ban ve ket cau thep

16
BÀI GIẢNG VẼ CƠ KHÍ BÀI 6: BẢN VẼ KẾT CẤU THÉP Ths. Nguyễn Việt Anh

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Ban ve ket cau thep

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  • BI GING V C KH

    BI 6: BN V

    KT CU THP Ths. Nguyn Vit Anh

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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.

  • 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

  • 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.

  • 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.