Numerical analyses of semi-rigid joints subjected to bending with and without axial force

2013 ◽  
Vol 90 ◽  
pp. 13-28 ◽  
Author(s):  
Huihuan Ma ◽  
Feng Fan ◽  
Gengbo Chen ◽  
Zhenggang Cao ◽  
Shizhao Shen
Keyword(s):  
Axial Force ◽  
Numerical Analyses ◽  
Rigid Joints

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).

scholarly journals Analytical and numerical research of equivalent stabilizing force of stiffened truss chords

2019 ◽  
Vol 262 ◽  
pp. 09003
Author(s):  
Antoni Biegus ◽  
Dariusz Czepiżak
Keyword(s):  
Axial Force ◽  
Geometric Nonlinearity ◽  
Central Zone ◽  
3D Models ◽  
Numerical Analyses ◽  
Support Zone ◽  
Is Research ◽  
Axial Forces ◽  
Numerical Research ◽  
Parametric Analyses

The aim of this paper is research of the equivalent stabilizing forces of the braced top flange of the truss. The study takes into account the initial bow imperfection e0 of the braced top flange and the im-perfection consisting in a twist of the roof girder’s principal plane by angle ϕ0(x). Moreover, axial force N3(x) in the top flange of the truss is assumed to be longitudinally parabolically variable. The values of the axial forces is: Nsupp in the support zone of the truss and Nspan in the central zone of truss. As part of this study parametric analyses of the equivalent stabilizing forces and the stress of the bracings depending on axial forces Nsupp and Nspan in the braced member were carried out. The results are compared with the results of numerical analyses of 3D models taking the geometric nonlinearity of the structure into account.

scholarly journals Analysis of Ledger-Stand Joints in the Aluminum Modular Scaffold

2017 ◽  
Vol 63 (1) ◽  
pp. 17-31 ◽  
Author(s):  
E. Błazik-Borowa ◽  
M. Pieńko ◽  
A. Robak ◽  
A. Borowa ◽  
P. Jamińska-Gadomska
Keyword(s):  
Linear Relationship ◽  
Numerical Analyses ◽  
Joint Modelling ◽  
Modular Scaffolds ◽  
Rigid Joints ◽  
Engineering Practices ◽  
Displacement Measurements

AbstractThis paper concerns an approach to model the ledger-stand joints of modular scaffolds. Based on the analysis of the working range of the ledger (represented by a linear relationship between load and displacement), two models of the ledger-stand joint are analysed: first - with flexibility joints and second - with rigid joints and with a transition part of lower stiffness. Parameters are selected based on displacement measurements and numerical analyses of joints, then they are verified. On the basis of performed research, it can be stated that both methods of joint modelling recommended in this paper, can be applied in engineering practices.

MULTIPLE-SCALE AND NUMERICAL ANALYSES FOR THE NONLINEAR OSCILLATIONS OF A GAS BUBBLE SURROUNDED BY A MAXWELL'S FLUID

2019 ◽  
Vol 46 (3) ◽  
pp. 261-275
Author(s):  
César Yepes ◽  
Jorge Naude ◽  
Federico Mendez ◽  
Margarita Navarrete ◽  
Fátima Moumtadi
Keyword(s):  
Nonlinear Oscillations ◽  
Multiple Scale ◽  
Numerical Analyses ◽  
Gas Bubble

Development and testing of rolling cutter bit with a new arrangement of teeth on the balls

2020 ◽  
pp. 60-68
Author(s):  
V. A. Pyalchenkov ◽  
D. V. Pyalchenkov
Keyword(s):  
Axial Force ◽  
Axial Load ◽  
Vertical Line ◽  
Ball Joint ◽  
Line Passing

Research has found that the axial load applied to the bit is distributed unevenly along the crowns of the balls. The middle crowns are the busiest. The value of the axial force perceived by a separate ring is associated with the deformation of the details of the ball joint. You can reduce the uneven loading of crowns by shifting them along the ball along the radius of the bit, placing them so that the vertical line passing through the center of the lower ball of the lock bearing passes through the middle of the gap between the crowns of neighboring balls. The bits with the new option of placing the teeth on the balls were tested on the stand and in industrial conditions. For the bits of this design, the axial load was distributed more evenly over the crowns, which allowed increasing the efficiency of their work.

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