scholarly journals EVALUATION OF LOAD-BEARING CAPACITY OF THE STEEL CONSTRUCTION JOINTS ON THE BASIS OF COMPONENT METHOD

2021 ◽  
Vol 1 (161) ◽  
pp. 19-24
Author(s):  
Y. Solodovnyk ◽  
V. Riumin ◽  
V. Nikichanov
Keyword(s):  
Load Capacity ◽  
Design Procedure ◽  
Design Codes ◽  
Calculation Algorithm ◽  
Yield Line ◽  
Component Method ◽  
Capacity Calculation ◽  
Complex Phenomena ◽  
Steel Joints ◽  
Connection Design

Connections are essential in every kind of steel constructions. Structure is a constructed assembly of joints separated by members which implies the importance of connections. Three basic parameters describe the behavior of connections: strength, stiffness and ductility, and the mechanical behavior of steel joint in those terms are complex phenomena. It must be said that absence in current Ukrainian design codes rules for the load capacity calculation of steel constructions connections led to some difficulties in project decisions. On the basis of component method, which lay in the EC3 design codes load capacity estimation of beam to column connection was made. According to component method beam to column connection divided into basic components. EN 1993 -1-8 provides a good overview of different components. Most important components for bolted steel joints are the plates and bolts which both are considered by the design of a T-stub through the “Equivalent T-stub in tension”. The procedure of load capacity calculation used yield line formulations to determine resistance of the following basic components: column flange in bending, end plate in bending, column flange in bending, column web in tension, column web in compression, beam flange in compression. Failure by this method is described by yield-line models depending on geometry of plates and bolts. Obtained analytical results were compared with the results obtained by means of specialized software and it shown their adequacy. It must be noted that presented in EC3 calculation algorithm of beam to column connection is time consumable for domestic designer also designer must have knowledge about features of connection design in countries of EC. The choice of design procedure depends on the time effort and thereby to the designer preferences.

scholarly journals The axial force influence on the flexibility of steel joints subject to bending under fully developed fire conditions

2014 ◽  
Vol 13 (3) ◽  
pp. 251-258
Author(s):  
Mariusz Maślak ◽  
Małgorzata Snela
Keyword(s):  
Quantitative Evaluation ◽  
Axial Force ◽  
Knee Joints ◽  
Steel Beam ◽  
Significant Modification ◽  
Calculation Algorithm ◽  
Component Method ◽  
Internal Forces ◽  
Steel Joints ◽  
Fire Conditions

The axial force qualitative influence as well as its quantitative evaluation on the behaviour of the flexible steel beam-to-beam and column-to-column knee joints subject to bending under fire conditions are assessed and discussed in detail. The proposed calculation algorithm is based on the generalization of classical component method. The essential effect of such axial force is not only the correction of internal forces applied to particular joint components, but also the significant modification of their strain conditions.

scholarly journals Design and Analysis of an Aerostatic Pad Controlled by a Diaphragm Valve

Lubricants ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 47
Author(s):  
Federico Colombo ◽  
Luigi Lentini ◽  
Terenziano Raparelli ◽  
Andrea Trivella ◽  
Vladimir Viktorov
Keyword(s):  
Sensitivity Analysis ◽  
High Precision ◽  
Load Capacity ◽  
Design Procedure ◽  
Maximum Load ◽  
Air Gap ◽  
Diaphragm Valve ◽  
Compensation Methods ◽  
Aerostatic Bearings ◽  
Gap Height

Because of their distinctive characteristics, aerostatic bearings are particularly suitable for high-precision applications. However, because of the compressibility of the lubricant, this kind of bearing is characterized by low relative stiffness and poor damping. Compensation methods represent a valuable solution to these limitations. This paper presents a design procedure for passively compensated bearings controlled by diaphragm valves. Given a desired air gap height at which the system should work, the procedure makes it possible to maximize the stiffness of the bearing around this value. The designed bearings exhibit a quasi-static infinite stiffness for load variation ranging from 20% to almost 50% of the maximum load capacity of the bearing. Moreover, the influence of different parameters on the performance of the compensated pad is evaluated through a sensitivity analysis.

Analysis of Aluminium Beam-to-Column Joints by the Component Method: Existing Studies and Research Needs

2016 ◽  
Vol 710 ◽  
pp. 409-414 ◽  
Author(s):  
Gianfranco De Matteis ◽  
Giuseppe Brando
Keyword(s):  
Current Knowledge ◽  
Component Method ◽  
The Past ◽  
Research Fields ◽  
Numerical Studies ◽  
Current State ◽  
Moment Resisting ◽  
New Research ◽  
Steel Joints

This paper aims at providing an overview on the current state of the art and on possible future developments concerning the component method implementation for the classification of beam-to-column joints belonging to aluminum moment resisting frames.After a brief discussion on the component method theoretical bases, developed in the past to give a feasible calculation procedure for steel joints, recent experimental and numerical studies, carried out for investigating some aluminum components, are presented and discussed. In particular strengths and weaknesses of the current knowledge are put into evidence, also in light of the peculiarities that make aluminum alloys different from steel. The launch of new research fields, aimed at pursuing an update of the current codes dealing with aluminum structures, is therefore proposed.

