Full-scale tests on two-story SCBFs with Through–Gusset Plate in brace-to-CFT column connections

2021 ◽  
Vol 187 ◽  
pp. 106946
Author(s):  
Samira Ebrahimi ◽  
Seyed Rasoul Mirghaderi ◽  
Seyed Mehdi Zahrai
Keyword(s):  
Full Scale ◽  
Gusset Plate ◽  
Cft Column ◽  
Full Scale Tests

scholarly journals Investigation of the stress-deformation state of a bolt-joint assembly of cold-bent thin-walled profiles

Vestnik MGSU ◽  
2019 ◽  
pp. 831-843 ◽  
Author(s):  
Ivan L. Kuznetsov ◽  
Marat A. Salakhutdinov ◽  
Rishat G. Gainetdinov
Keyword(s):  
Computer Simulation ◽  
Sheet Steel ◽  
Full Scale ◽  
Gusset Plates ◽  
Gusset Plate ◽  
Flat Wall ◽  
Deformation State ◽  
Stress Deformation ◽  
Thin Walled ◽  
Full Scale Tests

Introduction: cold-bent profiles with a segment of the concave flat wall are used for manufacturing trusses. In these trusses, the connection between the chords and the webbing is made using gusset plates attached with bolts. Due to the shape of these profiles, the bolts can only be installed in two outer rows. While the profile wall at the place of flat concavity cannot be tightly connected with the gusset plate, so the actual work of such joints is to be studied. The aim of the study is numerical and experimental research of the stress-deformation state of the attachment of a cold-bent thin-walled profile with a segment of the concave flat wall using two rows of bolts. Materials and methods: paired cold-bent profiles with a segment of the concave flat wall connected utilizing bolted gusset plate were used for full-scale tests. Computer simulation and calculation were performed using the SolidWorks software. An examination of the assembly with two rows of bolts was carried out. Results: calculations and full-scale tests of the bolted assembly showed the variation of the forces in the bolts and profiles. It is suggested to eliminate the gap between the walls of cold-bent profiles and gusset plates that allows installing an increased number of bolt rows and reducing stresses in the thin-walled profile of the joint. Conclusions: the results of the study showed that the installation of only two rows of bolts in the joint of thin-walled profiles with a segment of the concave flat wall worsens their stress-deformation state. When filling the concave segment of the wall with sheet steel pieces, it is possible to increase the number of bolt rows and reduce the number of the bolts, increasing the bearing capacity of the cold-bent thin-walled profile and the joint as a whole.

Investigation of planing craft maneuverability using full-scale tests

2021 ◽  
pp. 147509022110303
Author(s):  
Kazem Sadati ◽  
Hamid Zeraatgar ◽  
Aliasghar Moghaddas
Keyword(s):  
Full Scale ◽  
Performance Characteristics ◽  
Forward Speed ◽  
Speed Reduction ◽  
Planing Craft ◽  
Full Scale Tests ◽  
Turning Maneuver

Maneuverability of planing craft is a complicated hydrodynamic subject that needs more studies to comprehend its characteristics. Planing craft drivers follow a common practice for maneuver of the craft that is fundamentally different from ship’s standards. In situ full-scale tests are normally necessary to understand the maneuverability characteristics of planing craft. In this paper, a study has been conducted to illustrate maneuverability characteristics of planing craft by full-scale tests. Accelerating and turning maneuver tests are conducted on two cases at different forward speeds and rudder angles. In each test, dynamic trim, trajectory, speed, roll of the craft are recorded. The tests are performed in planing mode, semi-planing mode, and transition between planing mode to semi-planing mode to study the effects of the craft forward speed and consequently running attitude on the maneuverability. Analysis of the data reveals that the Steady Turning Diameter (STD) of the planing craft may be as large as 40 L, while it rarely goes beyond 5 L for ships. Results also show that a turning maneuver starting at planing mode might end in semi-planing mode. This transition can remarkably improve the performance characteristics of the planing craft’s maneuverability. Therefore, an alternative practice is proposed instead of the classic turning maneuver. In this practice, the craft traveling in the planing mode is transitioned to the semi-planing mode by forward speed reduction first, and then the turning maneuver is executed.

Full-scale tests of the trash racks of the Kapchagai hydroelectric station

1984 ◽  
Vol 18 (4) ◽  
pp. 166-170
Author(s):  
A. L. Rakhmanova ◽  
I. O. Rybak
Keyword(s):  
Hydroelectric Station ◽  
Full Scale ◽  
Full Scale Tests

THE RULE OF COMBINING A PRIORI AND EXPERIMENTAL INFORMATION IN THE TASKS OF MANAGING TESTS OF COMPLEX TECHNICAL PRODUCTS ACCORDING TO THE BERNOULLI SCHEME

2020 ◽  
pp. 3-13
Author(s):  
Yu. I. Buryak ◽  
A. A. Skrynnikov
Keyword(s):  
Field Experiments ◽  
A Priori ◽  
Field Tests ◽  
Experimental Information ◽  
Full Scale ◽  
Testing Complex ◽  
Series Of Experiments ◽  
Full Scale Tests ◽  
Technical Products

The article is devoted to the substantiation of the procedure for testing complex technical systems to assess the probability of performing the task, taking into account a priori data obtained from the results of modeling, field tests of components and prototypes, operation of analogues, etc. The conditions for the formation of a combined sample consisting of field experiments and experiments counted on the results of modeling are justified. Data uniformity is checked using the Student's criterion. The minimum volume of full-scale tests is determined by the requirement of equality of the amount of Fischer information about the estimated parameter obtained during full-scale tests and at the expense of a priori data A strategy for conducting field experiments is proposed, in which the required quality of evaluating the probability of completing the task is achieved with the minimum possible number of field experiments. At the first stage, a series of experiments with a volume equal to half of the required sample size is performed. At the second stage, the experiments are conducted sequentially with an assessment after each experiment of the requirements for the amount of information about the evaluated parameter and for the uniformity of data. Experiments are terminated when the specified requirements are met, and then a combined sample is formed, which is used to evaluate the probability of the system performing the task. A model example is considered. The estimation of the gain in the number of experiments performed at different probability values was carried out.

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