ban ve ket cau thep
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Ban ve ket cau thepTRANSCRIPT
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BI GING V C KH
BI 6: BN V
KT CU THP Ths. Nguyn Vit Anh
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Bi 6
Bn v kt cu thp
6.1. Mt s khi nim
- Kt cu thp l kt cu c dng ph bin trong xy dng v cc thit b c kh. C ba loi kt cu thp c bn thng c s dng, gm c:
+ H thanh: gm cc thanh thp lin kt vi nhau trc tip hoc thng qua cc ph kin nh bn m, khp cu... H thanh c s dng to thnh cc cu kin nh khung ct, gin mi, dm cu...
+ H v: gm cc tm bn kim loi lin kt vi nhau to thnh cc thng, b cha, ni hi, ng dn...
+ H thanh v hn hp: kt cu s dng h thanh to nn khung chu lc, lp v hnh thnh nn cc b mt p ng nhu cu s dng, v d bn sn nh, bn sn cu thang thp, cnh ca van phng hoc van cung
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Bi 6
Bn v kt cu thp
6.2. Biu din mt s loi thp hnh thng dng
- Thp gc: gm loi u cnh v khng u cnh.
K hiu thp gc c dng: L b1 x b2 x s vi thp khng u cnh hoc L b x s i vi thp gc u cnh trong , b l chiu rng cnh, s l chiu dy cnh
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Bi 6
Bn v kt cu thp
6.2. Biu din mt s loi thp hnh thng dng
- Thp hnh mng(hay thp ch U, ch C): cc kch thc c bn gm chiu cao h, chiu rng b, b dy s, b dy trung bnh t
K hiu c dng: Cn
trong n l s hiu thp, tng ng vi chiu cao h
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Bi 6
Bn v kt cu thp
6.2. Biu din mt s loi thp hnh thng dng
- Thp ch I: cc kch thc c bn gm chiu cao h, chiu rng b, b dy s, b dy trung bnh t
K hiu c dng: In trong n l s hiu thp, tng ng vi chiu cao h
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Bi 6
Bn v kt cu thp
6.2. Biu din mt s loi thp hnh thng dng
- Mt s loi thp khc:
+ Thp trn c k hiu v ghi r ng knh , VD: 18
+ Thp vung c k hiu v ghi kch thc, VD: 16
+ Thp ng trn k hiu v ghi r ng knh , VD: 32 + Thp hp k hiu v kch thc, VD 25 hoc 25x50
+ Thp tm k hiu v chiu dy (trong mt s trng hp c th ghi kch thc khun kh trc b dy), VD 150x60x10
+ Mt s loi thp hnh khc k hiu theo hnh dng mt ct, VD ch T, ch H, ch Z...
- Ch :
+ S lng thp ghi trc k hiu mt ct, VD 2L50x2 + C th dng k hiu din t cu to cc thanh, VD 50x2 hoc 80x4, khi khng cn ghi s lng thanh trc k hiu
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Trong kt cu thp thng s dng hai loi lin kt chnh + Lin kt tho lp c: bng bulng, inh vt, ren... + Lin kt khng tho lp c: hn, inh tn
- Mt s k hiu bulng trong bn v kt cu thp
Bu lng lin kt c nh
Bulng lin kt tm thi
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Mt s k hiu inh tn thng dng
inh tn u chm hai pha
inh tn chm cu hai pha
inh tn na chm hai pha
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Mt s k hiu ng hn thng dng
Kiu ng hn Pha thy Pha khut
Hn i u khi ch to ti nh xng
Hn i u khi lp rp ti cng trng
Hn gc, hn ch T, hn chng khi ch to ti nh xng
Hn gc, hn ch T, hn chng khi lp rp ti cng trng
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Mt s k hiu mi hn thng dng
Loi mi hn
Vt u S ng hn
Mt ct mi hn K hiu S hiu
Hn i u
Khng vt
u
Mt pha
2
Hai pha
4
Vt u
Mt pha
5
Hn chp
Khng vt
u
Mt pha
C1
Hai pha
C2
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Mt s k hiu mi hn thng dng
Loi mi hn
Vt u S ng hn
Mt ct mi hn K hiu S hiu
Hn gc
Khng vt
u
Mt pha
G3
Hai pha
G5
Vt u
Mt pha
G6
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Bi 6
Bn v kt cu thp
6.3. Cc hnh thc lin kt c bn ca kt cu thp
- Mt s k hiu mi hn thng dng
Loi mi hn
Vt u S ng hn
Mt ct mi hn K hiu S hiu
Hn ch T
Khng vt
u
Mt pha
T1
Hai pha
T4
Vt u
Mt pha
T7
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Bi 6
Bn v kt cu thp
6.4. Bn v kt cu thp
H s bn v thp bao gm cc loi bn v sau:
- S cng trnh: th hin s kt cu cng trnh, s cc cu kin, cc thanh thp th hin dng nt n, ghi cc kch thc thit k c bn.
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Bi 6
Bn v kt cu thp
6.4. Bn v kt cu thp
H s bn v thp bao gm cc loi bn v sau:
- S lp t kt cu: ch r v tr tng i ca cc cu kin, kt cu cn lp ghp vo nhau, cc cu kin cn ghi k hiu
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Bi 6
Bn v kt cu thp
6.4. Bn v kt cu thp
H s bn v thp bao gm cc loi bn v sau:
- Bn v ch to: Bn v chi tit cc cu kin, cc nt lin kt, cc hnh biu din c th ch to.
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Bi 6
Bn v kt cu thp
6.4. Bn v kt cu thp
H s bn v thp bao gm cc loi bn v sau:
- Bn v ch to: Bn v chi tit cc cu kin, cc nt lin kt, cc hnh biu din c th ch to.