Vi Du Tinh Dam LT Bang Sap2000 v10

V DU TNH TOA N H DM LIN TUC BNG CHNG TRNH SAP2000

V DU TNH TOA N H DM LIN TUC BNG PHN MM SAP2000I/ S liu :

1. Cho h dm lin tuc bng b tng M.250# co :

- Modulus an hi :E = 2.650.000 T/m2;

- H s Poisson :

= 0,2;

- Cng chu nen :Rn = 110 kG/cm2;

- Cng chu keo:Rk = 8,8 kG/cm2;

Ct thep doc loai AII cocng : Ra = Ra = 2700 kG/cm2;

Ct ai loai AI co cng : Ra = 1700 kG/cm2.

2. Tai trong tac dung vao dm gm co:

* Tnh tai: (a k n trong lng ban thn cua dm)

(S liu bn di la kch thc tit din dm: hnh ch nht b x h)

* Hoat tai:

3. Yu cu:

- Xac nh ni lc trong h khi chu cac trng hp tai trong (cn phn tch hoat tai thanh cac trng hp t hp ni lc).

- T hp ni lc va ve biu bao ni lc.

- Tnh ct thep doc trong dm.

II/ Cac bc tin hanh:

1. Phn tch hoat tai thanh cac trng hp tac dung ring le trn tng nhp:

Do tnh cht cua hoat tai la co th thay i nn cn phn tch hoat tai thanh cac trng hp ring le, mi trng hp hoat tai ch tac dung trn mt nhp, sau o se tin hanh t hp xac nh gia tr ln nht va nho nht cua ni lc (hoc phan lc) do hoat tai gy ra trn h.

T s liu hoat tai a cho ta phn tch c 6 trng hp hoat tai nh sau:

* Hoat tai 1:

* Hoat tai 2:

* Hoat tai 3:

* Hoat tai 4:

* Hoat tai 5:

* Hoat tai 6:

2. Lp s hnh hoc:

- Khi ng chng trnh Sap2000.

- Chon h n v T-m-OC:

- Vao Menu File ( chon lnh New Model ...:

Chon h dm lin tuc (Beam).

- Khai bao s nhp dm va chiu dai cac nhp:

Phn console cung khai bao nh 1 nhp, sau nay ch vic bo i gi ta u la c oan console.

Nh vy khai bao h dm se co 6 nhp, chiu dai mi nhp se c khai bao cu th trong muc Edit Grid ( nhp c chiu dai cho tng nhp ring bit, phai chon muc Use Custom Grid Spacing and Locate Origin, sau o chon Edit Grid...)

Trong phn Edit Grid ta chon kiu Spacing nhp khoang cach cac li:

- Ta c h dm nh hnh sau:

Trn man hnh co 2 ca s xem h di 2 goc nhn khac nhau: theo hnh chiu 3D (khng gian) va theo hnh chiu 2D (mt phng XZ).

Ta co th vao menu Options ( Windows chon s lng ca s trn man hnh xem h theo cac goc khac nhau (1, 2, 3, hoc 4 ca s c th hin trn man hnh). i vi h phng, nhn h cho c ro ta nn ch chon s ca s bng 1 (), va chon goc nhn la hnh chiu 2D - mt phng XZ ().

(Cac nut lnh chon goc nhn )

trn man hnh khng th hin cac ng li ta nhn phm F7 (trn ban phm), khng th hin h truc toa ta vao menu View ( Show Axes ()

- Khai bao lin kt gi :

Cac gi trong h nh trn cha ung vi bai toan t ra :

* Cn thay lin kt gi 2 u console bng lin kt t do (trong Sap2000 bo lin kt gi phai thc hin lnh t lin kt, nhng la lin kt t do) .

* Thay gi truc B bng gi c nh.

thay lin kt gi tai 1 hoc 1 s nut trong h, cn chon nut hoc s nut o bng cach bm chut vao v tr cac nut o hoc r chut xung quanh cac nut mun chon. Sau khi chon, vao menu Assign ( Joint ( Restraints () hoc bm vao biu tng ()

Sau khi chon nut va bm vao biu tng se xut hin hp thoai cho phep khai bao lin kt gi (hoc bo lin kt gi)

Nh vy, ta chon cac nut tai truc A va G, bm vao biu tng , chon ( chon hoan thanh.

