Truss Analysis - Architectural Structures - Lecture Slides, Slides of Structural Design and Architecture

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Trusses 1Lecture 8

A

A

RCHITECTURAL

S

TRUCTURES

I:

S

TATICS AND

S

TRENGTH OF

M

ATERIALS

8 eight trussanalysis

lecture

Method of Sections •^ Trusses 2Lecture 8

relies on internal forces being inequilibrium on a section

-^

cut to expose 3 or less members

-^

coplanar forces

→ ∑

M = 0 too

A^

B

P C

F

E

D

P

. A

B^ y

AC AB

Trusses 4Lecture 8

A

Graphical Analysis •^

lettering rules (Bow’s notation)

-^

draw a force polygon of known loadsand reaction forces

a

b^

c^

d^

e^

f

g

h

i

1600 lb

1600 lb

1600 lb

1600 lb

1600 lb

2500 lb

2000b

5833 lb

4667 lb

j

k

l

m

o n

p q

r

s

t

u

2000b

Graphical Analysis •^ Trusses 5Lecture 8

draw reference directions for membersand find intersections

-^

measure and determine C or T

-^

follow steps!

-^

learn by example

e

m q^

n p r

s t

u a b c d j f

k

i h j g

l

o

Trusses 7Lecture 8

Architectural Structures I

ENDS 231

S

Tools – Multiframe4D •^

in computer lab

Trusses 8Lecture 8

A

Tools – Multiframe4D •^

frame window^ –

define truss members

-^

or pre-defined truss

select points, assign supports

select members,assign section &assign pin ends

-^

load window^ –

select points,add point load