KONSTRUKSIONET PREJ DRURI II.pdf

8/21/2019 KONSTRUKSIONET PREJ DRURI II.pdf

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KONSTRUKSIONET PREJDRURI II

Konstruksionet e lameluara


2/110

Procesi teknologjik i DL Depoja e lnds s sharruar

Klasifikimi i lnds

Transporti deri n tertore

Terja e lnds

Prpunimi i lnds pr s gjati

Kontrolli i lnds

Lidhjet dhmbzore t lamelave

Ngjitja formimi i lamelave

Kondicionimi i lamelave Prgatitja e lamelave

Prgatitja e ngjitsit

Lyerja me ngjits


3/110

Procesi teknologjik i DL Transportimi i lamelave deri te presat

Prgatitja e presave

Vendosja e lamelave n presa

Vendosja e laminatit n shtypje

Kontrolli i shtypjes

Qndrimi, lirimi nga presat

Kontrolli i dimensioneve

Transporti deri te makinerit pr gdhendje

Kontrolli i kualitetit t ngjitjes Lyerja e laminatit me mjete mbrojtse

Prerja e laminatit me dimensione t projektuara

Prgatitja e laminatit pr transport dhe deponim


4/110

Veorit konstruktive t KL Karakteristika t larta mekanike

Mnyra industriale e prodhimit Ambiente kualitative akustike Mundsi t shfrytzimit:

Forma t ndryshme Sisteme t ndryshme statike

Prerje trthore t ndryshme

Forma vllimore t ndryshme

Mundsi e leht pr rritje t objekteve Ndjeshmri t vogl nga agjentt kimik Forma arkitektonike t atraktive


5/110

Prerjet trthore t laminatit

b


6/110

Rregullat teknike DIN pr laminat

min a = 6mm

a 33 mm

a 42 mm trajet e drejta

min a = 6mm

a 33 mm kur r1 200 a

a = 13 mm kur r1 = 150 a

h

MM

>h/6(min 2 lamela)

>h/6

(min 2 lamela)

a a > 25mm

b > 220 mm


7/110

Rregullat teknike DIN pr laminat Vazhdimi i lamelave

a

kontakti i

ngjitjes

kontakti i

ngjitjes

a

>20a

>45cm

>20a

>45cm

h

b

hb

a


8/110

Rregullat teknike DIN pr laminat Rrezja e kurbzimit

aEaWE

M

IE

M

r gmeano

dm

gmeanogmeano ,,

,

,,,,1

221

=

==

rm

r1

h

a

=r

h

kurbzimi a [mm]

r1

h

30

40

20

10

0200 190 170180 150160

a=13

a=33

gmeanodm E

r

a,,

1

,

2

=

mmaprarmmaprar

1315033200

1

1

==


9/110

Format e traut t thjesht

l

Forma

Sistemi statik

Hapsira q mbulon

m

Lartsia statike

h

h12,0.......25,0

(30,0)h=

l

17

l

16

H=

12,0.......25,0(35,0)

h

h= l

30

H

H

l30

h=

h

12,0.......30,0

(35,0)

H= l

16

H

l

30h=

h

H= l

1612,0.......30,0


10/110

Format e traut t thjesht

l

Forma

Sistemi statik

h

H

H

H

h

h

H


11/110

Trau i thjesht me lartsi konstante

Ma


22/110

Trajet e gjunjzuara

1..

..

.0.,

.0. +dym

dym

dczc

dc

ffk

1

,

, dv

dv

f

ycritc

kcyrel

f

..

.0.

, =

1,

finnet

net

u

u

2

,

2,

1

yrelyy

yc kkk +=

( ) 2,, 5,015,0 yrelyrelcyk ++=


23/110

Trajet e gjunjzuara

W

M

r

h

fr

h

drb

dfhb

A

U

drbdsbA

d

m

dtc

dtc

mm

dtc

NF

dtc

mNF

=

=

==

==

4

1

44

,90),(

,90),(

,90),(

,90),(

b

h

h/2

h/2

m

mds=rmd

d

rm

D D

Z Z

U

U

U

D

D

MM M

t,90,d

d


24/110

Trajet me lartsi t ndryshuar

2

,0,,90,

,0,

tan

tan

=

=

dcdc

dc

,

+ - -+ + -

1/tan

1

c,0,dc,90,d


25/110


hap

ha

l

lm

x

hx

b

q

Mmax

Mx

Map

m

ax,0,d

,0

,d

( )0=

dx

xd


26/110


( )

