Temperature Field Calculation and Analysis within Steel Tube Reinforced Columns

2011 ◽  
Vol 243-249 ◽  
pp. 5089-5093 ◽  
Author(s):  
Lei Xu ◽  
Yu Bin Liu
Keyword(s):  
Temperature Field ◽  
Theoretical Models ◽  
Steel Tube ◽  
Area Ratio ◽  
Core Area ◽  
Field Calculation ◽  
Steel Tubes ◽  
Finite Element Program ◽  
Element Program ◽  
Rising Time

Theoretical models to calculate the temperature field steel tubes reinforced columns are proposed by finite element program in this paper. The theoretical results are validated by test results, and they have a good agreement. Using the theoretical models, the influencing laws of temperature rising time; section perimeter; steel reinforcement ratio and sectional core area ratio on temperature field are further discussed. It has been found that the surface temperatures of steel tube reinforced columns increase obviously with temperature rising time, and the temperatures of steel tubes and core concrete increase slowly. The effects of sectional dimension and sectional core area ratio on temperature field are significant, but steel ratio has very little effect on temperature both of steel tube and of sectional center. These achievements make it possible to study further theoretical study on the mechanic performance of steel tube reinforced concrete columns in fire.

scholarly journals Temperature Field Calculation and Analysis within Steel Tube Reinforced Columns

2012 ◽  
Vol 6 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Lei Xu ◽  
Jiangang Sun
Keyword(s):  
Temperature Field ◽  
Theoretical Method ◽  
Steel Tube ◽  
Area Ratio ◽  
Field Analysis ◽  
Core Area ◽  
Field Calculation ◽  
Element Analysis ◽  
In Fire ◽  
Rising Time

The temperature field analysis method of steel tube reinforced columns under fire by finite element analysis software ABAQUS is proposed in this paper. The theoretical method is validated by tests, and the calculated results agree well with those of tests. On the basis of that, the influencing laws of temperature rising time; section perimeter; steel reinforcement ratio and sectional core area ratio on temperature field are discussed. It has been found that the surface temperatures of steel tube reinforced columns increase obviously with temperature rising time, and the temperatures of steel tubes and core concrete increase slowly. The effects of section size and sectional core area ratio on temperature field are significant, but steel ratio has very little effect on temperature both of steel tube and of sectional center. These achievements make it possible to study further theoretical study on the mechanic performance of steel tube reinforced concrete columns in fire.

Numerical Analysis on the Temperature Distribution of Steel Tube Reinforced Concrete Columns Subjected to 3-Side Heating

2012 ◽  
Vol 170-173 ◽  
pp. 2657-2660
Author(s):  
Lei Xu ◽  
Yu Bin Liu
Keyword(s):  
Temperature Field ◽  
Concrete Columns ◽  
Theoretical Models ◽  
Heating Time ◽  
Steel Tube ◽  
Area Ratio ◽  
Core Area ◽  
Temperature Fields ◽  
Nonlinear Fem ◽  
Section Surface

The temperature fields of steel tube filled concrete columns are analyzed by a nonlinear FEM model in the paper. The theoretical results are validated by relative test results, and a good agreement is obtained. Using the theoretical models, the influencing laws of temperature rising time; section perimeter; steel reinforcement ratio and sectional core area ratio on temperature field of STRC subjected to 3-side fire are further discussed. By above parametric analysis, it has been found that the effects of heating time, sectional dimension and sectional core area ratio on temperature field are significant, but steel ratio has very little effect on temperature both of steel tube and of section surface.

Finite Element Analysis on the Temperature Field within Steel Tube Reinforced Columns

2010 ◽  
Vol 163-167 ◽  
pp. 2089-2093 ◽  
Author(s):  
Lei Xu ◽  
Jian Gang Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Field ◽  
Theoretical Method ◽  
Steel Tube ◽  
Area Ratio ◽  
Field Analysis ◽  
Core Area ◽  
Element Analysis ◽  
Section Size

The temperature field analysis method of steel tubes reinforced columns under fire by finite element analysis software ABAQUS is proposed in this paper. The theoretical method is validated by tests, and the calculated results agree well with those of tests. On the basis of that, the influencing laws of section perimeter; steel reinforcement ratio and sectional core area ratio on temperature field are discussed. It has been found that the effects of section size and sectional core area ratio on temperature field are significant, but steel ratio has very little effect on temperature both of steel tube and of sectional center. These achievements make it possible to study further theoretical study on the fire resistance of steel tube reinforced concrete columns.

