Pre-engineered building design of a portal frame of a factory using eurocode 3
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Date
2019-06
Authors
Bong Wely
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Abstract
This dissertation presents the design of tapered member for pre-engineered steel
structure with Eurocode 3 (EN 1993-1-1:2005 “General rules and rules for buildings”)
based on a construction drawing of a factory. Type 1 of load combination (1.35Gk +
1.50Qk) was selected to be designed due to the most critical condition. Structural
performance at initial analysis and final analysis of the selected critical frame were
carried out using Dlubal RSTAB 8.18. The structural frame stability and sway
imperfections were checked based on EN 1993-1-1:2005. The results of the bending
moments, shear forces and axial forces of the selected steel members were tabulated in
tables. To assess the structural stability of the portal frame using EC 3, cross sectional
resistance and member buckling resistance were verified based on Clause 6.2.4 –
Compression, Clause 6.2.5 – Bending Moment, Clause 6.2.6 – Shear, Clause 6.2.8 –
Bending and Shear, Clause 6.2.9 – Bending and Axial Force and Clause 6.3.4 – General
Method for Lateral and Lateral Torsional Buckling of Structural Components. In this
study, the cross sections of the selected web-tapered for rafter and column were classified
under Class 4. These involved the consideration of elastic shear resistance and effective
area on the critical steel sections. Besides that, the application of the General Method on
the verification of the resistance to lateral and lateral torsional buckling for structural
components required the extraction of some parameters using structural analysis
software. In this case, minimum load amplifiers such as αult,k and αcr,op were extracted
from Dlubal RSTAB 8.18 through finite element analysis. Then, the differences in the
design of tapered member for pre-engineered building using EC 3 were compared with
previous case studies.