Simulation of the welded roof truss behaviour under distributed loadings
Journal Title: Вісник Тернопільського національного технічного університету - Year 2015, Vol 79, Issue 3
Abstract
The paper deals with the typical 36x9m size welded steel roof truss behavior under the influence of evenly distributed static load of different intensity on its top chord. Computer simulation is performed taking advantage of ANSYS Workbench 14.5 software that is algorithmically based on finite element method. Structural, technological and operational features of the investigated truss are considered during the formation of input information base for mathematical model. Finite-element model parameters were received from the earlier experimental researches of the authors who predicted the computer simulation experiment results verification as the result of simultaneously performed semi natural load-bearing experiments. Such methodical approach provided high validity of the modeling results to be obtained. The value of the distributed static yield load on the truss top chord q = 70 kN/m was obtained taking into account the weight of truss and roof covering themselves, the wind, rain and snow effect, and basing on the standard regulations recommendations. According to the simulation results the stress-strain state parameters of the construction were obtained. The welded roof truss behavior under the extreme operating loading was evaluated. It was discovered that the top chord of the truss operates under elastic deformation conditions the possibility of additional loading being 42.8%. However, in the joint areas of bottom chord tension emerge, which exceed the elasticity yield of S235J2G3 steel by 12.9% of which the frame is made. In order to ensure the safe operation of the roof truss it is recommended to reduce the distributed load from q=70 kN/m to q=62 kN/m that is by 12.9%. It can be achieved by reducing the distance between trusses. It is recommended to reduce the tension in the bottom chord of the truss to the elasticity yield level by the local strengthening of the construction. These researches are worth being conducted while designing new welded trusses, their reconstruction, or for the verifying calculations of welded roof trusses under operation.
Authors and Affiliations
Yaroslav Kovalchuk, Natalya Shynhera, Oksana Kachka
Keywords
Related Articles
- EP ID EP571046
- DOI -
- Views 45
- Downloads 0
Method for studing the multi-solitone solutions of the korteweg de-vries type equations based on the T-transformation
In recent years the investigation of separated waves plays an important role in many applied scientific fields. Travelling wave solutions can describe various phenomena in fluid mechanics, hydrodynamics, optics, plasma p...
Peculiarities of the local stresses field near the crack tip which goes out from the angular point of the broken interface
The homogeneous problem of the elasticity theory about the stress-strain state of piece-homogeneous body near the tip of the semi-infinity crack of arbitrary orientation under the plane strain is considered. The crack ti...
Analysis of risks while connecting to the power supply system of the administrative building of the kinetic energy storage unit for the purpose of load regulation
On the basis of the analysis of the risks arising from the power supply of the building's power supply system from the kinetic electronics to the time of maximum load, according to the network analysis method developed b...
The quasistatics thermal stress analysis in coated half-space with mixed boundary heating conditions
Analysis of thermal stresses in bodies with coatings is important for many engineering researches. Taking into account the actual operating conditions of these structures frequently leads to mixed heating condition. The...
Evaluation of domain wall displacement into ferromagnetic materials under the influence of external magnetic field
The analysis of the theoretical approaches to modeling the domain walls motion in the ferromagnets for the actions of external reversal magnetization field are considered. The energy of a ferromagnetic material as a sum...