Observation and Theoretical Analysis of the Temperature Field on the Cross Section of Concrete Filled Steel Tubes Arch Bridge Rib

ICCTP 2009 ◽  
2009 ◽  
Author(s):  
Hang Sun ◽  
Hongfei Sheng ◽  
Yan Li ◽  
Jianglong Li
Keyword(s):  
Temperature Field ◽  
Theoretical Analysis ◽  
Cross Section ◽  
Steel Tubes ◽  
Arch Bridge ◽  
The Cross ◽  
Concrete Filled Steel Tubes

CONCRETE-FILLED TUBULAR COLUMNS: PART 1 — CROSS-SECTION ANALYSIS

2004 ◽  
Vol 04 (04) ◽  
pp. 459-478 ◽  
Author(s):  
V. GAYATHRI ◽  
N. E. SHANMUGAM ◽  
Y. S. CHOO
Keyword(s):  
Cyclic Loading ◽  
Cross Section ◽  
Uniaxial Stress ◽  
Steel Tubes ◽  
Cross Sectional ◽  
Tubular Columns ◽  
Fiber Analysis ◽  
The Cross ◽  
Interaction Curves ◽  
Concrete Filled Steel Tubes

A fiber-based approach is adopted to study the cross-sectional behavior of concrete-filled steel tubes subjected to monotonic and cyclic loading. Constitutive behavior of the cross-section is formulated by explicitly dividing the section into fibers, and uniaxial stress–strain rules for steel and concrete are defined. Interaction curves, Moment–Thrust–Curvature (M–P–φ) relations and Moment–Thrust–Strain (M–P–ε) relations are developed for circular and box-shaped in-filled sections based on fiber analysis. A fiber model is also developed to describe the nonlinear response of concrete-filled steel tubes subjected to cyclic loading. M–P–φ relations are developed for arbitrary loading histories using this simple yet reliable approach. Results are compared with the numerical and experimental data available in published literature, and the accuracy of the proposed model is thus ascertained.

scholarly journals Validation of Welding Simulations Using Thermal Strains Measured with DIC

2011 ◽  
Vol 70 ◽  
pp. 129-134 ◽  
Author(s):  
Maarten De Strycker ◽  
Pascal Lava ◽  
Wim Van Paepegem ◽  
Luc Schueremans ◽  
Dimitri Debruyne
Keyword(s):  
Residual Stresses ◽  
Cross Section ◽  
Circular Cross Section ◽  
Welding Process ◽  
Weld Bead ◽  
Image Correlation ◽  
Steel Tubes ◽  
Element Analysis ◽  
Strain Evolution ◽  
The Cross

Residual stresses can affect the performance of steel tubes in many ways and as a result their magnitude and distribution is of particular interest to many applications. Residual stresses in cold-rolled steel tubes mainly originate from the rolling of a flat plate into a circular cross section (involving plastic deformations) and the weld bead that closes the cross section (involving non-uniform heating and cooling). Focus in this contribution is on the longitudinal weld bead that closes the cross section. To reveal the residual stresses in the tubes under consideration, a finite element analysis (FEA) of the welding step in the production process is made. The FEA of the welding process is validated with the temperature evolution of the thermal simulation and the strain evolution for the mechanical part of the analysis. Several methods for measuring the strain evolution are available and in this contribution it is investigated if the Digital Image Correlation (DIC) technique can record the strain evolution during welding. It is shown that the strain evolution obtained with DIC is in agreement with that found by electrical resistance strain gauges. The results of these experimental measuring methods are compared with numerical results from a FEA of the welding process.

