trinh tu dung mo hinh trong etabs

Trnh t dng m hnh trong ETABS

CC Bc c bn dng m hnh. D LIU BI TON: Mt cng trnh dn dng gm 15 tng v 1 tng hm. Gi thit tng gch

xy trn tt c cc dm, tng dy 200, chiu cao ca tng l 3,5m, tng hm 3,0m. Hot ti ton phn ptp=200kG/m2, hot ti sn mi ptp,mi=75kG/m2. Chn s b kch thc tit din sn 15cm, kch thc dm c th hin trn hnh. Ct t Tng Base n Tng 2 l b=80cm, h=80cm, Tng 3 n Tng 5 l b=70cm, h=70cm, Tng 6 n Tng 8 l b=60cm, h=60cm, Tng 9 n Tng 11 l b=50cm, h=50cm, Tng 12 n Tng 15 l b=40cm, h=40cm. Ct trc 1-B3 v 5-B3 t Tng Base n Tng 15 l b=30cm, h=30cm. Tng chu lc dy 25cm. Dm i qua ct kch thc b=30cm, h=60cm. Dm cn li kch thc b=25cm, h=40cm.

7500

2000

1500

1000

1000

1500

2000

7500

7500

9000

7500

2400

0

D

C

B5

B

A

B4

B3

B2

B1

3900 1600 2000 7500 7500 2000 1600 3900

7500 7500 7500 7500

30000

1 1' 1'' 2 3 4 4' 4'' 5

MAT BANG CONG TRNH

400

1200

400

2000

3600

5000

B3'

B2'

A. tnh ton ti trng:

Tnh ti cc lp cu to tc dng ln bn sn: gm Gch men, Va lt, Va trt trn... gs=152kG/m2. Trng lng bn thn dm, sn, ct, vch chng trnh t tnh.

Trng Thnh Nhn 1 [email protected]

Trnh t dng m hnh trong ETABS Tnh ti (DEAD) -Ti trng do tng xy trn dm: . . . 1,1 0,2 (3,5 0,6) 1800 1148,4( / )t t t tg n b h kG m= = = Hot ti (LIVE) Hot ti sn: 2. 1,2 200 240( / )tts tpp n p kG m= = = Hot ti sn mi: 2. . . 1,3 75 97,5( / )

tts m i tp m ip n p kG m= = =

Cc ti trng khc truyn vo khung: Ti trng cu thang, h nc mi (nu c)... B. TNH TON DNG DAO ng:

-Dng vt liu b tng B25 - Mc350 c mun n hi = 23,0 6 /E e T m -Thnh phn ng ca ti trng gi tc ng ln cng trnh l lc do xung vn

tc gi v lc qun tnh ca cng trnh gy ra. Gi tr ca lc ny c xc nh trn c s thnh phn tnh ca ti trng gi nhn vi h s c k n nh hng ca xung vn tc gi v lc qun tnh ca cng trnh.

-Gi tr khi lng tp trung cc mc trong s tnh ton (khi lng phn t th j ca cng trnh) bng tng gi tr cc khi lng ca kt cu chu lc, kt cu bao che, trang tr, khi lng ca cc thit b c nh (my ci, mt, thng cha, ng ng...), cc vt liu cha (cht lng, vt liu ri...) v cc khi lng khc.

-Khi k n cc khi lng cht tm thi trn cng trnh trong vic tnh ton ng lc ti trng gi, cn a vo h s chit gim khi lng. Trang 6, TCXD 229:1999 quy nh:

-Cu trc T hp Khi lng Tham gia Dao ng

MASS=1DEAD (TT) + 0.5LIVE (HTTP) -Khi lng , dm, ct, sn, vch -->ETABS t tnh ton. -Khi lng hon thin, khi lng tng gch ngn-bao che, hot ti --> ngi

thit k tnh ton. -Khi lng cht ti tm thi (HTCD) --> tra TCXD 2737:1995.

C. TRNH T DNG M HNH TNH DAO NG Bc 1: Chn n v

R chut n thanh trng thi gc bn phi ca mn hnh Click chn n v tnh ton. Chn Tan-m.



