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Mechanical Principle in Crossing Web Member of Cold-formed Steel Triangular Transmission Towers

Author: WangShaoMan
Tutor: HeMinJuan
School: Tongji University
Course: Structural Engineering
Keywords: Cold-formed steel Curling equilateral angle Crimping C steel Square tube steel High-frequency welding tube steel Bearing capacity reduction factor
CLC: TU392.1
Type: Master's thesis
Year: 2006
Downloads: 103
Quote: 0
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Abstract


In this paper, microwave communication tower cross section triangular corner posts using cold forming single angle 60 ° diagonals can be cold formed steel in the form of the four - section - curling angle iron , curling C-shaped steel , square tube steel and high-frequency welding tube steel . The study showed that: this tower structure has better prospects for economic and engineering applications , is worth promoting the application . The major research achievements of this article : 1 . Tower with the new diagonals four -section form of detailed discussion and analysis of the general stability theory of thin-walled bar , the practice has proved : results of numerical simulation and theoretical calculation of the ANSYS program better. Elaborate and analysis of the basic principles of the strut nonlinear buckling analysis using ANSYS program and made ??a detailed study of its constitutive relations and failure criteria and material unit selected parameter selection . 3 four -section of the tower structure forms the boundary constraints stability ultimate bearing capacity theory simplified calculation model . 4 In considering the initial eccentricity and initial bending based on ANSYS finite element model of shell elements to simulate the struts of the form of a four -section tower diagonals axial compression and eccentric compression nonlinear buckling analysis and ultimate bearing capacity accordingly drawn in each section form axial compression and eccentric compression ratio , compared with the carrying capacity reduction factor derived specification , and specification reduction factor to take the value correction some suggestions .

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CLC: > Industrial Technology > Building Science > Building structure > Metal structures > Various types of steel > Steel structure
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