Tip tuc chon nut tai truc B, bm vao biu tng , chon ( chon hoan thanh.

Ta c h nh sau:

Nh vy, ta a tao c s tnh cua h dm ( phn nay, ta phai tao c 1 h dm co kch thc cac nhp va lin kt gi theo yu cu)

3. Khai bao cac thuc tnh cua h :

a. Khai bao thuc tnh vt liu : vao menu Define ( Materials ...()

H dm tnh toan bng b tng nn chon loai vt liu la CONC ( Modify/Show Material... sa lai cac gia tr :

* Khi lng ring : ch dung trong bai toan dao ng.

* Trong lng ring : tnh tai trong do trong lng ban thn cua h kt cu.

* Modulus an hi : dung tnh cng kt cu, tnh/kim tra bin dang - vong.

* H s Poisson : h s bin dang ngang, co anh hng rt ln n kt qua i vi kt cu tm - vo hoc khi.

* H s dan n nhit : dung tnh bin dang, ni lc do s thay i nhit .

* Cng ct thep va cng b tng : dung tnh toan, thit k lng ct thep cn dung trong cu kin b tng ct thep.

i vi h dm a cho, ta a tnh trong lng ban thn cua h vao trong trng hp Tnh tai, nn y ta khng quan tm n trong lng ring. Nh vy thng ta ch quan tm n cac gia tr E ; , nu dung Sap2000 tnh ct thep th phai nhp fc; fy; fys;

H dung: B tng M.250# co : E = 2.650.000 T/m2; = 0,2.

fc = 2244.0 T/m2;

Ct thep AII co:

fy = fys = 3176.47 T/m2

Do Sap2000 tnh toan ct thep theo cac tiu chun nc ngoai nn co 1 cach c ngh y la s dung tiu chun Canada nhng nhp cac gia tr cng b tng va cng ct thep tng ng vi TCVN theo bang sau:

Bng 1 : Gi tr tng ng vi mc b tng theo TCVNMc B tng150200250300350400500600

Rn (kG/cm2)6590110130155170215250

f'c (kG/cm2)130.39182.22224.40267.26321.85355.16457.85540.81

f'c (T/m2)1303.91822.22244.02672.63218.53551.64578.55408.1

Bng 2 : Gi tr tng ng vi loi ct thp theo TCVNLoi thpAIAIIAIIICICIICIII

Ra (kG/cm2)210027003600200026003400

fy (kG/cm2)2470.593176.474235.292352.943058.824000.00

fy (T/m2)24705.931764.742352.923529.430588.240000.0

Chon chp nhn cac gia tr thng s cua vt liu a nhp, chon tip thoat khoi lnh khai bao thuc tnh vt liu.

b. Khai bao hnh dang va kch thc tit din :

Theo bai : h dm co 2 loai tit din

* Nhp D-E-F :

co tit din hnh ch nht b = 0,2m ; h = 0,4m.

* Cac nhp con lai : co tit din hnh ch nht b = 0,2m ; h = 0,35m.

khai bao cac loai tit din trong h : vao menu Define ( Frame Sections ... ():

Mun thm vao loai tit din mi co dang hnh ch nht : Bm vao menu trai xung, chon Add Rectangular

Chon

Ta khai bao mi 2 loai tit din :

+ Loai tit din hnh ch nht 0,2 x 0,35 m se co cac thng s :

* Tn :

DCN20x35

* Vt liu :CONC

(B tng)

* Chiu cao : 0,35

* Chiu rng :0,2

+ Loai tit din hnh ch nht 0,2 x 0,4 m se co cac thng s :

* Tn :

DCN20x40

* Vt liu :CONC

(B tng)

* Chiu cao : 0,4

* Chiu rng :0,2

*Chu y : Khi vt liu la loai CONC th se xut hin nut lnh khai bao cac thng s phuc vu vic tnh ct thep (nu ch cn kt qua ni lc th khng quan tm)

Bm chp nhn cac thng s tnh ct thep, bm chp nhn cac thng s cua tit din.