Bc 2: to m hnh kt cu 1. Click vo nt lnh:

Hp thoi New Model Initialization xut hin:

2. Click chn Default.edb

3.Click chn Grid Only 4. Khai bo nhng gi tr sau: Number Line in X Direction (S ng li vung gc trc X): 9 Number Line in Y Direction (S ng li vung gc trc Y): 11 Spacing in X Direction (Khong cch theo phng X): 3.9 Spacing in Y Direction (Khong cch theo phng Y): 7.5 Number of Stories (S tng): 17 Typical Story Height (Chiu cao tng in hnh): 3,5 Bottom Story Height (Chiu cao tng di cng): 1 (c ct) Khai bo 17 tng v nhm to thm mt tng t tng Base n king.




5. Click chn: Custom Grid Spacing (Hiu chnh trc nh v v khong

cch cc ng li theo trc X, Y.) 6. Click chn nt Grid Labels...(Hiu chnh tn trc nh v) 7. Click chn nt Edit Grid...(Hiu chnh khong cch ng li theo trc X, Y.)

Hp thoi Define Grid Data xut hin. 8. Click chn Spacing Ti ct Spacing nhp gi tr nh hnh bn di. Ti ct Grid ID nhp li k hiu trc. Ti ct Bubble Loc chn Bottom k hiu trc nm pha di (Thay i bng

cch Click chut vo ch Top th i thnh Bottom.) Ti ct Bubble Loc chn Right k hiu trc nm pha bn phi (Thay i

bng cch Click chut vo ch Left th i thnh Right.) Ti ct Visibility chn Hide n cc trc mun n i. (Mc ch dng cc

trc ph nhm v cc ct, vch cng. Thay i bng cch Click chut vo ch Show th i thnh ch Hide).

S th t Grid ID Spacing Bubble Loc

X Grid 1 1 3.9 Bottom 2 1 1.6 Bottom 3 1 2 Bottom 4 2 7.5 Bottom 5 3 7.5 Bottom 6 4 2 Bottom 7 4 1.6 Bottom 8 4 3.9 Bottom 9 5 0 Bottom

Y Grid 1 A 7.5 Left 2 B 2 Left

Trnh t dng m hnh trong ETABS 3 B1 1.5 Left 4 B2 0.4 Left 5 B2 0.6 Left 6 B3 0.6 Left 7 B3 0.4 Left 8 B4 1.5 Left 9 B5 2 Left 10 C 7.5 Left 11 D 0 Left

9. Click OK ng hp thoi Define Grid Data. 10. Tip theo Click chn: Custom Story Data (Ngi s dng hiu chnh

d liu tng.) 11. Click chn nt Edit Story Data...(Hiu chnh d liu tng.)


Trnh t dng m hnh trong ETABS Hp thoi Story Data xut hin:

STT TN TING ANH CHC NNG 1 Label Tn cc tng 2 Height Chiu cao mi tng 3 Elevation Cao ca tng 4 Master Story Tng in hnh 5 Similar To Cc tng tng t vi tng in hnh6 Base Cao trnh ti mng

Dng Base khai bo Elevation bng -4 do tm hm cao 3m, cng vi chiu cao c ct 1m.

12. Click 2 ln OK ng hp thoi Story Data v Building Plan Grid System and Data Definition.

Sau khi ng hp thoi Building Plan Grid System and Data Definition trn

mn hnh xut hin hai ca s lm vic, click chut vo mt im bt k ti ca s pha bn phi mn hnh (3-D View) hiu chnh khung nhn.


Trnh t dng m hnh trong ETABS 13. Click vo menu View --> Set 3D View.

