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Analysis of strength and stability shlambasseyna

object model

   Shlambasseyn is a cylindrical construction with an internal diameter d = 8 m. The height of the cylindrical part h = 19.4 m. The height of the tapered portion shlambasseyna h = 3.7 m. The thickness of the plate varies in the range from 8 mm to 14 mm, while the thickness of the part, providing transition to the cone is 24 mm.

     shlambasseynov group connected by horizontal steel profiles, the length of each of which is about 2 m. Also mounted on block shlambasseynov connecting them, steel gallery.

 
Fig. Type 1 design shlambasseynov collapse field
 
Fig. 2 General view of the calculation model in construction shlambasseynov APMStricture3D

     In the process of thickness measurements were obtained actual values ​​shlambasseynov wall thicknesses. Identified parent metal reservoir space wall thinning to 74%.

 
Fig. 3 circuit arrangement shlambasseyna belts and model shlambasseyna housing with design values ​​of thicknesses
 
Fig. 4 Model housing shlambasseynov №7 №13 and the actual value of the thicknesses

A bearing structure carried on the guide ring shape and six columns under each shlambasseynom. The columns are arranged on a concrete platform foundation. The height of the supporting metal studs is 0.7 m. 

     Bearing pattern formed on a foundation constructed earlier, not involved in the calculation. For GCP guide post adopted hinge fixing circuit with the prohibition of all movements along the axes OX, OY, OZ. Installation scheme supports is shown below.

 
Fig. Scheme 5 bearing shlambasseyna
 
Fig. Scheme 6 supports installation in the calculation model

Load, impact and combinations thereof

 

     load values ​​were set in accordance with the requirements

1. SNIP 2.01.07-85 * Loads and effects

2. Part 2 SNP - 1954 norms of building design

3. SNIP RK 2.03-30-2006 Construction in seismic areas

     Uploading models performed several load types: constant (own weight of the structure, coating weight), time (the load of the weight of the equipment, the people, the stored materials and products, snow and wind loads, hydrostatic loads) and special (earthquake loading).

 
Fig. 7 Driving wind load model construction
 
Fig. 8 Scheme of the wind load model construction
 
Fig. 9 Diagram of the hydrostatic load model construction
 
Fig. Diagrams 10 normal pressure distribution on the wall shlambasseyna for uploading "Hydrostatic Load"
 
Fig. 11 Scheme snow load model

After all the stress on individual loadings were created linear combinations of loads to which each of the loadings entered with the corresponding coefficients.

The calculation results

 
Fig. 12 equivalent stress distribution map shlambasseynov in the housing at the design value of the wall thickness, MPa
 
Fig. 13 equivalent stress distribution map in shlambasseynov housing when the actual wall thickness, MPa
 
Fig. 14Pervaya form wall buckling housing shlambasseyna design thickness, the safety factor 2.4 (core combinations)
 
Fig. 15, first buckling shlambasseyna actual housing wall thickness, the safety factor 2.4 (core combinations)
 
Fig. 16, first buckling housing wall thickness shlambasseyna design, a safety factor 1.1 (special combination)
 
Fig. 17 First buckling shlambasseyna actual housing wall thickness, a safety factor of 0.94 (the special combination)
 
 
 
 
 
 
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