Exam 30 October 2015 Questions

7/23/2019 Exam 30 October 2015 Questions

1/7

Delf t Universi tyofT e ch n o lo g y

Facul tyof Civ i l Engineeringand Geosc iences

Stee l Composi te S t ruc tu res

EXAi \^ S T E E L S T R U C T U R E S2: GlE4rJ5

Fr iday O ctober 30 2 15

1 3 . 3 0 -

16.30

hrs

Please fill inyou r name and stydeot nyinniber

on every answeringsheet that you hand in

Quest ion Points

1 Plasticity

la 3

lb 3

l c

3

Id 3

l e

3

I f

3

2 Stress strain relat ionship

2a 3

2b

3

3 stabi l i ty

3a 3

3b 3

4 Simple Joint

4a 3

4b 3

4c 3

4d

4

5 Welded beam

5a 3

5b 5

5c 4

5 Bolted connect ion

6a 3

6b

6

6c

2

6d 3

7 general quest ionsontubu lar struc tures

7a-h 12

8 CHS-X-joint

8a 5

8b 3

9RHS

to

H-section

9a 3

9b 4

9c 4

Total points 100


2/7

Delf Universi ty o f Teclnnology

Facul ty o f Civi l Engineering and Geosciences

Stee l & Compos i te S t ruc tu res

Xm S T E E L S T R U C T U R E S 2 :CE4 J J5

Friday, October 30, 2015

1 3 . 3 0 - 16.30 i irs

PLASTICITY

A ND

STABILITY

QUEST ION 1 Plas ticity

Sr

A


3/7

Del f t Univers i ty of Technology

Facul ty of Civ i l Engineer ing and Geosciences

Stee l

i

Compos i te St ruc tu res

E X A M S T E E L S T R U C T U R E S 2 : 0 1 1 4 1 1 5

Fr i day , O c tobe r 3 0 , 2 0 1 5

1 3 . 3 0 - 16 30 hrs

Q U E S T I O N

2

Stress=stra ira relai i i ionship

3 S y ] )

C J

Figure 2: One rectang ular cross sect ion mad e of

tv\/o

d i f fe re n t s tee l g rades , the s t ra in d is t r i bu t ion and

the s t ress -s t ra in re la t ions .

2a .

Ca lcu la te the bend ing m om en t in the c ross sec t ion fo r the g iven s t ra in d is t r i b u t ion no te tha t the

s t ress d is t r i bu t io n is re la ted to the s t ra in d is t r i bu t ion) .

2 b . Ca lcu la te the curva tu re o f a beam w i th th i s c ross sec t ion and fo r the g iven s t ra in d is t r i b u t io n .

Q U E S T 0 M 3

Stabil ity

o

Both f ram es in Figure 3 are load ed by a vert ical load F.

o A l l conne c t ions in po in t B a re

r ig id .

Frame I Frame 11

Figure 3

3 a .

Draw the buck l ing shape fo r F rame I and Frame II i n F igure 3 . Mo t i va te you r answer .

3 b .

Determine the Eu le r buck l ing load o f bo th s t ruc tu res . Mot i va te your answer .

- 2 -


4/7

Delf t Universi ty o f Tecf ino logy

Facul ty o f Civi l Engineering and Geosciences

Stee l

Composi te S t ruc tu res

EXAIViS T E E L S T R U C T U R E S 2 :

CJE4 -J - J5

Fr iday, October 3 0 ,

2015

1 3 . 3 0 - 1 6 . 3 0 i i r s

CONNECTBOWS

QUESTIOW

4 : S i m p l e J o i n t : b o l t e d c o n n e c t i o n w i t h p a r t i a l d e p t h e n d p l a t e

a

4 -

Bolt

row

1

Bolt row 2

Bolt row

3

HEA 200

50 1 50

10

80

45j

7 1

B o l t s M 2 0

70

- 23 1 T T

70 7

IPE3

180

m m

45I

Design bearing resistance of the bo l ts in th e end p la te :

Bo lt ro w 1: 138 l


5/7

Delf t Univers i tyofTe c hno logy

Faculty

of

Civ i l Engineer ing

and

Geosc iences

Stee l Compos i te S t ruc tures

E X A M S T E E L S T R U C T U R E S 2: C1E41 JS

Fr iday O ctober 30 2015

1 3 . 3 0 - 16.30hrs

QUESTiOW

5:

W e l de d beam

t

columtTijoiirli;

190mm

K

aweb

=

6 m m

HEA

32

afiange

=

9 mm

IPE450

45

11

II

II

M I

i I M

I M I

I

I i

I I

I

[

I

11 M

I 1 t

Steel grade: S355

HE A320

h= 310 mm

b

=

3 00

mm

t f = 15.5mm

t = 9 mm

r

= 27 mm

IPE450

h

=

4 5 0

mm

b= 190 mm

t f = 14.6

mm

t w

=9.4 mm

r

=

2 1

mm

5a Listallj o i n t c om p onen t s t ha t s hou ldbec ons ide redtod e t e r m i n ethebend ing m o m e n t

resis tanceof t h is jo in t .