Hp thoi Set 3D View xut hin:

Khai bo nhng gi tr sau: Plan: 265 Elevation: 6 Aperture: 0

15. Click chn OK ng hp thoi Set 3D View.



Bc 3: NH NGHA C TRNG VT LIU Nhng thng s v vt liu ca chng trnh c ly theo tiu chun AISC. Do

vy ngi s dng cn phi hiu chnh li nhng thng s cho ph hp vi TCVN. khai thc ht nhng tnh nng ca phn mm c bit l tnh nng thit k ct thp (Concrete Frame Design) cho cu kin b tng ct thp (Nhng tiu chun thit k c tch hp trong phn mm khng c tiu chun Vit Nam), nhng thng s iu chnh dng tiu chun CSA-A23.3-94 c trong phn mm thit k ct thp.

1. Click vo menu Define --> Materials... hoc Click vo biu tng trn

thanh cng c. Hp thoi Define Materials xut hin:

STT TN TING ANH CHC NNG 1 Materials Vt liu s dng cho kt cu 2 CONC (Concerte) Vt liu b tng 3 STEEL Vt liu thp 4 OTHER Vt liu khc 5 Add New Material... Thm loi vt liu mi 6 Modify/Show Material... Hiu chnh thng s t vt liu c

2. Click chn CONC 3. Click chn Modify/Show Material

Hp thoi Material Property Data xut hin: STT TN TING ANH CHC NNG

1 Material Name Tn loi vt liu 2 Isotropic Vt liu ng hng 3 Orthotropic Vt liu trc hng 4 Analysic Property Data Nhng c trng ca vt liu

5 Mas per unit Volume Khi lng ring xc nh khi lng ca phn t (dng tnh ton cho bi ton ng)

6 Weight per unit Volume Trng lng ring (dng tnh ton trng lng bn thn ca phn t)

7 Modulus of Elasticity H s Modul n hi dng xc nh cng dc trc v cng un (thng s ny s c thay i ph thuc vo cp bn ca b tng)

8 Poissons Ration H s Poisson (vt liu b tng ly =0.2, vt liu thp =0.3)

9 Coeff of Thermal Expansion H s dn n do nhit

10 Shear Modulus H s mdun n hi trt dng xc nh cng chng ct v cng xon

11 Design Property Data Cc thng s dng cho thit k

12 Specified Conc Comp Strength, fc Cng chu nn ca b tng

13 Bending Reinf. Yield Stress, fy ng sut chy ca thp 14 Shear Reinf. Yield Stress, fys ng sut ct ca thp


Trnh t dng m hnh trong ETABS 4. Khai bo nhng gi tr sau: Thng s dng tnh ton ni lc: Mass per unit Volume: 0.25 Weight unit Volume: 2.5 Modulus of Elasticity: 3.0e6 Poissons Ration: 0.2 Coeff of Thermal Expansion: 0

5. Click chn OK ng hp thoi Material Property Data.

Ch : Nu nh ngi s dng ch cn tnh kt qu ni lc cho kt cu th ch cn khai bo cc thng s bn tri ca hp thoi Thng s dng tnh ton ni lc. Khng cn khai bo cc thng s pha bn phi hp thoi Thng s dng thit k ct thp. Phi khai bo c hai ct trong hp thoi khi cn tnh ton thit k ct thp cho kt cu.Nhng thng s iu chnh dng tiu chun CSA-A23.3-94 c trong phn mm thit k ct thp. Nhng thng s hiu chnh c lp thnh bng tra.

Bng gi tr fc tng ng vi cp bn chu nn theo TCVN 356-2005 Cp bn B15 B20 B25 B30 B35

Rb (Mpa) 8.5 11.5 14.5 17.0 19.5 fc (Mpa) 17.1886 23.5262 30.0225 35.5666 41.2368

Cp bn B40 B45 B50 B55 B60

Rb (Mpa) 22.0 25.0 27.5 30 33 fc (Mpa) 47.0434 54.2051 60.3492 66.6673 74.5018

Bng gi tr fy tng ng vi cp bn chu nn theo TCVN 356-2005

Loi thp CI, AI CII, AII AIII

(d=6 8)CIII, AIII (d=1040) VIV, AIV AV AVI

Rs (Mpa) 225 280 355 365 510 680 815 fy (Mpa) 264.7 329.4 417.6 429.4 600 800 958.8


Trnh t dng m hnh trong ETABS 6. Click vo menu Options --> Preferences... --> Concrete Frame Design...

