Open AccessSecond-order Direct Analysis of Steel Structures made of tapered members
Author(s) -
Siu Lai Chan,
SW Liu,
Liu Yp
Publication year - 2018
Language(s) - English
Resource type - Conference proceedings
DOI - 10.4995/asccs2018.2018.7221
Subject(s) - structural engineering , welding , span (engineering) , buckling , space frame , section (typography) , constraint (computer aided design) , process (computing) , beam (structure) , joint (building) , computer science , engineering , mechanical engineering , operating system
Mild steel hot-rolled sections are commonly prismatic because of the rolling process with a furnace, but welded sections made from steel plates do not have such a constraint, especially when robotic welding machines are used. The weight saving could be very significant by, say, using wide flanged section at mid-span and a small flanged section at ends of a simply supported beam. However, design codes do not provide formulae for buckling check of tapered members. This paper proposes a code-free second-order direct analysis for stabilty design of steel frames made of tapered members. The design is further applied to a single layered mega space frame of 136m span. In the whole design process based on the concept of Second-order Direct Analysis, no uncertain effective length and independent member buckling checking are required.