Numerical Simulation on Temperature Field of CFST Member under Solar Radiation

2011 ◽  
Vol 354-355 ◽  
pp. 1241-1244
Author(s):  
Yan He ◽  
Man Ding ◽  
Qian Zhang
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Solar Radiation ◽  
Cross Section ◽  
Temperature Difference ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
Nonlinear Temperature ◽  
The Cross

In this paper the temperature field of Concrete Filled Steel Tube (CFST) member under solar radiation is simulated. The results show that temperature distribution caused by solar radiation is nonlinear over the cross-section of CFST member, and it is significantly varied with time and sections, the largest nonlinear temperature difference is over 26.3°C.

scholarly journals Stationary temperature field in multi-layered rods with discontinuous of cross section width

Vestnik MGSU ◽  
2019 ◽  
pp. 12-21
Author(s):  
Andrey V. Mishchenko
Keyword(s):  
Temperature Field ◽  
Heat Flow ◽  
Cross Section ◽  
Fourier Method ◽  
Temperature Fields ◽  
Correction Function ◽  
Two Dimensional ◽  
Stationary Temperature Field ◽  
Nonlinear Distortions ◽  
The Cross

Introduction. Presents a method for modeling a two-dimensional stationary temperature field in a layered rod. The peculiarity of the structure of the rod is the presence of discontinuity of the width of the cross section in the direction of heat flow and multilayer. Identification of the temperature field in such rods is a necessary step in solving the problem of thermoelasticity. The relevance of the problem lies in the development of analytical methods for analysis layered rods of complex geometric shape with thermal effects, with acceptable computational complexity and necessary accuracy. Materials and methods. For a multilayer rod, a method for constructing an approximate solution of the Dirichlet stationary heat conduction problem with a transverse heat flow direction is considered. Within each layer, the temperature distribution function is represented as a sum of two functions. The first function, linear in the direction of the heat flow, reflects the exact solution of the problem for a rectangular layered section. The second function is the correction nonlinear function of two variables. It describes the nonlinear distortions of the temperature field due to the presence of discontinuities in the width of the cross section. The correction function, according to the Fourier method, is represented as a product of a given coordinate function and the sum of the sought amplitudes caused by the width breaks. The functions of the effect of breaking the width on temperature fields in adjacent layers are introduced. An approximate formulation of the Dirichlet problem with integral conjugation conditions on interlayer boundaries is formulated. Results. The parameters of the stationary temperature field were calculated for a seven-layer section of a T-shaped form with alternating layers of carbon and steel. Testing the results of the Ansys program showed good qualitative and quantitative correspondence of two-dimensional temperature fields. Conclusions. The obtained solution satisfactorily describes the temperature field in the cross section of a layered rod in the vicinity of its geometric features. The method is characterized by acceptable laboriousness and accuracy suitable for solving the problem of thermoelasticity of a layered rod.

scholarly journals Analysis of Temperature and Humidity Distribution and Corrosion Effect on Suspender of Arch Bridge

2021 ◽  
Author(s):  
Shiqiao Xu
Keyword(s):  
Cross Section ◽  
Coupling Effect ◽  
Steel Wire ◽  
Operation Time ◽  
Element Model ◽  
Arch Bridge ◽  
Temperature And Humidity ◽  
The Cross ◽  
Numerical Finite Element ◽  
Arch Bridges

With the continuous improvement of bridge span, high-strength steel wire suspenders are more and more widely used in arch bridges. Because metals are thermodynamically unstable, most metals will corrode at a different speed. Especially with the increase of bridge operation time, the suspender steel wire will be corroded under the coupling effect of external environment and internal temperature and humidity. By taking Wanganshi Fuhe Bridge as the engineering example, this study established a numerical finite element model to simulate the variation of temperature in the cross section of the suspender. Then, the distribution of humidity in the cross section in the suspender under the influence of temperature can be obtained. Finally, the corrosion rate of the suspender and the residual diameter after corrosion at different operating years were calculated. Based on the analysis results, the performance of the suspender is divided into different grades which can be used to guide the maintenance and replacement of the suspender of the arch bridge by the bridge maintenance and management department.

scholarly journals Experimental Behavior of Composite Infilled & Encased Column by using MSAND, Metakaolin & Recron Fibre

2019 ◽  
Vol 8 (4) ◽  
pp. 12508-12514
Keyword(s):  
Compressive Strength ◽  
Cross Section ◽  
Load Carrying Capacity ◽  
Steel Tubes ◽  
Circular Section ◽  
Concrete Filled Tubes ◽  
Load Carrying ◽  
Fiber Concrete ◽  
Infill Material ◽  
Concrete Filled Steel Tubes