Finite Element Analysis on the Bearing Capacity of Tube-Plate Joint with Different Width-Thickness Ratio

2012 ◽  
Vol 204-208 ◽  
pp. 1224-1228
Author(s):  
Jun Fen Yang ◽  
Yi Liang Peng ◽  
Xia Bing Wei ◽  
Jin Bo Cui
Keyword(s):  
Experimental Investigation ◽  
Finite Element ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Thickness Ratio ◽  
Deformation Condition ◽  
Tube Plate ◽  
Element Analysis ◽  
Finite Element Program ◽  
Element Program

Tube-plate joint is a frequently-used joint type in steel-tube tower, but the theoretical analysis and experimental investigation on tube-plate joint are absent both at home and abroad. In this paper, the ANSYS finite element program was used to simulate the bearing capacity and deformation condition of tube-plate joint with 1/2-stiffening ring. Eight calculation models were designed, and the width-thickness ratio was changed by changing the width or thickness of stiffening ring. The results indicate that the influence of different width-thickness ratio on tube-plate joint bearing capability is significant. By increasing the width or increasing the thickness of stiffening rings to improve the bearing capacity of the joint is a very effective way.

Structural behavior of recycled aggregates concrete filled steel tubular columns

2017 ◽  
Vol 8 (1) ◽  
pp. 17 ◽  
Author(s):  
Boshra Eltaly ◽  
Ahmed Bembawy ◽  
Nageh Meleka ◽  
Kameel Kandil
Keyword(s):  
Finite Element ◽  
Steel Tube ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Experimental Program ◽  
Element Analysis ◽  
Finite Element Program ◽  
Tubular Columns ◽  
Coarse Aggregates ◽  
Element Program

This paper presents an experimental and numerical investigation to determine the behavior of steel tubular columns filled with recycled aggregates concrete up to failure under constant axial compression loads. The experimental program included two steel tube columns, four recycled concrete columns and eight composite columns filled with different types of recycled coarse aggregates (granite and ceramic). Different percentages of recycled coarse aggregates: 0, 25 and 50 of the percentage of the coarse aggregates (dolomite) were used. The results of the numerical model that was employed by the finite element program, ANSYS, were compared with the experimental results. The results of the experimental study and the finite element analysis were compared with the design equations using different national building codes: AISC1999, AISC2005 and EC4. The results indicated that the recycled aggregates concrete infill columns have slightly lower but comparable ultimate capacities compared with the specimens filled with normal concrete.

Analysis of Large-Span Steel Concrete Railway Arch Bridge Suspender Tension

2013 ◽  
Vol 361-363 ◽  
pp. 1259-1263 ◽  
Author(s):  
Jia Lin Xu
Keyword(s):  
Bending Moment ◽  
Internal Force ◽  
Steel Tube ◽  
Force Balance ◽  
Initial Tension ◽  
Finite Element Program ◽  
Arch Bridge ◽  
Reverse Sequence ◽  
Element Program ◽  
Force Calculation

In this paper the concrete-filled steel tube concrete arch bridge as the research object, through the finite element program MIDAS, analyzes the internal force of the whole bridge, determined the distribution of internal force and the most unfavorable position; Using the force balance method, taking the reasonable stress of the bending moment status to control goals, determines the boom of the bridge as the condition of reasonable internal force; Use fall down method, according to the reverse sequence in order to cut the boom, each cut as a model for internal force calculation and analysis, get the next will be cut derrick's internal force, its value is the order construction boom of the initial tension.

VIV Analysis of Deep Water Steel Catenary Riser Within Pull Tube

2013 ◽  
Author(s):  
Lun Qiu ◽  
Li Lee
Keyword(s):  
Cross Flow ◽  
Software Tool ◽  
Steel Tube ◽  
Careful Consideration ◽  
Single Chain ◽  
Tube System ◽  
Finite Element Program ◽  
Steel Catenary Riser ◽  
Entire Structure ◽  
Element Program