5b Calculate

the

design tension res is tance

of the

c onnec t i on be t ween

the

f lange

of

t he beam

and

t he f lange

of

t he c o lum n .

5c Discuss

the

in f luence

of

co lumn s t i f f eners

on the

des ign bend ing moment res is tance

of

t h is jo in t .

=4 -


6/7

Delft U n i v e r s i tyofT e c h n o l o g y

F a c u l t y

of

C iv i l E n g i n e e r i n g

and

G e o s c i e n c e s

S t e e l

C o m p o s i t e S t r u c t u r e s

EXA IV l S T E E L S T R U C T U R E S

2:

GSE4 J15

F r i d a y , O c t o b e r

30 ,

2015

1 3 . 3 0 - 16.30 hrs

QUESTIOW : V omeiTiresis lLance Join c boled coiminiecliionwithereinided end p l a t e

? 1

2

HE300B

IPE500

e f f

r

S

170

+

6 5

80

70

70

7 0

IPE500

Steel grade: S355

HE300B

tf =

19 mm

t =

11 mm

r

= 27 mm

1PE500

tf =

16 mm

t =

10.2 mm

r

= 21 mm

End plate

tp= 20 mm

Welds

end

p la te

f lange

a

= 9 mm

Welds

end

p la te

web

a

= 6 mm

Bolts

M 2 0 , class

10.9

Non p re - l oaded

Holes w i th norm al

c learance

6a Ma ke sketches

of 4

possible y ie ld l ine pat terns

in the end

p la te

fo r the

bo l t

row 1.

6b Calculate

the

des ign tension res is tance

of the

bo l t

row 3 for the end

p la te . Assume

f f

3

m m for

you r calculat ion s.

6c Discuss wh ich bo l t

row

w i l l have

t he

h igher s t rength

for the end

p l a t e :

the row 2 or the row 3.

6 d W h a t

is a

c r it i ca l c om pone n t

in

case

of

a b r i t t le

and a

duc t i le fa i lu re

o f t h i s

t y pe

of

j o i n t ?

5


7/7

Delf t Univers i ty of Technology

Faculty of Civ i l Engineer ing and Geosciences

Steel & Composite St ructures

E X A M S T E E L S T R U C T U R E S 2 :

CiE41-il5

Fr iday , Oc tober 30 ,2015

1 3 . 3 0 -

16.30 hrs

T U B U L K S T K U C J y R E S

N D

F T I G U E

Q y E S T l O N

7

A ns wer t he ques t i ons i n t he t ab le be low . Copy y ou r ans wers t o y ou r a ns we r ing s he e t

h igher

o r

be t t e r

o r

m o r e

l o w e r

o r

w o r s e

o r

less

t he

s am e

o r

s im i la r

The buck l ing curve fo r a ho t - fo rmed ho l low sec t ions is . . . . t han

that fo r a co ld fo rmed ho l low sec t ion .

7b

The corner radius for cold formed RHS is general ly

hot f in ished ho l low sec t ions .

. . . than for

7c

For the same b h and t the cross sect ional area of a cold

formed RHS is general ly . . . . than that of a hot f in ished hol low

sec t ion

7 d

A CHS sect io n has a rat io be tw ee n the plast ic shear capaci ty

and the elast ic shear capaci ty than an RHS- sect ion.

7e

The cor ros ion pro te c t ion and main ten ance o f a c losed ho l low

sect ion is general ly

t han tha t o f an

l -sect ion.

7 f

The out -o f -p lane buck l ing res is tance o f ho l low sec t ion braces in

a la t t i ce g i rder w i th 1 sect ion chords is general ly .... t han tha t

w ith RHS sect ion chords .

7g

For an RHS jo in t , the to le rance in the cho rd th ickness to has for

chord punch ing shear fa i lu re a . . . . in f luence than fo r chord face

p las t i f i ca t ion .

7 h

The cho rd st ress redu ct io n (Qf) for ch ord ( face) plast i f ica t ion is

genera l ly f o r chord tens ion than fo r chord compress ion .

Exam 30 October 2015 Questions

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