In this analysis, take a look at on compressive strength of composite infilled and encased columns were done. Compressive strength of hollow, tubular and encased typical section in addition as Msand, silcafume, metakaolin & recorn fiber concrete-filled tubes were decided. Cross-section, compressive strength, and mode of failure of the column to be explored. The circular section and square section were selected for this research. The association between the load, and the later displacement at the mid-tallness, base, and top of the sections inside the bearing of each the durable and powerless axes, and furthermore the connections of burden versus complete the process of shortening for each example was reliably recorded. It completely was discovered that the load carrying limit differs with importance to the cross-section of the specimen, compressive strength of the infill material. The investigation is carried out for the water-cement ratio of 0.5% for in composite column of size 150 × 150 × 1800 mm and diameter of 1800 mm of square and circular section. Then the specimens are to be tested on 7th day, 14th day and 28th day. The circular specimens having higher load-carrying capacity than square specimens. Msand, metakaolin and recron fiber waterproof agent concrete infilled in and encased steel tubes show 5% to 15 % more strength than typical control concrete-filled steel tubes.

Theoretical Analysis of Surface Waves on Liquid Jets in Crossflows with Deformation

2013 ◽  
Vol 681 ◽  
pp. 152-157
Author(s):  
Shao Lin Wang ◽  
Yong Huang ◽  
Fang Wang ◽  
Zhi Lin Liu
Keyword(s):  
Growth Rate ◽  
Theoretical Analysis ◽  
Surface Waves ◽  
Cross Section ◽  
Aerodynamic Force ◽  
Linear Instability ◽  
Wave Number ◽  
Liquid Jets ◽  
Liquid Jet ◽  
The Cross

Liquid jets in cross air flows are widely used and play an important role in propulsion systems, such as ramjet combustors. Surface waves on the liquid jets in gaseous crossflows have been observed in numerous experiments. Especially for lower gas Webber number, liquid jets breaks up due to the surface waves. However compared with injecting into gas coaxial flow, liquid jet will be deformed in crossflow due to the transverse aerodynamic force. Deformation of jet is investigated by analyzing stress force equilibrium of the cross-section. Though linear instability analysis, dispersion relation and growth rate of surface waves of liquid jet with deformation were derived. According to the present theoretical analysis, the cross-section shape can be deformed to stable ellipse only if the gas velocity was lower than 9m/s for 1mm diameter jet. The maximum growth rate of disturbances takes place at wave number 0.7 approximately, and it will decrease with increasing the jet diameter. The range of instable wave number will expand and the most instable wave number will grow for the deformed jets.

Simulation of the temperature field along the cross-section of a ring during the ring rolling process

1993 ◽  
Vol 64 (12) ◽  
pp. 604-610 ◽  
Author(s):  
Kevin E. Sweeney ◽  
Achim Kluge ◽  
Herbert Wiegels ◽  
Reiner Kopp
Keyword(s):  
Temperature Field ◽  
Cross Section ◽  
Rolling Process ◽  
Ring Rolling ◽  
The Cross ◽  
Ring Rolling Process

scholarly journals Parametric study on the behaviour of bolted composite connections

2012 ◽  
Vol 5 (4) ◽  
pp. 468-499
Author(s):  
M. N. Kataoka ◽  
A. L. H. C. El Debs
Keyword(s):  
Numerical Model ◽  
Cross Section ◽  
Cross Sections ◽  
Parametric Analysis ◽  
Bending Moment ◽  
Composite Beams ◽  
Steel Tubes ◽  
Composite Connections ◽  
Concrete Filled Steel Tubes ◽  
Steel Deck

The studied connections are composed of concrete filled steel tubes (CFT) connected to composite beams by passing through bolts, endplates and steel deck, which also contributes to support the applied loads. The parametric analysis presented in this work is based on numerical simulations performed with software TNO Diana, using experimental results to calibrate the reference numerical model. The influence of three main parameters, being them the bolts diameter, the slab height and the beams cross section, was evaluated. According to the obtained bending moment versus rotation curves, it was concluded that, among the three parameters analyzed, the most important one was the bolts diameter. About the beams cross section, inconclusive results were achieved, probably due to the incompatibility between the 16 mm bolts and the robust beam cross sections considered in the parametric analysis.

Sign in / Sign up

Export Citation Format

Share Document