Corrugated Steel Grain Silo Design Studies Test Model Assembled Floor

Steel silos, its light weight, building speed, adaptability, ease of production is characterized by mechanized operations around the world to get a large number of practical applications. Steel silos are two forms, overhead and floor type. Current world has been built silos steel silos by about half, most of which is circular steel silos. Circular steel silo is a rotary shell structure, behavior problems and stress failure criteria such as steel silos are very complex, there are many issues to be further addressed. In fact, due to the lack of design criteria to accurately reflect the structure of steel silos force performance, steel silos all engineering structures has become the highest rate in the form of structural damage. According to preliminary statistics, the only year in North America alone silo structure around 1000 cases of damage accidents, and damage to other areas of the same general silo. Economic losses caused by the destruction of the silo structure is not limited to the structure itself, but the main cause of industrial production process is interrupted, such as leading to large-scale chemical plants, power stations produce pause. Over the past two decades, the steel silo has been one of the focus areas of the international engineering structures, Australia, Europe, USA, Canada, South Africa and China’s Hong Kong and so on for the structural behavior and the analysis and design of steel silos theory a lot of research. Compared to domestic research started late in terms of steel silos. With the rapid development of the domestic economic construction, promote the use of the various areas of production of steel silos for very urgent needs. At present, domestic floor-theory and design methods grain steel structure with suitable but not- a lot of instability due to the vertical stiffeners damages resulting scrap steel silo accident occurs even greater impact in the actual project, and this is because the current grain steel design specification for vertical stiffeners do not provide in-depth basis, can not solve practical engineering problems faced. It is in this context, for the floor-corrugated steel silos broader market needs and applications, the paper corrugated steel silo floor as an object, considering vertical stiffeners for multi-stage variable cross-section, to design an experimental model (Taking a warehouse for engineering prototypes, scale 1:10), for vertical stiffeners unstable failure study, hoping to floor-assembled steel silos in our country’s development, contributing to the application.In order to solve practical engineering barn body vertical stiffeners instability due to the damage caused by the destruction of the issue, the subject of joining the National Natural Science Foundation of relying on steel silos instability experiment and theoretical research, mainly scale steel tube warehouse design test model. After the scale, warehouse wall section stiffener section, bolted, stiffeners top and bottom boundary conditions, etc. are different compartment design and prototype engineering practice. The issue ultimately to achieve vertical stiffening rib plane buckling occurs. Test model design is reasonable, is a key factor in determining the success or failure of structural instability experimental study.Because there are a lot of practical engineering steel silos Vertical stiffener buckling occurs destruction to silo failure phenomenon, and the existing "grain steel design specification" (GB50322-2011), but this phenomenon is not an effective solution-existing norms for vertical stiffeners relate only to the second-order calculation of variable cross-section of the design, while the vertical actual projects often appear larger than the second-order variable cross-section of the stiffener. This test will design a test model, the experimental study next, verify:a vertical stiffener at grain loads, are more likely to happen is unstable failure, rather than the current norm of strength that damage.2, the accuracy of the calculation model of the proposed amendments to the theoretical research, development and validation of the design theory and stable steel silos.In view of this situation, this method and finite element calculation through the combination of theoretical analysis, the stiffening rib calculation length coefficient were analyzed, and some useful results are obtained:...