Tip tuc khai bao thm cac loai tit din khac ( y cn khai bao thm loai tit din DCN20x40) mt cach tng t, ta co th chon loai tit din DCN20x35 va khai bao va chon tao loai tit din mi trn c s loai tit din DCN20x35, sau o ch cn sa lai tn tit din va chiu cao. Bm , ta c loai tit din mi la DCN20x40.

Bm chp nhn cac loai tit din va khai bao mi.

c. Khai bao cac trng hp tai trong :

phuc vu vic t hp ni lc trong dm ta cn phn tch Hoat tai thanh 6 trng hp nh a trnh bay phn trn (HT1, ..., HT6) va trng hp Tnh tai.

Do tai trong cua phn Tnh tai a tnh n trong lng ban thn cua h, nn y ta khng khai bao cho Sap2000 t ng cng thm trong lng ban thn cua h na.

khai bao cac trng hp tai trong : vao menu Define ( Load Cases ... ()

+ i vi trng hp Tnh tai :

* Tn : TinhTai

* Loai : DEAD

* H s TLBT : 0

Sau khi sa gia tr ( chon Modify Load ()

+ i vi trng hp Hoat tai 1,2,3,4,5,6 :

* Tn : HT1 (hoc 2,3,4,5,6)

* Loai : LIVE

* H s TLBT : 0

Sau khi sa gia tr ( chon Add New Load ().

Kt qua c bang cac trng hp tai trong nh hnh sau:

Chon chp nhn.

d. Khai bao cac trng hp phn tch :

Vao menu Define ( Analysis Cases ... ()

Bnh thng nu khng xet dao ng th mi trng hp phn tch se tng ng vi mt trng hp tai trong va nn xoa trng hp phn tch ng (MODAL) khi tnh toan c nhanh hn.

e. Khai bao t hp tai trong (t hp ni lc) :

Trong Sap2000 co 4 loai t hp :

(1) Loai ADD: Cng ai s .

(2) Loai ENVE : Ly gia tr bao.

(3) Loai ABS

: Cng theo gia tr tuyt i.

(4) Loai SRSS: Ly cn bc hai cua tng cac bnh phng.

Thng s dung 2 loai t hp (1) va (2).

V du :

Co 5 trng hp tai trong : TT1; TT2; TT3; TT4; TT5.

- Gia tr Moment tai K : MK do TT1 la : 3,5

- Gia tr Moment tai K : MK do TT2 la : -4,0



- Gia tr Moment tai K : MK do TT5 la : -3,0

Nu khai bao T hp 1 la t hp kiu ENVE cua TT1; 0,9*TT2; 0,9*TT3:

TH1 = ENVE (TT1; 0.9*TT2; 0.9*TT3)

ta se c MK max cua TH1 = 4,5 va MK min cua TH1 = -3,6

Nu khai bao T hp 2 la t hp kiu ADD cua TT4; TT5; TH1 :

TH2 = ADD (TT4; TT5; TH1)

ta se c MK max cua TH2 = 6 va MK min cua TH2 = -2,1

Trong dm ta cn t hp ni lc theo cng thc :

co c t hp nay :

+ Trc tin ta khai bao cac T hp Hoat tai bin i :

HT1 ( HTBD1 = ENVE (HT1; 0*TT) v.v.

Nu HT1 co du "+" th HTBD1 se co gia tr Max = HT1 ; gia tr Min = 0

Nu HT1 co du "-" th HTBD1 se co gia tr Max = 0 ;

gia tr Min = HT1 v.v.

+ Sau o ta khai bao T hp Bao :

Bao = ADD (TT; HTBD1; HTBD2; . . . ; HTBD6)

Nh vy gia tr Max cua T hp Bao se la gia tr tng cua Tnh tai vi cac gia tr Hoat tai nu "+" , con nhng gia tr Hoat tai "-" se c thay bng gia tr 0. Tng t gia tr Min cua T hp Bao se la gia tr tng cua Tnh tai vi cac gia tr Hoat tai nu "-" , con nhng gia tr Hoat tai "+" se c thay bng gia tr 0. y chnh la T hp cn tm, va se la t hp tnh ct thep.

khai bao cac t hp tai trong : vao menu Define ( Combinations ... ()

Chon

khai bao t hp HTBD1 la t hp kiu ENVE cua HT1 va 0*TT :

* t tn t hp : HTBD1;

