Research On The Top Steel-tube Truss Supporting System Of Silo

A type of bunker is applied with the continuous development of the coal-demand.This type of bunker is large reserves and small floor coverage. The checkingcalculation of the top supporting system is important and difficult. Now a very fewstudies have investigated the top supporting system. The main objectives of thisresearch are to evaluate the bearing capacity and the deformation performance of thesupporting system.In this paper, the steel-tube truss supporting system and the radial sparssupporting system which are applied in practical engineering has been analyzed. Thestudy involved experiments conducted on the new type of rotating-fastening membersand the design of the supporting system. It also focuses on summarizing the changingrule of the bearing capacity and the deformation performance. The actual structure isevaluated based on the results of finite element analysis. It not only providestechnique basis for the acceptance of project, but also provides some theoreticalanalysis for the similar supporting system of silo.Mechanic test on12members are done to draw up the load-displacement curveof the components members. Different members of new rotating-fastening steel-tubeare comparative analyzed according to experimental datas and experiment phenomena.Then the members are evaluated. The finite element analysis software---ANSYS isused to bulid some models of supporting system. The bearing capacity and thedeformation performance are comparative analyzed to achieve the optimization ofdesign of supporting system. Therefore, the best construction scheme is chosen. Thefollowing conclusions are drawn from the test and the construction analysis: Thereason of damage of memebers is related with weld under uniaxial tensile conditions.Therefore, the welded joint needs to be improved. Three groups of members arebuckling failure under uniaxial compression conditions. The displacement increaseswith increasing of diameter under the same loads, so the stress on the truss is moreand more unfavorable with the increasing of the diameter. The bearing capacity ofconstruction platform increases with increasing of depth of truss in the same diameter,1.2m is the ideal depth. The bearing capacity of construction platform decreases withincreasing of length of chord in the same diameter. Considering the convenience ofconstruction,1.2m is the ideal length. The bearing capacity of radial spars supportingsystem is bigger than the steel-tube truss supporting system under the same diameter and the stranded wire improves the bearing capacity effectively. The influence ofdiameter, depth of truss, length of chord and quantity of stranded wire ondisplacement and bearing capacity of truss supporting system is evaluated based onthe results of the analysis on four different construction schemes. The scheme that thequantity of stranded wire is60,36and20is the best scheme.