Draft

14.1Introduction 231

w

P

w/2

-w/2

w/2

-w/2

w/2

-w/2

w/2

M’

M’

-M’/L M’/L

-M’/L M’/L

a

b

h

L c d e f g h i j k l

p

M

w/2 w/2

M’

-M’/L

p

-M’/L

p

w/2 -w/2

-M/h M/h

p/2 p/2

-M/L

w/2 -w/2

0.36M/h

-0.36M/h

-M/L

p/2 p/2

-w/2

0.68M/h

-0.5M’/L

p/2 p/2

M

M

w/2 w/2

w/2 w/2

M M

M/h

w/2 w/2

M’/2 M’/2

p/2

-M/L M/L

0.4M 0.4M

0.64M

0.4M/h

w/2 w/2

M’/2

p/2

-M’/L M’/L

0.55M

0.45M

M’/4 M’/4

M’/4

0.68M/h

p/2

w/2 w/2

M’/2L

-M’/2L

POST AND BEAM STRUCTURE

SIMPLE BENT FRAME

THREE-HINGE PORTAL

THREE-HINGE PORTAL

TWO-HINGE FRAME

RIGID FRAME

-0.68M/h

M’/4

0.45M

M’/2

Frame Type Deformation Shear Moment Axial

W=wL, M=wL/8, M’=Ph

2

Figure14.3: Deformation,Shear,Moment, andAxialDiagramsforVariousTypes of Portal

FramesSubjectedto VerticalandHorizontalLoads