Notes on Truss Analysis | Architecture Structure | ENDS 231, Study notes of Environmental Science

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Trusses 1Lecture 8

Architectural Structures I

ENDS 231

ARCHITECTURAL

S^ TRUCTURES

I:

STATICS AND

S

TRENGTH OF

M

ATERIALS

ENDS 231DR.

A

NNE

N

ICHOLS

SPRING 2008 eight trussanalysis

lecture

Trusses 2Lecture 8

Architectural Structures I

ENDS 231

Method of Sections •^

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

Architectural Structures I

ENDS 231

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

k j

m l

o n

p q

r s

t u

2000b

Trusses 5Lecture 8

Architectural Structures I

ENDS 231

S2008abn

Graphical Analysis •^

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

Tools – Multiframe4D •^

in computer lab

Trusses 8Lecture 8

Architectural Structures I

ENDS 231

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