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Strength calculation of a two-storey house odnopodezdnogo Novomoskovsk.Tula region  (ECOPAN technology)

In June 2010, experts of the company SEC "APM" commissioned by the LLC "Krangormash" was carried out screening strength calculation odnopodezdnogo two-storey residential building in the town of Novomoskovsk, Tula Region on basic load combinations according to the drawings provided by the customer. 

two-storey residentia

Wooden frame of the building (walls and floors) is a set of sandwich panels consisting of OSB3 and lumber from pine 2 varieties, as well as the combined beam type «Nascor» floors.

The calculation was performed using the software «CAD / CAE system of automated calculation and design of structures for industrial and civil construction APM Civil Engineering 2010".

 

simulation design

The building's design was modeled using a core and shell finite elements.

 
design image in APM Structure3D system (numerical model)
 
Attic floor of the building panel
 
A general view of a typical floor of the building
 
The elevated floor of the building
 
Modeling of wooden frame buildings rod finite elements in accordance with the layout of the wall panels and ceiling panels
 
Finite element modeling of the cladding wall panels and slabs of OSB3

Load, impact and combinations thereof

load values ​​were set in accordance with the Terms of Reference. Uploading structure carried by several types of loads: regular (own weight of the structure, coating weight); useful (Distributed regulatory burden on the floor slabs, the attic floor); snow and wind according to the construction area.

When all specified in the specifications for individual loads loadings were created linear combinations of loads to which each of the loadings entered with respective coefficients.

Image of loads on the calculation model for one of the combinations of loads

Calculation results of wooden frame constructions

 
Map of the distribution of equivalent stress of von Mises in the intermediate floor joists
 
Map of the distribution of equivalent stress of von Mises in the wall panels
 
Distribution map Mises equivalent stress in racks wall panels
 
Map of the total displacement design wooden frame
Results of calculation of one of the structural elements 1 of floor frame

The coefficients for the use of wall elements according to the criteria of strength and stability not exceed 1, and therefore the bearing capacity of the conditions for their run.

 

The revised calculation of overlap

 
Map Mises equivalent stress for the intermediate floor elements. Beams «Nascor» NJU302 installed at 400 mm centers
 
Map of the total movement of the element intermediate floor. Beams «Nascor» NJU302 installed at 400 mm centers
 
Map Mises equivalent stresses of the elements attic floor. Beams 2 grades of pine installed at 600 mm
 
Map of the total displacement elements attic floor. Beams 2 grades of pine installed at 600 mm
 
Map Mises equivalent stresses of the elements attic floor. Beams «Nascor» NJU241, installed at 600 mm centers
 
Map of the total displacement elements attic floor. Beams «Nascor» NJU241, installed at 600 mm centers

For models overlap maximum equivalent Mises stress does not exceed 10.5 MPa, which satisfies the strength.

The maximum total displacement for intermediate floors do not exceed 20 mm, and for attic -.. 24 mm, which satisfies the rigidity condition.

 

 

conclusions

As a result of this work computational model odnopodezdnogo two-storey residential house was built. In accordance with the Terms of Reference and regulations all the necessary types of loads were applied to the design. The calculation results showed that the reliability of the proposed design for a customer of the first and second groups of limiting states is provided.

 
 
 
 
 
 
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