( )

( )

( )( )2

2

tan6/

2/

+

== xhb

xxlq

xW

xM

xa

( )6/2

/21/

/1/2

1/2/

2,0,

xx

xdm

maap

maap

ax

maap

m

hb

xlxq

W

M

llhh

llhhhh

mlhh

lx

==

+

+=

+

=

Pr traje simetrike

=

=

ap

aax

am

a

h

hhh

h

hl

x

2

2

Pr traje me nj ramje

aap

ap

x

aam

hh

hh

hh

lx

/1

2

/1

+

=

+=


27/110


010

m,

m,0

,

Prerja

trthore

( ) 2

2

,0,

641

bh

Mtg ddm +=

Kur

Skaji i poshtm

( ) 2

2

,0,

541

bh

Mtg ddm += Skaji i siprm


28/110

Trajet me lartsi t ndryshuarSkaji i poshtm

1.0.

.0.

dmdm

f

+

+

=shtypje

f

f

f

trheqje

f

f

f

f

dc

dm

dm

dt

dm

dm

dm

22

,90,

,

,

22

,90,

,

,

,,

cossin

cossin

1..

.. dm

dm

f

Skaji i siprm


29/110


hap

0.5 hap0.5 hap

0=

r

hap

1,

, dmr

dm

fk

2

,

,

6

ap

dap

ldmhb

Mk

=

1=rk

21

3

4

2

321

tan4.5tan4.11

0

++==

==

+++=

kk

r

h

k

kkkkkkkk

l

ap

ap

apapapl


30/110


dtdisdt fV

V

k ,90,

2.0

0

,90,

ku kemi:

kdis faktor i cili merr parasysh ndikimin e shprndarjes s sforcimeve n zonn emajs kulmarit, me vlerat vijuese

pr mbajtsit e drejt me skajin me dy rnje dhe mbajtsit harkore: kdis=1,4,dhe pr mbajtsit e gjunjzuar kdis=1,7

V0 vllimi krahasues prej 0,01 m3,

V Vllimi n zonn e majes n m3 (figura 5.2.4). Pr vlern maksimale t V duhett merret 2V/3, ku kemi Vb vllimi i tr mbajtsit.

hap

0.5 hap0.5 hap

blhh

hbV aps

ap

+

=

23

2

4

tan12

Sh b ll


31/110

Shembull

1.1

5

0.6

0

0.5

5

10 10

3.15

0.20

q d=10.4kN/m

5.22

Md=360kNm

Md=278kNm

5.8

5

104kN

104kN

Sh b ll


32/110

Shembull

Shkputja nga prkulja

17.087.1

3.1

/87.13.19.07.2

/3.1600200

101045.15.1

2,

23

=

Shembull


33/110

Shembull

Prkulja

mh

hlx

ap

a 22.515.12

60.020

2=

=

=

( )

2,

,

,

322

/3.150262.0

401.0

40178.1422.52

4.10

2

0262.06

887.02.0

6

887.015.1

60.0260.02

mMNW

M

kNmxlxq

M

cm

hb

W

mh

hhh

x

dx

dm

ddx

xx

ap

aax

===

===

=

=

=

=

=

=

Shembull


34/110

Shembull

Pjesa e majs s mbajtsit

22

,90,

,

,

,,

cossin +=

dc

dm

dm

dm

f

f

ff

( )

( )

192.04.16

1.15

/1.153.1515.3tan41

193.06.165.15

/5.153.1515.3tan41

/4.1615.3cos15.3sin81.36.16

6.16

/6.163.1

9.024

22

,,

22

,0,

2

0202,,

2

,


35/110

ShembullPjesa e prkulur n maje t mbajtsit

0.178.06.160.1

9.12

/9.1215.120.0

520.06093.1

5208

20

4.10

093.115.3tan4.515.3tan4.11

6

,

,

2

2,

2

,

2

1

2

,

,


36/110

Shembull 1Pjesa e trhequr n maje t mbajtsit

2

,90,

,2

,

,90,

/13.0093.1

011.09.12

011.015.3tan2.0

6

mMN

k

k

k

hb

Mk

dt

p

l

p

dm

ap

dap

pdt

==

==

=

=

Skaji i trhequr n maje t mbajtsit

( )

