scholarly journals Theoretical study on the rotation angle and bearing capacity of beam-to-column composite connections in prefabricated steel frames

2021 ◽  
pp. 103580
Author(s):  
Kang Ma ◽  
Xihao Ye ◽  
Ruoyang Wu ◽  
Haifeng Yu ◽  
Tianjiao Jin
Keyword(s):  
Bearing Capacity ◽  
Theoretical Study ◽  
Rotation Angle ◽  
Steel Frames ◽  
Composite Connections

Effect of Pile and Load Inclination on the Pile Resistance In both Compression and Tension

2014 ◽  
Vol 2 (1) ◽  
pp. 11-29
Author(s):  
Ahmad Jabber Hussain ◽  
Alaa Dawood Salman ◽  
. Nazar Hassan Mohammad
Keyword(s):  
Bearing Capacity ◽  
Inclination Angle ◽  
Theoretical Study ◽  
Pile Installation ◽  
Soil Failure ◽  
Inclined Pile ◽  
Uplift Resistance ◽  
Lift Forces ◽  
Batter Piles ◽  
Pile Resistance

      According to this theoretical study which was about loading of piles under different condition of loading (compression and up-lift forces ) and for deferent pile installation (vertical and inclined pile ) by which it called (positive batter pile ) when the inclination of the load and pile is in the same direction and called (negative batter pile) when the inclination of load is opposite to the pile inclination, and from studying these cases the results of analysis can be summarize in the flowing points: 1-Variation of load inclination on piles effects on the bearing capacity and uplift resistance. It was found that bearing capacity of the piles increase with increasing of load inclination up to the inclination angle (37.5ͦ) which represents the maximum bearing capacity and then the bearing capacity decrease with increasing of load inclination. 2- Variation of batter pile affects the bearing capacity of the pile and up-lift resistance. by which equivalent angle will be used as result between the load and piles inclination and this angle will be used in calculation of piles resistance . 3- It was noticed the shape of soil failure is highly affected by the inclination of pile. The shape of failure for the soil which is in contact with pile and this include (vertical and batter piles) is highly affected by the angle of inclination.

Monotonic Behaviors of Steel Frames with Sandwich Composite Panel Infills: Theoretical and Numerical

2012 ◽  
Vol 193-194 ◽  
pp. 1424-1428
Author(s):  
Miao Liu ◽  
Yan Fei Sun ◽  
C.X. Qiu ◽  
He Tao Hou
Keyword(s):  
Structural Engineering ◽  
Theoretical Study ◽  
Numerical Models ◽  
Steel Frames ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Actual Structure ◽  
Equivalent Strut ◽  
Cross Section Area ◽  
Section Area

Abstract: Analysis of infilled frames is one of the most complicated problems in the structural engineering field. This complication is mainly attributed to the existence of the variety and complex of the infills and the difficulty in modeling the infill-frames interaction. In the present paper, with the aim to study the integral behavior of the single-story single-bay steel frames with sandwich composite panel infills, a proper computational model (the panel is simplified into an equivalent pin-jointed diagonal strut) is proposed. In the theoretical study, both of the panels and steel frames are assumed to be in the linear elastic state for simplicity’s sake, and then the cross-section area of the equivalent strut is obtained by imposing the initial lateral stiffness of actual structure equal to that of simplified model. As a support of the discussion, several numerical models under monotonic lateral loadings are performed by software ABAQUS, in order to verify the theoretical analysis. Finally, results from theoretical study and numerical modeling are compared, which give a satisfactory correlation between them.

scholarly journals INFLUENCE OF SCREENING BLOCK SUPPORTING WAY ON THE BEHAVIOUR OF A SOLID PARTICLE ON AN OSCILLATING SURFACE

2016 ◽  
Vol 21 (3) ◽  
Author(s):  
MOŞNEGUŢU EMILIAN ◽  
NEDEFF VALENTIN ◽  
BÂRSAN NARCIS ◽  
CHIŢIMUŞ ALEXANDRA-DANA ◽  
RUSU DRAGOŞ
Keyword(s):  
Solid Particle ◽  
Theoretical Study ◽  
Rotation Angle ◽  
Reaction Force ◽  
Physical Parameters ◽  
Working Surface ◽  
Mechanical Separation ◽  
Screening Device ◽  
Tie Rods ◽  
Moving Speed

<p>This article shows a study aiming to identify the influence carried out by the supporting way of the working surface in the case of plane oscillating screening device, over the behavior of a solid particle. In order to achieve this, a theoretical study has been conducted by using a simulation program, Working Model 2D, within which two ways of supporting the screening block have been conceived: the working surface supported by tie-rods, and the surface suspended on tie-rods. Following the simulation, a series of physical parameters has been determined: the trajectory followed by the solid particle; the circuit of the solid particle during its movement on the working surface; the acceleration of the solid particle and the reaction force occurred between the solid particle and the working surface. Following the analysis of resulting values it may be noted that the best way to support the working surface, as far as the efficiency of mechanical separation is concerned, according to width and thickness of the solid particle, is obtained in the case where the working surface is supported by tie-rods, since the running time of the working surface is the highest and it is 4.12 seconds, value generating the high average moving speed; the particle’s rotation angle is from -2 rad to +4.8 rad, having as a result the amplest possible rotation.</p>

Research of Fire Resistance of Elements of Steel Frames of Industrial Buildings

2021 ◽  
Vol 1038 ◽  
pp. 506-513
Author(s):  
Viktor Hvozd ◽  
Eugene Tishchenko ◽  
Andriy Berezovskyi ◽  
Stanislav Sidnei
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Mathematical Models ◽  
Bearing Capacity ◽  
Fire Resistance ◽  
Limit State ◽  
Steel Frames ◽  
Steel Structures ◽  
Computational Experiments ◽  
Industrial Buildings

The article considers and analyses the methods by which it is possible to carry out research to determine the fire resistance of elements of steel frames of industrial buildings. It is determined that it is expedient to use the means of computational fluid dynamics, which has no limitations due to the high cost, complexity, environmental friendliness and complexity in comparison with real experiments. In order to conduct the most reliable computational experiments, mathematical models of temperature and mechanical reaction to the thermal effect of fire were created, taking into account the equations of thermal conductivity, systems of differential equations of stress-strain state of solids in their numerical implementation based on the finite element method. The solution of mathematical models was carried out using computational fluid dynamics, which describes the process of heat and mass transfer in test fire furnaces during the determination of fire resistance of steel structures. According to the results of computational experiments it is shown that the limiting state of loss of bearing capacity of vertical and horizontal structures occurs due to the formation of a zone of plastic deformations taking into account the associative theory of plasticity. According to the results of computational experiments, the dependence of the limit of fire resistance on the level of applied load to structures, which is close to linear, was revealed. Based on the obtained dependences and the corresponding graphs, a technique is developed based on the use of maximum deformations of the elements with the corresponding fixation of the limit state on the loss of fire resistance in terms of bearing capacity by bending this curve.

INFLUENCE OF PANEL ZONE SIZES ON ULTIMATE BEARING CAPACITY OF H-SHAPED STEEL FRAMES

2019 ◽  
Vol 28 (4) ◽  
pp. 532-541
Author(s):  
Yan Zhang ◽  
Huijuan Liu ◽  
Yuhong Yang ◽  
Enhe Bao
Keyword(s):  
Bearing Capacity ◽  
Steel Frames ◽  
Ultimate Bearing Capacity ◽  
Panel Zone
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