INFLUENCE OF THE SLOPE FOR THE DISTORTION EFFECT OF PRE-STRESSED SKEWED BOX-SECTION GIRDER BRIDGE

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Jian-Qing Bu ◽  
Shuo Li
Keyword(s):  
Cross Section ◽  
Longitudinal Direction ◽  
Element Analysis ◽  
Box Section ◽  
The Finite Element Analysis ◽  
Distortion Effect ◽  
Girder Bridge ◽  
Bridge Models ◽  
Distortion Angle ◽  
Design Construction

In order to analyze the distortion effects of the skewed PC box-section girder bridge, a simply-supported and three-span continuous skewed PC box-section girder bridge models are built by using the finite element analysis software ANSYS in this paper. First of all, the distortion effects in the longitudinal direction are analyzed for the bridge models and the most disadvantage section are found. Then the longitudinal distortion effects how to vary with the slope is discussed. The results show that the influence of slope is remarkable, with the increase of slope, distortion is becoming more and more large, and it is proportional to the slope degree, the distortion angle of 1/4 span and 3/4 cross section of the bridge is the largest. Therefore, in the process of design, construction and maintenance, the deformation of unfavorable cross section should be paid special attention.

Design Research of Steel Pipe Combination of Angle Steel Tower of XiYue 220kV Cross Section

2013 ◽  
Vol 470 ◽  
pp. 408-411 ◽  
Author(s):  
Yan Zhong Ju ◽  
Xiao Xu Fu ◽  
Neng Xian Zeng
Keyword(s):  
Finite Element Analysis ◽  
Cross Section ◽  
Design Research ◽  
Axial Stress ◽  
Steel Pipe ◽  
Stress Difference ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Angle Steel

Given the path situation of Xiyue substation 220kV four outlets project crossing Shunde waterway section,this article applies of Dao Heng tower full stress analysis software and the finite element analysis software ANSYS to two steel pipe combination of angle steel towers to carry on design research,contrast axial stress of two kinds of software,analyse the reasons of axial stress difference.

Finite Element Analysis for the Collapse Accident of a 110kV Transmission Tower

2014 ◽  
Vol 986-987 ◽  
pp. 927-930
Author(s):  
Yi Zhu ◽  
Bo Li ◽  
Hao Wang ◽  
Kun Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Strong Wind ◽  
Transmission Tower ◽  
Element Analysis ◽  
Straight Line ◽  
The Finite Element Analysis

Put the finite element analysis of line tower coupling modeling to the collapse of a 110 kV line straight-line tower, study the effect of strong wind on transmission tower and wire. The results show that under the action of strong wind, the material specification selected by the part of the rods on the type of tower is lower, cross section is smaller, the principal material of tower will be instable and flexional under the compression, resulting in tower collapsed.

Research on the Anti-Vibration Technology of Large Cross-Section Conductor

2013 ◽  
Vol 457-458 ◽  
pp. 522-526
Author(s):  
Jun Zhang ◽  
Kuan Jun Zhu ◽  
Zhen Liu ◽  
Xue Ping Zhan
Keyword(s):  
Cross Section ◽  
Performance Test ◽  
Power Transmission ◽  
Normal Operation ◽  
Large Cross Section ◽  
Element Analysis ◽  
Test Analysis ◽  
Vibration Effect ◽  
The Finite Element Analysis ◽  
Vibration Technology

The conductor is an important part of the process of power transmission. Keep conductor to be normal operation is an important link of power transmission. In practice, Due to the influence of many weather environments, such as wind, temperature, rain and snow, the conductor often appear ice disaster, dance and other disasters; therefore, the anti-vibration technology of conductor is an urgent need to develop. This paper masters the performance of damper by carrying out a great deal of performance test analysis, such as self-damping, the power of damper, anti-vibration effect. At the same time, this paper understands the effect of spacer arrangement on the sub span oscillation, through the finite element analysis and lingo program of nonlinear programming, laying the foundation for studying anti-vibration technology for large cross-section conductor.

scholarly journals The Generalized Untwist Problem of Rotating Blades: A Coupled Aeroelastic Formulation

1994 ◽  
Author(s):  
Gao-Lian Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Theoretical Basis ◽  
Variational Principles ◽  
Element Analysis ◽  
Rotating Blades ◽  
Section Shape ◽  
The Finite Element Analysis ◽  
Elastic Distortion

The untwist of rotating blades in turbomachines treated so far in the literatare simply as a pure elasticity problem is generalized and formulated rigorously as a problem of aeroelasticity by variational principles (VPs) and generalized VP (GVP). It takes into account not only the centrifugal force, but also the aeroelastic interaction between blades and the flow as well as the elastic distortion of the cross section shape of blades, assuming the material to be linearly elastic but nonisotropic. Thus, a new rigorous theoretical basis for the finite element analysis of blade untwist in turbomachine design is provided.

