Investigation of parameters of pre-stressed metal combined cable-stayed systems with hanging transport equipment

Abstract

The previous tension in building structures allows the distribution of force between the elements of the structure so that in each of them, at least at one combination of loads, the actual stress is equal to or close to the calculated resistance of the material. Pre-stressed metallic combined cable-stayed systems with hanging transport equipment have been investigated. They have been calculated with optimization of distribution of forces and material according to the method and algorithm proposed by the author. Optimization has been done executed using linear programming. With the help of the computer program created by the author, calculations of metal constructions of combined cable-stayed coverings of industrial buildings with 60, 85 and 105 meters spans were performed on the permissible combinations of permanent, snow, wind and crane loads. Comparison of calculations results was carried out on maximum deformations and the actual weight of the structure, using the graphs made by the author, concerning dependence of construction coefficients of weight of the cables on their length. Recommendations are given for the calculation of such structures in accordance with the undeformed scheme, the dismemberment of the beam of rigidity on the panel, the method of coupling the beam of stiffness, pylons and risers, the number of suspension guy, the height of the pylons, the slope angle of the guy-wire, the choice of the material of the cables, The table and examples of graphs are presented, which illustrate some results for individual runs of the investigated constitutions.