The Bresler equation works well as long as Pn is at least as large as 0.1Pno. Should Pn be less than 0.1Pno, it is satisfactory to neglect the axial force completely and design as a member subject to biaxial bending only. Using the same capacities: ex = 350 mm ey = 220 mm (f'c=28 MPa and fy=420 MPa) with 14-20mm
The Bresler equation works well as long as Pn is at least as large as 0.1Pno. Should Pn be less than 0.1Pno, it is satisfactory to neglect the axial force completely and design as a member subject to biaxial bending only. Using the same capacities: ex = 350 mm ey = 220 mm (f'c=28 MPa and fy=420 MPa) with 14-20mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A method published by Professor Boris Bresler in 1960 relates the desired value of ØPn under biaxial loading (ex and ey) to three other Pu values.
Where
Pnx = axial load capacity of the column for eccentricity ex with ey = 0
Pny = axial load capacity of the column for eccentricity ey with ex = 0
Pno = pure axial capacity of the column
The Bresler equation works well as long as Pn is at least as large as 0.1Pno. Should Pn be less than 0.1Pno, it is satisfactory to neglect the axial force completely and design as a member subject to biaxial bending only. Using the same capacities: ex = 350 mm ey = 220 mm (f'c=28 MPa and fy=420 MPa) with 14-20mm
Transcribed Image Text:Pn
=
1
+
Pnx
1
Pny
1
Pno
Transcribed Image Text:480 mm
600 mm
60 mm
400 mm
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