Shaping of Axially Compressed Bipolarly Prestressed Closely Spaced Built-Up Members

K e y w o r d s : Axially compressed member; Bipolarly prestressed member; Bipolarly prestressed closely spaced built-up member; Bisymmetrical cross-section; Closely spaced built-up member; Load-bearing capacity. 1/2020 A R C H I T E C T U R E C I V I L E N G I N E E R I N G E N V I R O N M E N T 87 A R C H I T E C T U R E C I V I L E N G I N E E R I N G E N V I R O N M E N T The Si les ian Univers i ty of Technology No. 1/2020 d o i : 1 0 . 2 1 3 0 7 / A C E E 2 0 2 7 M . S i e d l e c k a L total member length; L1 extreme section length with straight member; L2 prestressing zone length; prestressing range; Lb distance between friction grip bolts; Ls distance from the member edge to the first of the bolts joining the chords; Ncr Engesser critical load capacity; Ncr modified Engesser critical load capacity; Ne Euler critical buckling load; Neb modified Euler critical buckling load;