The Equal Bending Strength Design of Space Curve Meshing Wheel

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Yang-zhi Chen ◽  
Shun-ke Liang ◽  
Jiang Ding
Keyword(s):  
Finite Element Analysis ◽  
Cross Section ◽  
Mechanical Model ◽  
Bending Strength ◽  
Power Transmission ◽  
Space Curve ◽  
Element Analysis ◽  
Small Power ◽  
Theoretical Design ◽  
The Finite Element Analysis

The space curve meshing wheel (SCMW) has been studied previously for small power transmission. To extend its application in conventional power transmission, the bending strength of the SCMW needs to be studied. In this paper, the tine's section of the SCMW is optimized, the mechanical model of the bending strength is deduced according to the equations for a couple of given contact curves of the SCMW, and the design formulas of the tines are newly deduced based on the equal bending strength principle. Finally, one design example of a SCMW with elliptical torus cross-section tines is provided. The result shows that the theoretical design attained from the presented formulas coincides with that from the finite element analysis. It dedicates that the SCMW possesses enough equal bending strength to be used to in conventional industrial gearing device design.

Key Factors Affecting the Amplitude of a Composite Ultrasonic Wiredrawing Vibration System

2012 ◽  
Vol 157-158 ◽  
pp. 395-399 ◽  
Author(s):  
Xiao Biao Shan ◽  
Nai Ming Qi ◽  
Li Li Wang ◽  
Tao Xie
Keyword(s):  
Cross Section ◽  
Ultrasonic Vibration ◽  
Variable Cross Section ◽  
Experimental Result ◽  
Variable Cross ◽  
Vibration System ◽  
Key Factors ◽  
Element Analysis ◽  
Factors Affecting ◽  
The Finite Element Analysis

This paper studied the key factors affecting the amplitude of a composite ultrasonic wiredrawing vibration system, for designing a powerful ultrasonic vibration system. The finite element analysis (FEA) was performed. The results showed that the variable cross-section shapes of horns and the angles between the connection of both ends of the cross-section and the center line had great effects on the amplitude of an ultrasonic vibration system. In order to valid the theoretical result, the experiments were carried out on a composite ultrasonic vibration system. The experimental result demonstrated that the conical variable cross-section rods used in an ultrasonic vibration system produced large amplitude.

Effect of Radius of Curvature on Seismic Response of Curved Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1261-1265 ◽  
Author(s):  
Bo Wang ◽  
Yu Xiang Liu
Keyword(s):  
Seismic Response ◽  
Numerical Models ◽  
Response Spectrum ◽  
Radius Of Curvature ◽  
Element Analysis ◽  
Curved Bridge ◽  
The Finite Element Analysis ◽  
Calculation Results ◽  
Girder Bridge ◽  
Main Girder

A four span curved HcontinuousH HboxH-girder bridge is used as an engineering example to investigate the effect of radius of curvature on the seismic response of curved bridge. Numerical models with different radii of curvature are created using the finite element analysis program Midas/Civil. The calculation results obtained from response spectrum method show that radius of curvature is an important parameter to curved bridge. When the radius of curvature is large enough, the relationship between seismic response of main girder and radius is approximately linearity, while nonlinear variation is obtained when theradius is not too large. Finally, conclusions are made that seismic design of Hstraight bridgeH unHfoldHed from curved bridge which radius of curvature is specified could Hsatisfy the engineering Hrequirement.

Experimental Study on Three-Span Continuous Wide Curved Box Girder Bridge Model

2014 ◽  
Vol 638-640 ◽  
pp. 937-941
Author(s):  
Jie Jun Wang ◽  
Peng Tan ◽  
Jiang Ya Yuan ◽  
Hai Qing Yuan ◽  
Gui Ming Zhang
Keyword(s):  
Cross Sections ◽  
Load Test ◽  
Element Analysis ◽  
Box Girder ◽  
Uniformity Coefficient ◽  
Bridge Model ◽  
The Finite Element Analysis ◽  
Practical Engineering ◽  
Scale Ratio ◽  
Girder Bridge

This paper simulates the practical engineering, using plexiglass to make a three-span continuous wide curved box girder model by the geometry scale ratio 1:30. With the model load test, measured the strain and deflection of the control cross-sections, got the distribution about the stress and deflection of the wide curved continuous box girder; And we proposed the “uniformity coefficient” to express the uneven force of the curved bridge. Compared the finite element analysis results and experimental data, the results show both are in good agreement.

INFLUENCE OF FLANGE WIDTH ON THE SHEAR-LAG EFFECT FOR PC SKE BOX-SECTION GIRDER BRIDGES

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Jian-qing Bu ◽  
Jin Yang
Keyword(s):  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Section ◽  
The Road ◽  
Finite Element Software ◽  
Girder Bridges ◽  
Lag Effect ◽  
Distribution Laws ◽  
Girder Bridge ◽  
Bridge Models

Skewed box-section girder bridges are widely used in the proceeding of the road network construction. Ignoring the shear-lag effect will give rise to the instability and failure of bridges. The single-factor calculation theory of orthogonal box-section girder bridges cannot be applied to the calculation of the shear-lag effect of skewed box-section girder bridges. In this paper, simply-supported skew box-section girder bridge models with different widths of flanges were built by using the finite element software ANSYS. The distribution laws of shear-lag effect in the transverse and vertical of skewed box-section girder bridges were more obvious with an increase in the flange width.

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