0.158.031.0

261.0

01.04.1

13.0

/31.03.1

9.045.0

3

2261.015.3tan25.0115.120.0

01.04,1

2.0

2

,90,

2

3

0

,90,

2.0

0,90,


37/110

Trajet e gjunjzuara-harkore me lartsi konstante

r rin

h=hap

apin hrr 5,0+=

1,

,

dmr

dm

fk

0=

( ) 2

,2

,

66.035.01

ap

dap

apapdmhb

Mkk

++=

r

hk

ap

ap =


38/110


b) Forcat trheqse

( ) 1

01.04.1 ,90,2.0

,90, dt

dt

fV

2

,

,90,625.0

ap

dap

apdthb

Mk

=

( ) totalapinap VhrhbV322

180

2 +=



39/110

r rin

hap

c

l/2 l/2

=h/2

h

c/2

hap

d

h1

e

( )

( )

2sin2

cos1tan2cos

cos1

cos

tan

2

1

1

ap

mm

map

m

hrr

cr

rch

dheh

rd

hh

ce

+=

=

+=+=

=

=

=

Trajet e gjunjzuara harkore me lartsi konstante



40/110


l/2 l/2

H1

H2

q

1

2

1H2

H1

v

H

s

+ +

M2

8

2

2

lqM

=



41/110


c

vvnet

vc

IE

slMu

sl

MIE

lq

MM

==

=

==

05.0

max,

max05.0

2

max2

8,4

412

52

8

( )

( )

ul

HHu

lHH

HHsM

sHMsHMIE

uuuu

HHnet

v

H

Hc

finnetvnetHnet

12,

12

12max

1max2max05.0

,,,

6,14

6,14

6,148,4

3

2212

52

+==

+=

+

=

+=

+=



42/110


Rastet e mbshtetsve

ha h<

ha < h

ha h=

Trajet e gjunjzuara-harkore me lartsi t ndryshuar


43/110

Trajet e gjunjzuara harkore me lartsi t ndryshuar

rrin

hap

1,

,

dmr

dm

fk

apin hrr 5,0+=a) prkulja

2

,

,

6

ap

dap

ldm hb

Mk

=

r

hk

ap

ap =

2

4

2

3

2

21

3

4

2

321

tan6

tan8,7tan3,86,0

tan835,0

tan4.5tan4.11

=

+=

=

++=

+++=

k

k

k

k

kkkkkkkk apapapl

Trajet e gjunjzuara-harkore me lartsi t ndryshuar


44/110

j gj j y

b) Forcat trheqse

( ) 1

01.04.1,90,

2.0

,90,

dt

dt

fV

( ) ( ) totalinapin VrhrbV 32180cos cossin 22

++=

2

,

,90,

6

ap

dap

pdthb

Mk

=

r

hk

ap

ap=

2

7

2

6

5

2

765

tan4tan1,2

tan6,2tan5,125,0

tan2,0

=

+=

= ++=

k

k

kkkkkkk apapp

Shembull 2


45/110

q

10.00 10.00

6.00

1.4

2

1.6

34.93

1.0

6

12

10

8

10.22

Bd Cd

kNCB

mkNq

m

mkNq

QGq

dd

d

d

kQkGd

1042/204,10

/4,1085,577,1

85,5

/77.175,05.148.035,1 2

=====

==+=

+=

a) shkputja


46/110

a) shkputja

159,087,1

1,1

/87.13,1

9,07.2

/1.1700200

10104

5,15,1

2

,

23


47/110

mmmmfb

Bl

mmNf

dc

dBerf

dc

18013487,3200

10104

/6,163,1

9,024

3

,,

2

,0,

==

=

==

b) prkulja pr sforcime maksimale

( )

2

,

32

00

00

1

/9,100354,0

386,0

38607,1593,42

4,10

0354,06/03,120,0

03,12

812cos05,1

05,142,1

70,0270,0

39,442,12

70,020

42,18tan12tan0,1070,0

mMN

kNmM

mW

mh

mh

mx

rrezikshmeemprerjamh

dm

x

x

x

x

==

==

==

=+

=

=

=

=

=+=

c) prkulja n mes t hapsirs


48/110

( ) ( )

( )

( )