New Bolted End-Plate Connection Design

2014 ◽  
Vol 1025-1026 ◽  
pp. 878-884
Author(s):  
Jong Wan Hu ◽  
Jun Hyuk Ahn
Keyword(s):  
Design Procedure ◽  
High Strength ◽  
Limit States ◽  
Moment Connections ◽  
End Plate ◽  
Plastic Strength ◽  
Plate Connections ◽  
Plate Connection ◽  
Connection Design

This paper is principally performed to survey end-plate connection are described in the next part based on ideal limit states. The determination of end-plate based on the full plastic strength of the steel beam in accordance with 2001 AISC-LRFD manual and AISC/ANSI 358-05 Specifications. The bolted connections considered herein were performed to include the end-plate component of moment connections. This study is intended to investigate economic design for end-plate connections. In addition, the proposed end-plate model is evaluated by comparing the required factored bolt strength. The end-plates using 8 high strength bolts with wider gages demonstrated this design. The equations belonging to the step-by-step design procedure are described based on complete proving of design. Finally, new design methodology is applied to end-plate connections suggested in this study.

Comparative Analysis of Sino-Foreign Wind Load Standard

2014 ◽  
Vol 1079-1080 ◽  
pp. 187-190
Author(s):  
Chun Li
Keyword(s):  
Comparative Analysis ◽  
Load Capacity ◽  
Chinese American ◽  
Electrical Equipment ◽  
Wind Load ◽  
Design Codes ◽  
Foreign Experience ◽  
The Difference ◽  
At Home

It has great significanceto conduct comparative analysis on wind load criteria at home and abroad forimproving anti-wind load capacity of the structure. A brief overview of Chinese,American, European and Australia wind load design codes of structure ispresented in this paper. The difference among these wind load codes, theadvantages and disadvantages of Chinese related standards are pointed out.Through comparison of wind load standard between Chinese code and otherstandards, through learning from foreign experience about the determination ofwind load criteria, improvement of wind load of electrical equipment andstandard revised recommendations are provided.

Ultimate loading evaluation of rubber springs used in engine suspension

2003 ◽  
Vol 217 (4) ◽  
pp. 287-290 ◽  
Author(s):  
R K Luo ◽  
W X Wu ◽  
W J Mortel
Keyword(s):  
Computer Aided Design ◽  
Load Capacity ◽  
Integrated Design ◽  
Design Procedure ◽  
Fe Analysis ◽  
Load Test ◽  
Customer Requirements ◽  
Three Dimensional Model ◽  
Computer Aided ◽  
Prototype Testing

Rubber springs are widely used in industry as antivibration components giving many years of service. The Metacone range of mountings is well established as an antivibration mounting, suitable for engine suspension, where vertical and horizontal movement is controlled within the design. The Metacone mountings manufactured at Trelleborg-AVS are designed for maximum load capacity combined with a large deflection in an axial direction. An integrated design procedure (including material and prototype testing and finite element (FE) analysis) has been carried out to evaluate the component unit to meet customer requirements. The geometry data were imported from a computer aided design (CAD) system to a computer aided engineering (CAE) system. A solid three-dimensional model with appropriate mesh was generated for FE analysis. Detailed stress analysis was conducted, and conclusions from the FE results suggested that the assembly of the Metacone mounting unit is safe for prototype testing. The ultimate load test on the prototype unit was carried out in the present authors' laboratory, and the result has shown that the component has met customer requirements. Now the products have been manufactured and delivered.

Pitting Load Capacity of Helical Gears

2007 ◽  
Author(s):  
Bernd-Robert Ho¨hn ◽  
Peter Oster ◽  
Gregor Steinberger
Keyword(s):  
Calculation Method ◽  
Load Distribution ◽  
Load Capacity ◽  
Test Results ◽  
Calculation Methods ◽  
Helical Gears ◽  
Capacity Calculation ◽  
Overlap Ratio ◽  
Tooth Flank

In experimental analyzes the pitting load capacity of case carburized spur and helical gears is determined in back-to-back test rigs. The research program with one type of spur and 8 types of helical gears includes tests for the determination of influences of varying load distribution, overlap ratio and transmission ratio. The test results are presented and evaluated on the basis of the pitting load capacity calculation methods of ISO 6336-2/DIN 3990, part 2. A new DIN/ISO compatible calculation method for pitting load capacity is presented. This new calculation method comprehends helical gears more adequate than ISO 6336-2 / DIN 3990, part 2 and has the possibility to consider tooth flank modifications. The new calculation method is applied on test results and gears of a calculation study. It shows better accordance with the experimental test results than the present ISO 6336-2 / DIN 3990, part 2.

scholarly journals PROCEDURE FOR CALCULATION AND DESIGN OF SPHERICAL ROLLER GEARS WITH DOUBLE-ROW PINION

2021 ◽  
Vol 2 (55) ◽  
pp. 18-24
Author(s):  
E.S. Lustenkova ◽  
Keyword(s):  
Load Capacity ◽  
Maximum Load ◽  
Maximum Efficiency ◽  
Efficiency Coefficient ◽  
Material Consumption ◽  
Main Criterion ◽  
Calculation Algorithm ◽  
Double Row ◽  
Wide Range ◽  
Fatigue Endurance

The article presents a method for calculating and designing spherical roller gears with a double-row pinion. The studied gears are analogs of planetary gears with a double-wheel pinion. They make it possible to implement a wide range of gear ratios. The advantages of spherical roller gears include small dimensions, low material consumption, and layout properties. A special feature of the proposed calculation algorithm is the search for optimal geometric gears parameters according to the criteria of maximum efficiency coefficient taking into account maximum load capacity for a given maximum radial dimensions. The main criterion of strength is fatigue endurance. The method includes design and verification calculations. It makes it possible to develop the small-sized speed reducers for low-speed drives for various purposes.

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