
Vol 383-390 ◽  
pp. 3933-3938
Author(s):  
Yun Hong Hao ◽  
Yong Ming Xing ◽  
Li Li
Keyword(s):  
Mass Loss ◽  
Wear Mechanism ◽  
Measurement Method ◽  
Decisive Role ◽  
Steel Structure ◽  
Erosion Wear ◽  
Loss Measurement ◽  
High Toughness ◽  
Erosion Test ◽  
Erosion Zone

Aiming at the durability deterioration of the coating of steel structure because of being eroded in sandstorm. through the erosion test to the coating of steel structure by airflow jet with sand at low erosion-angle, the mass-loss measurement method is used to assess erosion-wear degree of the coating, Observation of microstructure of the erosion zone using SEM to analyze the erosion-wear mechanism of the coating, and proposes a assessment formula for assessing the erosion-wear degree of the coating. Results show that the erosion-wear mechanism is that erosion is mainly micro-cutting role at low erosion-angle, materials hardness is decisive factor, and erosion is mainly compression deformation at high erosion-angle, materials toughness plays decisive role, as the coating is low hardness and high toughness materials, which is eroded more seriously at low erosion-angle. The reliability of the assessment formula is verified to assess the erosion-wear degree of the coating. The study will provide basis for exactly assessing the durability of steel structure.

DEVELOPMENT OF A NEW RAIN EROSION TEST METHOD

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1056-1061 ◽  
Author(s):  
DONG-TEAK CHUNG ◽  
HYUNG KANG ◽  
DOO-HAN JIN
Keyword(s):  
Ceramic Material ◽  
Water Droplet ◽  
Low Pressure ◽  
Test Method ◽  
Silicon Rubber ◽  
Specimen Holder ◽  
Air Gun ◽  
Erosion Test ◽  
The Impact ◽  
Rain Erosion

The nose of a missile, flying through raining region with a supersonic speed, is subjected to the rain erosion because the nose is made of a brittle ceramic material. Various test methods are used to address such a phenomenon. However, most of the methods are expensive and/or require complicated facilities. The simple yet very effective rain erosion test method is developed. It consists of (1) a low pressure air gun, (2) a sabot assembly for launching single rain drop, (3) a stopper, and (4) a specimen holder block. The sabot assembly similar to the hypodermic syringe carries specific amount of water toward the stopper launched by the low pressure air gun. When the impact occurs against the stopper which stops the sabot, the water and the steel plunger (at the back of the sabot) continues pushing the sabot to generate a high pressure in the chamber filled with resilient silicon rubber. The pressurized silicon rubber then is squeezed through the small opening in front of the sabot, thus, accelerates the water droplet to a much higher velocity. The velocity of the droplet is measured by the make-screen method, where there are two aluminum foils with an insulating layer in between. The droplet velocity up to 800 m/s is successfully attained using a low pressure air compressor. The specimen made of a ceramic material is placed in front of the high speed water droplet and the rain erosion damage on the surface of the specimen is observed.

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