* Chon kiu t hp : Envelope ();

* Chon thanh phn : TinhTai (DEAD); Sa h s nhn : 0,00001(bm

Nu h s nhn c nhp bng 0 th Sap2000 se bo qua thanh phn o (xem nh khng co thanh phn o trong t hp, do o ta phai nhp vao 1 s v cung be nao o, v du nh 0,00001)

* Chon thanh phn : HT1;

Sa h s nhn : 1( bm

Chon chp nhn

Tip tuc chon thm vao cac t hp HTBD2, HTBD3, HTBD4, HTBD5, HTBD6, cach tin hanh tng t nhng thay thanh phn HT1 bng thanh phn hoat tai tng ng (HT2; HT3; HT4; HT5; HT6).

Khai bao t hp BAO

* t tn t hp : BAO;

* Chon kiu t hp : Linear Add;

* Chon thanh phn : TinhTai (DEAD); H s nhn : 1( bm nut

* Chon thanh phn : HTBD1 ;

H s nhn : 1( bm nut

.........................................................................................................................

* Chon thanh phn : HTBD6 ;

H s nhn : 1( bm nut

Chon chp nhn. Ta c cac t hp nh sau:

Chon chp nhn.

4. Gan cac c trng cho cac phn t trong h :

Nguyn tc chung : cn chon i tng trc ri mi thc hin lnh gan.

Chon cac i tng bng cach bm chut trc tip vao i tng hoc r chut bao quanh i tng o.

Gan tit din cho cac thanh trong h :

* Chon cac thanh dm nhp A-B-C-D va nhp F-G

* Thc hin lnh gan : vao menu Assign ( Frame/Cable ( Sections ... (), hoc bm vao biu tng trn Toolbar.

Tng t chon cac thanh dm trong nhp D-E-F va gan cho loai tit din la DCN20x40

5. Gan tai trong tac dung :

a. Tai trong tp trung tai nut :

Chon nut, vao menu Assign ( Joint Loads ( Forces ... (), hoc bm vao biu tng

b. Tai trong phn b u trn thanh:

Chon thanh, vao menu Assign ( Frame Loads ( Distributed ... (), hoc bm vao biu tng

c. Tai trong phn b dang 4 im trn thanh:

Chon thanh, vao menu Assign ( Frame Loads ( Distributed ... (), hoc bm vao biu tng

d. Tai trong tp trung trn thanh:

Chon thanh, vao menu Assign ( Frame Loads ( Point ... (), hoc bm vao biu tng

Ap dung gan tai trong cho cac trng hp trong h :

* Tnh tai :

- Lc tp trung:

Chon nut truc A va G, bm , (Load Case Name la TinhTai), t gia tr Force Global Z = -1,2.

- Lc phn b u:

+ Chon thanh nhp AB va FG , bm , (Load Case Name la TinhTai, Direction la Gravity), t gia tr Uniform Load = 0,6.

+ Chon thanh nhp BC, bm , (Load Case Name la TinhTai, Direction la Gravity), t gia tr Uniform Load = 1,8.

+ Chon thanh nhp CD, bm , (Load Case Name la TinhTai, Direction la Gravity), t gia tr Uniform Load = 1,5.

+ Chon thanh nhp DE, bm , (Load Case Name la TinhTai, Direction la Gravity), t gia tr Uniform Load = 2.

- Lc phn b dang 4 im:

Chon thanh nhp EF, bm , (Load Case Name la TinhTai, Direction la Gravity), chon kiu khoang cach la Absolute - tuyt i.

Nhp 4 im:.im 1: khoang cach 0 (m), gia tr lc 1.2 (T/m)

im 2: khoang cach 2.4 (m), gia tr lc 1.2 (T/m)


im 4: khoang cach 6 (m), gia tr lc 1.5 (T/m)

Chu y t tai trong muc Uniform Load = 0 (nu khng tai trong dang 4 im se cng vi tai trong phn b u cung tac dung ln h)

- Lc tp trung trn thanh:

Chon thanh nhp EF , bm , (Load Case Name la TinhTai, Direction la Gravity), chon kiu khoang cach la Absolute - tuyt i.

