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SCIENTIFIC-TECHNICAL CENTER » STEEL STRUCTURE » SINGLE PIPE ARCH HANGARS

Strength calculation of single-pipe arch hangar

 Organization of OOO «EvroAgro Center" specializes in the creation and implementation of a phased modernization projects, as well as transition economies in the loose housing cattle.

  Commissioned by OOO «EvroAgro Center" was made strength calculation of a one-pipe steel arch on the main load combination. Calculated and strength calculation circuit designs implemented via APM Structure3D module constituting the APM Civil Engineering Prof. system STEEL v.9.6. The building structure is a set of one pipe arched trusses which are interconnected via a system runs. Bearing arches firmly attached to the vertical support columns made of concrete. The overall design scheme arch single pipe steel is shown in the images below

General view of the calculation model of the building
 
The scheme of installation of support in the calculation model
 
The system runs

Building Steel is attached to the previously constructed foundation. A total of 78 models calculated control points.

 

  When calculating one pipe arched metal load into account such as rope tension, its own weight of the structure, snow and wind.

  As a result, these "loaded" were created:

  • Own weight;
  • Snow load is uneven;
  • Snow load uniform;
  • Wind perpendicularly;
  • Wind parallel.

  This design will be built in the village of New, Mozhaisk district. The construction site is related to the I-th wind and III-th Snow district that will be taken into account when defining the respective load values ​​and some coefficients.

 

  building design calculation is carried out on the basic load combinations, consisting of permanent, long-term and short-term loads. Based on the above six of the created load cases combinations of load cases were drawn.

The list of "Combination of loading."

The combination of loads 0

The combination of load cases 1

Combination loadings 2

room

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room

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room

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0

 Own weight

0

Own weight

0

 Own weight

1

Snow load uniform

2

 Snow load uneven

1

 Snow load uniform

4

 wind parallel

4

 wind parallel

3

 wind perpendicular

Combination loadings 3

The combination of load cases 4

The combination of loads 5

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room

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0

 Own weight

0

 Own weight

0

 Own weight

2

 Snow load uneven

1

 Snow load uniform

2

 Snow load uneven

3

wind perpendicular

 
 

 

  Certain combinations of loads №4 and №5 were created specifically to simulate the situation with the lack of wind load after a snowfall.

Calculation of the hangar construction:

The following calculations were made for the analysis of the design functionality: static calculations for stability, calculation of load capacity.

 

Static analysis:

 The fourth combination of loads was the most unfavorable. This can be explained by the fact that "unloads" a frame structure at a given geometrical shape design wind action. Consequently, the worst case loading structures - excluding action of wind load. Color cards results of this combination are shown in Figure 2.

Map of the distribution of equivalent stress building's metal
 
Map of the distribution of total displacement elements building metal
 
displacement distribution map of the Z-axis elements of the building's metal
 
Distribution map of normal (axial) stress building's metal
 
Map of the distribution of axial forces in the elements of the building's metal

According to maps of the results shows that the greatest stresses occur in runs that are attached to the end walls.

 

 

Calculation of resistance:

The minimum coefficient given design safety factor obtained for the combination of the building loadings №5, for which results are presented below.

 

Checking bearing capacity:

According to the SNIP II-23-81 * «Steel structures" checked the bearing capacity of the most loaded structural element. For this purpose were used specialized function module APM Srtructure3D to work with steel structural elements.

 

 

Based on the results of the analysis hangar designs appropriate conclusions about its efficiency have been made for given embodiments of external loading.

 

Recommendations were made to strengthen the necessary details by which the attachment of the lower part of the support arches. Amplification of this part may be accomplished by complement existing construction parts four ribs.

 
Buckling of steel buildings
 
 
 
 
 
 
 
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