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 COMPONENT METHOD EXTENSION TO STEEL BEAM‐TO‐BEAM AND BEAM‐TO‐COLUMN KNEE JOINTS UNDER BENDING AND AXIAL FORCES

2005 ◽  
Vol 11 (3) ◽  
pp. 217-224 ◽  
Author(s):  
Kestutis Urbonas ◽  
Alfonsas Daniūnas
Keyword(s):  
Axial Force ◽  
Bending Moment ◽  
Practical Method ◽  
Knee Joints ◽  
Steel Beam ◽  
Component Method ◽  
End Plate ◽  
Axial Forces ◽  
Joint Rigidity

This paper presents an analysis of semi‐rigid beam‐to‐beam end‐plate bolted and beam‐to‐column end‐plate bolted knee joints that are subjected to bending and tension or compression axial force. Usually the influence of axial force on joint rigidity is neglected. According to EC3, the axial load, which is less than 10 % of plastic resistance of the connected member under axial force, may be disregarded in the design of joint. Actually the level of axial forces in joints of structures may be significant and has a significant influence on joint rigidity. One of the most popular practical method permitting the determination of rigidity and strength of joint is the so‐called component method. The extension of the component method for evaluating the influence of bending moment and axial force on the rigidity and strength of the joint are presented in the paper. The numerical results of calculations of rigidity and strength of beam-to-beam and beam-to-column knee joints are presented in this paper as well.

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.

INFLUENCE OF THE SEMI‐RIGID BOLTED STEEL JOINTS ON THE FRAME BEHAVIOUR

2010 ◽  
Vol 16 (2) ◽  
pp. 237-241 ◽  
Author(s):  
Alfonsas Daniūnas ◽  
Kęstutis Urbonas
Keyword(s):  
Axial Force ◽  
Research Work ◽  
Bolted Joints ◽  
Main Attention ◽  
Component Method ◽  
Axial Forces ◽  
Rigid Joints ◽  
Joint Behaviour ◽  
Steel Joints

This research work describes the analysis of steel semi rigid joints that are subjected to bending and tension or compression. The main attention is focussed on the beam‐to‐beam and plate bolted joints. Usually influence of axial force is neglected. In fact, the level of tension or compression of axial force can be significant and has some impact on joint behaviour and on its stiffness and strength characteristics. Nowadays the most powerful method for the estimation of joints characteristics is the component method. The adaptation of the component method for the determination of joints characteristics under bending ant axial forces is shown in the paper. Some numerical results of calculations of steel frameworks are presented in this paper as well (Daniūnas and Urbonas 2008). Santrauka Straipsnyje nagrinejami pusiau standūs mazgai, veikiami lenkiamojo momento ir tempimo ar gniuždymo ašines jegos. Daugiausia demesio skiriama sijos, sujungtos varžtais per galines plokšteles su kita sija, mazgui. Dažniausiai teigiama, kad ašines jegos itaka mazgo elgsenai yra nereikšminga. Iš tikruju gniuždymo ar tempimo ašines jegos dydis gali būti reikšmingas ir daryti svaria itaka mazgo elgsenai, sukamojo standžio ir lenkiamosios galios reikšmems. Populiariausias ir plačiausiai šiuo metu taikomas metodas mazgo charakteristikoms nustatyti yra komponentu metodas. Šiame straipsnyje rodoma, kaip taikomas komponentu metodas nustatyti mazgo, veikiamo lenkiamojo momento ir ašines jegos, charakteristikoms. Pateikiami ir plieniniu reminiu konstrukciju skaičiavimu rezultatai (Daniūnas, Urbonas 2008).

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.

Preliminary Parametric Assessment of a Bolted Endplate Joint under Combined Axial Force and Cyclic Bending Moment

2011 ◽  
Vol 255-260 ◽  
pp. 718-721
Author(s):  
Z.Y. Wang ◽  
Q.Y. Wang
Keyword(s):  
Finite Element Analysis ◽  
Axial Force ◽  
Seismic Design ◽  
Axial Load ◽  
Failure Modes ◽  
Bending Moment ◽  
Element Analysis ◽  
Cyclic Behaviour ◽  
Joint Behaviour ◽  
Steel Joints

Problems regarding the combined axial force and bending moment for the behaviour of semi-rigid steel joints under service loading have been recognized in recent studies. As an extended research on the cyclic behaviour of a bolted endplate joint, this study is performed relating to the contribution of column axial force on the cyclic behaviour of the joint. Using finite element analysis, the deteriorations of the joint performance have been evaluated. The preliminary parametric study of the joint is conducted with the consideration of flexibility of the column flange. The column axial force was observed to significantly influence the joint behaviour when the bending of the column flange dominates the failure modes. The reductions of moment resistance predicted by numerical analysis have been compared with codified suggestions. Comments have been made for further consideration of the influence of column axial load in seismic design of bolted endplate joints.

scholarly journals Axial force redistribution in steel beam with thermal elongation capability increasing in fire

2013 ◽  
Vol XXX (60 (2/13)) ◽  
pp. 189-202
Author(s):  
Mariusz Maślak ◽  
◽  
Małgorzata Snela
Keyword(s):  
Axial Force ◽  
Steel Beam ◽  
In Fire

The Performance of Steel Beam during the Cooling Phase and the Impact of Fire Parameters

2013 ◽  
Vol 404 ◽  
pp. 232-236
Author(s):  
Xiu Ying Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Solid Model ◽  
Steel Beam ◽  
Uniform Load ◽  
Cooling Process ◽  
Internal Forces ◽  
Cooling Phase ◽  
The Impact ◽  
Temperature Heating

In order to study the performance of steel beam in the cooling process, a series of numerical analysis has been carried out in this paper. The solid model of the beam was established firstly using finite element method, the beam was heated and cooled gradually under the certain uniform load, then the internal forces and deformation of the beam were analyzed in the whole fire process. Based on this, the parameters of the highest temperature, heating rate and the cooling rate were changed, and their affect on the beam performance was studied by comparing.

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