Nhp tai trong tp trung: (ch co 1 lc) khoang cach 2.4 (m), gia tr lc 4 (T)

* Hoat tai 1:

- Lc tp trung:

Chon nut truc A, bm , Chon Load Case Name la HT1, t gia tr Force Global Z = -0,6

- Lc phn b u:

Chon thanh nhp AB, bm , Chon Load Case Name la HT1, Direction la Gravity, t gia tr Uniform Load = 0,3. Chu y cho cac gia tr cua tai trong dang 4 im bng 0.

* Hoat tai 2:

Lc phn b u:

Chon thanh nhp BC, bm , Chon Load Case Name la HT2, Direction la Gravity, t gia tr Uniform Load = 0,8.

* Hoat tai 3:

Lc phn b u:

Chon thanh nhp CD, bm , Chon Load Case Name la HT3, Direction la Gravity, t gia tr Uniform Load = 0,6.

* Hoat tai 4:

Lc phn b u:

Chon thanh nhp DE, bm , Chon Load Case Name la HT4, Direction la Gravity, t gia tr Uniform Load = 1.

* Hoat tai 5:

- Lc tp trung trn thanh:

Chon thanh nhp EF , bm , Chon Load Case Name la HT5, Direction la Gravity), chon kiu khoang cach la Absolute - tuyt i.

Nhp tai trong tp trung: (ch co 1 lc) khoang cach 2.4 (m), gia tr lc 2 (T)

- Lc phn b dang 4 im trn thanh:

Chon thanh nhp EF, bm , Chon Load Case Name la HT5, Direction la Gravity), chon kiu khoang cach la Absolute - tuyt i.

Nhp 4 im:.im 1: khoang cach 0 (m), gia tr lc 0.5 (T/m)



im 4: khoang cach 6 (m), gia tr lc 0.6 (T/m)

Chu y t tai trong muc Uniform Load = 0 (nu khng tai trong dang 4 im se cng vi tai trong phn b u cung tac dung ln h)

* Hoat tai 6:

- Lc tp trung:

Chon nut truc G, bm , Chon Load Case Name la HT6, t gia tr Force Global Z = -0,6

- Lc phn b u:

Chon thanh nhp FG, bm , Chon Load Case Name la HT6, Direction la Gravity, t gia tr Uniform Load = 0,3. Chu y cho cac gia tr cua tai trong dang 4 im bng 0.

Lu y : do trn man hnh ch hin th 1 loai tai trong, nn sau khi khai bao tai trong phn b th trn man hnh hin th tai phn b th se khng "thy" cac lc tp trung. iu nay la bnh thng.

Nu mun xem y u ca tai tp trung va tai phn b trn man hnh th vao menu Display ( Show Loads Assign ( Frame ... ()

Chon Trng hp tai trong cn xem lc tac dung.

6. Chay chng trnh tnh :

- Khai bao cac dang kt cu: vao menu Analyze ( Set Analysis Options ... ()

H dm cung c coi la h khung phng (kt cu chu un trong XZ) nn ta chon :

- Chay chng trnh tnh : vao menu Analyze ( Run Analysis (hoc bm )( chon

Nu ta cha save file s liu Sap2000 nay, th trc khi chay chng trnh tnh, Sap2000 se t ng save va se hoi tn file, ta nhp tn file s liu cho Sap2000.

Chng trnh tnh sau khi chay

Nu thy dong cui cung la ANALYSIS COMPLETE th s liu nhp vao khng b li va chng trnh tnh a xac nh c ni lc trong h.

Sau khi chay chng trnh tnh th Sap se khoa s liu (biu tng khoa trn man hnh se ong lai ), nu mun sa s liu a nhp th phai m khoa bng cach bm vao biu tng , luc o se tr thanh )

7. Xem kt qua phan lc, ni lc :

- Xem kt qua phan lc : vao menu Display ( Show Forces/Stresses ( Joints ... (hoc bm vao du mui tn trn biu tng ( chon Joints)

Xem phan lc theo dang lit k gia tr

Xem phan lc theo dang mui tn lc (Show as Arrows)

- Xem kt qua ni lc : vao menu Display ( Show Forces/Stresses ( Frames/Cables ... (hoc bm vao du mui tn trn biu tng ( chon Frames/Cables)

Do Sap2000 quy nh du lc ct ngc du vi quy nh du cua VN, nn khi xem biu lc ct trong phn khai bao ty l ta chon ty l mang du -, c biu ung quy nh.

