Stress Mechanism Of Steel Cable In Super Large Scale Steel-Cable-Bamboo Combined Silo

As the storage tool developed in the last century, silo structure is widely used in production and living fields, such as industry, agriculture etc., especially plays an important role in grain storage field. Grain issue is vital to the nation and people, and the grain storage is the fundamental of economic development and social harmony. Although the research of common silo form tends to be matured, the existing silo system still cannot meet the requirements of storage problems. So intensive research about new materials, new techniques, new structure is urgently needed. Due to this background, the super large steel-cable-bamboo combined silo structure is presented to meet the requirements of grain storage safety in this paper.Firstly, the discharge test of the steel silo-cable scale model under different ways of unloading and different arrangements of cable was conducted, and analysis the discharge character. Secondly, on the basic of the analysis on silo wall and cable stress,use experiment results and FEA software to research the mechanism of the prestress cable structure of the silo; then, use FEA software build the silo model, get the better silo steel structure arrangement and the section size, steel arrangement, the cable’s section, and the prestress. Lastly,on the basis of test result and FEA element analysis to simplify the design and deepen the research of the cable arrangement, get a better arrangement of the super large steel-cable-bamboo combined structure.The main conclusions in the research as follows:(1) The grain flow type mainly divide pipe and holistic,and the type turn on alternatively until the unload ends;(2) Prestress changes of the cable in the silo structure is related to the stiffness of the silo wall. While the prestress is the same, the bigger the stiffness is,the bigger cable force is;(3) Different arrangement of the cable in different unloading will produce different dynamic magnify factor η. The η ranges from 1.01~1.26. This paper suggest 1.3, which need considered in the following design;(4) The cable force formula depends on the :the deep and the low. The results in this paper is more closer with the low style. The reason maybe is the taken time is not enough;(5) The cable and steel skeleton composed a self-adaptive system, and the internal force and deformation can be adjusted actively by the prestress applied. The steel skeleton can constrain the silo’s transformation, and reduce steel consumption;(6) The better scheme is steel skeleton optimize scheme one,five floor cable(alternative arrangement);...