167,06,161,11

/1,119,104tan41

/6,16

166,03,16

7,10

/7,109,104tan41

/3,16

812cos812sin81,3

6,16

6,16

202

,0,

2

,0,

202

,,

2

002002,,


49/110

151,06,16

5,8

1

240653033,0

56,21

33

/5,863,120,0

520,0645,1

5208

204,10

45,1

4,22

63,1271,0

4,22

63,1012,2

4,22

63,1350,1542,1

56,218sin2

6

271,012tan6

012,212tan8,712tan3,86,0

350,112tan835,0

542,112tan4,512tan4,11

6

2

2,

2

,

32

01

024

020

3

0

2

020

1

2

,

,

==

=

=

=

==

=

+

+=

=

==

==

=+=

==

=++=

=

r

in

dm

dap

l

in

ap

dap

ldm

k

a

r

mmalamelaetprvetsoh

mMN

kNmM

k

mrr

k

k

k

k

hb

Mk

e) forcat trheqse


50/110

( ) ( )

( )!148,1

31,07,1

01,07,1

28,0

7,1

180

856,21

812cos

1290sin8sin63,156,2120,0

01,0;7,1

/28,045,1

0474,05,8

0474,04,22

63,12656,0

4,22

63,10486,00425,0

2656,012tan412tan1,2

0486,012tan6,212tan5,125,0

0425,012tan2,0

6

2,0

3

0

02

00

0002

3

0

2

,90,

2

0207

020

6

0

5

2

,

,90,

>=

=

+=

==

==

=

++=

==

=+=

==

=

mV

mVk

mMN

k

k

k

k

hb

Mk

dis

dt

p

ap

dap

pdt

f) prkulja nga epja-shtypja


51/110

( )

( ) ( ) ( )

166,06,161

9,10

/8,44

11500

720

12905000

9200200

175,073,08,44

24

29,18tan12tan25,870,0tantan

25,80,565,010,5

,0,

,

22

00

11

1


52/110

mml

mmf

mmmAGkMf

mmmIE

kslMf

kNmM

prhershmeengarkesatngaprkuljesimomenti

kNmM

prkohshmeengarkesatngaprkuljesimomenti

kkkk

h

hmAmI

p

amean

vapp

v

amean

mapp

m

ap

ap

vm

aaa

7,66300

6,310,26,29

0,2100,214,0720

77,0219,02,12,1

6,29106,2910717,5115008,4

21,014,1020219,0

8,4

1408

20

85,548,0

2198

2085,575,0

77,0;21,0

03,2;14,0;10717,5

3

3

3

,0

2

2

1243

=


53/110

Ramet e Lamaluara

Ramet n form V

l


54/110

Ramet e Lamaluara

Lidhja e rigelit me shtylln

R L l


55/110

Ramet e Lamaluara

Lidhja e rigelit me shtylln n form t dhmbzuar

hi

hi

30-50cm

hi

hi

1..

..

.0.,

.0. +dym

dym

dczc

dc

ffk

6

8,0

8,0

2

in

in

hbW

hbA

=

R t L l


56/110

Ramet e Lamaluara

Lidhja e rigelit me shtylln n form t dhmbzuar

/2

/2

Kr

KrFa

Fa

/2

/2

Kr

Kr

Fa

Fa

2

90

2

0

==

4

90

4

0

==

R t L l


57/110

Ramet e Lamaluara

Lidhja e rigelit me shtylln me mjete lidhse gjemba

N rregull Nuk lejohet

R t L l


58/110

Ramet e Lamaluara

Lidhja e rigelit me shtylln me mjete lidhse gjemba

H

V

M

QR

NR

q

NR

QR

V

H

Dv

V

DN

NR

DH

H

QR

DQ

M

D2M

D2M

D1M

D1M

D1M

D1M

D1M

r2

r1

Ramet e Lamal a a


59/110

Ramet e Lamaluara Lidhja e rigelit me shtylln me mjete lidhse gjemba

Forcat

Momentet e prkuljes

Shtylla Rigeli

21 nn

VDV +=

21 nn

ND RN +=

21 nn

HDH +

=21 nn

QD RQ +

=

( )2222111

1

1

1

2

221

1

2

11

222111

1

2

12

1

2

1

2

rnrnr

DM

Dr

rnD

r

rn

rnDrnDM

r

rDD

r

r

D

D

M

MM

MM

MM

M

M

+=

+=

+=

=

=2

22

2

11

11

rnrn

rMD M +

=

Prgjithsisht

( )

=2

11

ii

Mrn

rMD

Ramet e Lamaluara Lidhja e rigelit me shtylln me mjete lidhse gjemba


60/110

DQ

DN

DV

D1M

D1M

D1M

D1M

D

KONSTRUKSIONET PREJ DRURI II.pdf

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Transcript of KONSTRUKSIONET PREJ DRURI II.pdf