Biu moment Q2-2 cua Tnh tai (a chnh ty l -)QUY C DU NI LC TRONG SAP

Nh vy M3-3 # moment M; V2-2 # lc ct Q nhng trong thanh ngang (dm) th V2-2 ngc chiu Q, trong thanh ng V2-2 cung chiu Q; P # lc doc N.

8. In kt qua phan lc, ni lc :

- In biu ang hin th trn man hnh : vao menu File ( Print Graphics (), hoc bm vao biu tng

- In gia tr phan lc va ni lc ra file Excel x ly s liu tnh: vao menu Display ( Show Table...

a. Chon d liu xut kt qua:

- Phan lc: ANALYSIS RESULTS ( Joint Output ( Reactions ( Table: Joint Reactions.

- Ni lc trong thanh: ANALYSIS RESULTS ( Element Output ( Frame Output ( Table: Element Forces - Frames

b. Chon Trng hp tai trong hoc t hp tai trong xut kt qua ()

Chon cac trng hp tai trong: Tnh Tai (DEAD), Hoat Tai t 1-6 (HT1, HT2, ..., HT6). (Gi phm Crtl khi nhn chut chon c nhiu trng hp), chon OK chp nhn.

Chon OK xut kt qua.

Vao menu File ( Export all Table () ( To Excel () xut kt qua sang Excel. Chon Done () tr v man hnh Sap2000.

9. Thit k ct thep :

- Chon tiu chun thit k: nh a trnh bay phn trc, do Sap2000 tnh ct thep theo cac tiu chun nc ngoai nn co th s dung cach dung tiu chun cua Canada nhng nhp cng theo bang s 1 va bang s 2 (quy i cng b tng va ct thep theo TCVN).

Vao menu Options ( Preferences.. ( Concrete Frame Design ... ()

- Chon cac t hp ni lc dung tnh ct thep : vao menu Design ( Concrete Frame Design ( Select Design Combos... ()

Khai bao t hp BAO la t hp dung thit k ct thep.

Chon t hp DCON1, DCON2 bn phai (

Chon t hp BAO bn trai (

- Tnh ct thep : vao menu Design ( Concrete Frame Design ( Start Design/Check of Structure ()

Trn man hnh se hin th gia tr ct thep doc tnh toan mt trn va mt di cua dm tai cac tit din trn h vi n v m2 nn rt kho xem:

Do o nn i h n v sang din ct thep th hin vi n v cm2.

Kt qua tnh ct thep doc

Nh vy :

- Tai tit din trn gi A ct thep tnh toan :

- Tai tit din gia nhp AB ct thep tnh toan :

.v.v.

Ta co th kim tra kt qua b tr ct thep bng Sap2000 vi kt qua tnh toan ct thep "thu cng" da vao biu bao moment cua dm:

Dm lin tuc

Bm vao menu trai xung

Chon n v Ton, m, C

(S nhp)

Chon muc nay, sau o nhn vao y

(Co t thm gi ta vao nut)

1. Chon Spacing

H truc toa

Cac ng li

Gi ta c nh

Gi ta di ng

Chon nut bng cach bm chut vao v tr cac nut hoc r chut quanh cac nut o

Khai bao tng lin kt ngn can chuyn v thng theo phng X; Y; Z

Khai bao tng lin kt ngn can chuyn v xoay quanh truc X; Y; Z

Khai bao nhanh lin kt :

Ngam; Gi c nh;

Gi di ng; T do

1. Chon loai vt liu chnh sa cac thng s :

CONC : B tng

STEEL : Thep

........................

2. Sa i cac thng s mc nh cua vt liu

Khi lng ring (

Trong lng ring w

Modulus an hi E

H s Poisson

H s dan n nhit

Modus an hi trt (may t tnh) G

Cng chu keo ct thep

Cng b tng

Cng chu ct ct thep

Biu moment M3-3 cua Tnh tai

1. Chon hnh dang tit din cn thm.

Chon Show as Arrow biu din phan lc di dang mui tn lc.

