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Research on Integral Stability of Steel Chimney with Guy Rope that is Worked on Initial Stress and Slope Angle of Guy Cables

Author: CuiZuoZuo
Tutor: GongYuFa
School: Liaoning Technical University
Course: Structural Engineering
Keywords: The steel chimney with guy rope integral stability three direction guy cables initial stress of guy cables slope angle of guy cables
CLC: TU347
Type: Master's thesis
Year: 2008
Downloads: 23
Quote: 1
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Abstract


The steel chimney which is disposed several inclined pre-stressed guys of multi-stories around,when the ratio of height and diameter greater than 20 times ,is called steel chimney with guy rope。It is the guyed mast of which cross-section is cylinder。Suffered by the non-linearity of guys and second order moment of the mast,the whole structure displays relatively strong non-linearity。The catastrophic failure probability of guyed masts is very high under normal designing and constructing conditions in civil engineering field。Many of them were damaged because of the integral stability failure。So it is meaningful to carry research work on the integral stability of steel chimney with guy rope。From the study before,we can see that there are several parameters involving integral stability of guyed mast。When designing a guyed mast,an engineer usually selects these parameters by their experience。For example,the initial stress of guy cables is between 200 N / mm2 and 250 N / mm2;the slope angle of guy cables is near 45°。The aim of paper is to determine whether these default parameters are suitable for integral stability of steel chimney with guy rope and then present the most optimized parameters。The conventional methods to analyze the stability of the guyed mast are the beam element method and the stuss element matrix displacement method。The paper introduces a new method to analyze the stability of the steel chimney with guy rope by using ANSYS。By comparing the integral stability of a great number of models,the paper discusses the suitable range of parameters of steel chimney with guy rope,which includes the initial stress of guy cables,the slope angle of guy cables,the number of stay levels。Based on the calculation,some influential parameters on the stability of steel chimney with guy rope are analyzed and some useful conclusions are presented。In the finality,the problems requiring further studies are discussed。

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