The method of pulling a steel catenary riser (SCR) through a steel tube (termed as a pull tube) is common practice for deepwater riser tie back applications. Vortex-induced vibration (VIV) of such a system is complex. VIV analysis programs, such as Shear7 [1], are suitable only for a single, chain-like structure. The application of such a software tool in VIV design of the SCR-pull tube system requires careful consideration of a number of structural and hydrodynamic factors. This paper presents a methodology for VIV analysis of the combined structural system of the SCR with the pull tube. Firstly, the entire SCR-pull tube system is modeled with the finite element program Flexcom [2]. The modes are then calculated for the entire structure with program Modes [3]. Afterwards, the structural nodes are rearranged for VIV analysis with Shear7. The pull tube is secured on the platform through a number of guides on the truss structure of the hull. The diameter of the pull tube is much larger than that of the SCR, and the pull tube is much stiffer in bending than the SCR is. If the entire structure is analyzed with Shear7, the mode for the pull tube (a mode involving a large motion of the pull tube section), which is very high in order, would be embedded in the analysis. It makes sense to single out the pull tube mode for study as if it is the first mode. A computer program, named as V-Span [4] for subsea span VIV analysis, is used to analyze both in-line and cross-flow VIV of the pull tube. A numerical example is presented to demonstrate this methodology. This is a deepwater SCR, which has a diameter of 9 inches. The water depth is 6,300 ft. The pull tube is 640 feet long and 20 inch in diameter. Both the loop-eddy and background currents are analyzed. The fatigue damage resulted from both in-line and cross-flow VIV is estimated.

Temperature Control of Massive Concrete for Construction of Pier’s Base

2011 ◽  
Vol 71-78 ◽  
pp. 4134-4137
Author(s):  
Ya Xun Yang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Temperature Control ◽  
Calculation Result ◽  
Control Program ◽  
Hydration Heat ◽  
Finite Element Program ◽  
Massive Concrete ◽  
Concrete Temperature ◽  
Element Program

For the hydration heat generated by the massive concrete during the construction of the pier’s base, the methods and operation processes of temperature control are presented in this article, using the finite element program MIDAS analyze the massive concrete temperature field of the hydration heat during the construction of the base. Besides, temperature control program for the construction of massive concrete, simulation of the calculation result and controlling calculation following the process of the construction compared with the data of temperature monitoring are introduced. The result of analysis and calculation could be a reference for the similar construction.

Research of Explosive Welding: Numerical Simulation and Analysis

2013 ◽  
Vol 668 ◽  
pp. 560-564 ◽  
Author(s):  
Xiao Xu Wang ◽  
Jin Xiang Wang ◽  
Yong He
Keyword(s):  
Temperature Field ◽  
Explosive Welding ◽  
Propagation Distance ◽  
Physical Parameters ◽  
Finite Element Program ◽  
Welding Temperature ◽  
Heat Transfer Theory ◽  
Particle Hydrodynamics ◽  
Element Program ◽  
Wavy Interface

To improve understanding of explosive welding and relate the effect of the process variables on the physical parameters, the smooth particle hydrodynamics (SPH) method in the LS-DYNA 12.0 finite element program was adopt to simulate the process of two-layer steel explosive welding. Temperature field near the stagnation point was calculated according to the work-heat transfer theory. Finally, the formation mechanism of the interface wave was analyzed under the condition that strain field, temperature field etc. were considered. The results show that: the phenomenon of jetting and the interfacial waves observed in explosive welding were quite well reproduced in these simulations; the changing collision angle with propagation distance is directly responsible for the change in interface morphology from wavy to smooth at the welding front; the maximum stress ,strain and temperature are localised at the wavy interface zone; the maximum temperatures near the interface will be high enough under proper conditions and this will be helpful for the formation of the jet and the wavy interface.

Numerical Analysis of RPC-Filled Circular Steel Tube Columns

2011 ◽  
Vol 291-294 ◽  
pp. 396-400 ◽  
Author(s):  
Yan Wang ◽  
Guan Yuan Zhao
Keyword(s):  
High Performance ◽  
Steel Tube ◽  
Axial Loads ◽  
Finite Element Program ◽  
Circular Steel Tube ◽  
Element Program ◽  
Loading Modes ◽  
Reactive Powder ◽  
Relationship Of ◽  
Force Displacement

Reactive Powder Concrete(RPC) is a cementitious material that exhibits high performance properties. Brittle failure mode usually appears when it is subjected to high or complicated stress. The fragility performance of RPC can be great improved if efficient confinement is provided. In this paper, four RPC-filled steel tube stub columns under axial loads were analyzed using the finite element program ABAQUS. Two different axially loading modes were considered. The analysis results were compared with the results of the tests. It was found that the FEM models can predict the force-displacement relationship of such columns with acceptable accuracy.

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