Bo chon se biu din phan lc di dang lit k gia tr

2. Khai bao thm loai tit din vi hnh dang c chon trn

Danh sach cac loai

tit din a khai bao

3. Khai bao khoang cach va gia tr cua tai trong tp trung (mi ln t c ti a 4 lc)

Co 2 cach khai bao khoang cach: theo Relative - tng i (= a/l) va theo Absolute - tuyt i (=a)

4. Chon phng an:

b. Thay tai trong a co bng tai trong nay

a. Thm tai trong nay vao tai trong a co

2. Khai bao phng cua lc.

Gravity : phng trong lc, chiu dng hng xung

1. Chon trng hp tai cua tai trong cn t lc




3. Khai bao khoang cach va gia tr cua tai trong phn b tai 4 im.

Co 2 cach khai bao khoang cach: theo Relative - tng i (= a/l) va theo Absolute - tuyt i (=a)



4. Chon phng an:

5. Chu y cac gia tr nay phai bng 0

5. Chu y cac gia tr nay phai bng 0

4. Chon phng an:



3. Chon phng an:

Lp lai bc 3 va 4 cho cac thanh phn khac

Chon xoa

Chon trng hp Modal

Phn s liu a nhp (c chp nhn)

Phn nhp s liu

Ta chon loai cu kin la dm, khoang cach a cua lp ct trn va di bng nhau

a = 0,04m # 4 cm

Khai bao t hp dung tnh ct thep.

+ Chon t hp bn trai va bm Add thm t hp o vao t hp thit k.

+ Chon t hp bn phai va bm Remove loai t hp o khoi t hp thit k

BIU BAO MOMENT (n v T.m)

Cac t hp do ta khai bao

Cac t hp mc nh cua Sap2000

(khng dung)

3. Bo chon muc nay

2. Chon cac trng hp hoc t hp tai trong xut kt qua

1. Chon d liu xut sang Excel

Bm vao du + m rng cy kt qua

Chon tiu chun CSA-A23.3-94

Th cng

Th ep

Lc ct V3-3

Lc ct V3-3

Moment un M2-2

(theo chiu vn nut chai)

Moment un M2-2


Moment un M33


Moment un M33


Th cng

Th ep

Lc ct V2-2

Lc ct V2-2

Lc doc

Lc doc

Moment xon

Moment xon

3. Chon ty l cac tung :

* T ng

* Nhp ty l

4b. Hin th gia tr cac tung

(phai bo chon t en biu )

4a. Bo chon T en biu

1. Chon trng hp tai cn xem ni lc

2. Chon thanh phn ni lc cn xem :

* Lc doc(N)

* Lc ct 2-2(Q)

* Lc ct 3-3

* Moment xon

* Moment un 2-2

* Moment un 3-3(M)

Chon trng hp tai cn xem phan lc

H dan khng gian

H khung phng trong mt phng XZ

Khai bao cac bc t do hoat ng.

Chon nhanh cac bc t do hoat ng tuy tng loai h.

H khung khng gian

H san phng trong mt phng XY

Chon trng hp tai trong cn xem

Hin th gia tr tai trong

Hin th tai tp trung cung tai phn b


3. Khai bao gia tr cua tai trong phn b





1. Chon trng hp tai trong cua tai trong cn gan

2. Khai bao gia tr lc va moment theo phng X; Y; Z.

(moment xac nh theo chiu vn nut chai)

1.Chon loai tit din gan cho thanh

2.Chp nhn

R chut chon

4. Thm thanh phn

2. Kiu t hp

1.Tn t hp

3a. Khai bao thanh phn cua t hp

3b. H s nhn cua cac thanh phn

Khai bao thm cac t hp

Lit k cac t hp a khai bao

Tn trng hp tai

Loai tai trong

H s xet n Trong lng Ban Thn

Thm t.hp mi

Sa s liu t.hp a co

Dm

Ct

Lp ct di

Lp ct trn

Khoang cach t trong tm ct thep n mt b tng : a

trng

Loai cu kin

1. t tn cho loai tit din (ti a 8 ky t gm ch cai + ch s)

Chiu cao

Chiu rng

2. Nhp kch thc tit din

Vt liu

3. Khai bao cac thng s thit k ct thep

2. Nhp khoang cach cac li

Hnh dang tit din c ve minh hoa

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