Hp thoi Concrete Frame Design Preferences xut hin:

7. Ti dng Design Code. Click chn ct bn phi, r chut ti tiu chun

CSA-A23.3-94.

8. Click OK ng hp thoi Concrete Frame Design Preferences. Bc 4: NH NGHA C TRNG HNH HC NH NGHA C TRNG HNH HC CT 1. Click vo menu Define --> Frame Section... hoc Click biu tng .

Hp thoi Frame Properties xut hin:


Trnh t dng m hnh trong ETABS 2. Ti dng Add/Wide Flange Click chn Add Rectangular.

Hp thoi Rectangular Section xut hin:

STT TN TING ANH CHC NNG 1 Section Name Tn tit din (t tn ty ) 2 Section Properties Nhng c trng ca tit din 3 Set Modifiers H s nhn gi tr c trng hnh hc 4 Material Loi vt liu 5 Depth (t3) Chiu cao tit din 6 Width (t2) B rng tit din

7 Concrete Reinforcement Nhng thng s dng thit k cho vt liu b tng ct thp


Trnh t dng m hnh trong ETABS 3. Click vo Reinforcement... xut hin hp thoi Reinforcement Data

STT TN TING ANH CHC NNG 1 Design Type Loi cu kin 2 Column Loi ct 3 Beam Loi dm 4 Configuration of Reinforcement Loi tit din 5 Rectangular Loi tit din hnh ch nht 6 Circular Loi tit din hnh trn 7 Ties Dng thanh 8 Rectangular Reinforcement Ct thp cho tit din ch nht

9 Cover to Rebar Center Chiu dy lp b tng bo v tnh t mt ngoi n tm ct thp

10 Number of Bars in 3-dir/2-dir S thanh thp t theo hng trc 3/2 ca mt ct

11 Bar Size ng knh thanh thp (dng cho bi ton kim tra)

12 Check/Design Kim tra/Thit k 13 Reinforcement to be Checked Dng cho bi ton kim tra 14 Reinforcement to be Design Dng cho bi ton thit k 4. Click chn 2 ln OK ng hp thoi Reinforcement Data v Rectangular

Section. Thc hin tng t cho cc c trng C70x70, C60x60, C50x50, C40x40, C30x30.

5. Click chn OK ng hp thoi Define Frame Properties.



NH NGHA C TRNG HNH HC DM 1. Thao tc thc hin tng t nh tit din ct.

STT TN TING ANH CHC NNG

1 Section Name Tn tit din (t tn ty . d qun l nn t tn tit din dm c ch ci Dbxh, Cbxh)

2 Section Properties... Nhng c trng ca tit din 3 Set Modifiers... H s nhn gi tr c trng hnh hc 4 Material Loi vt liu 5 Depth (t3) Chiu cao tit din 6 Width (t2) B rng tit din

7 Concrete Reinforcement Nhng thng s dng thit k thp cho vt liu btng ct thp 2. Nhp gi tr ti dng Depth (t3), Width (t2).



3. Click Reinforcement... Hp thoi Reinforcement Data xut hin:

STT TN TING ANH CHC NNG

1 Concrete Cover to Rebar Center

Chiu dy lp b tng bo v tnh t mt ngoi n tm lp ct thp

2 Top Chiu dy lp b tng bo v mt trn ca tit din

3 Bottom Chiu dy lp b tng bo v mt di ca tit din

4 Reinforcement Overrides for Ductile Beams on ct thp ni chng ln nhau

5 Left/Right V tr on ni chng bn tri/phi ca cu kin

6 Top/Bottom V tr on ni chng mt trn/di ca cu kin 3. Click chn 2 ln OK ng hp thoi Reinforcement Data v Rectangular

Section. Thc hin tng t cho c trng D30x60. 4. Click chn OK ng hp thoi Define Frame Properties. NH NGHA C TRNG HNH HC SN 1. Click vo menu Define --> Wall/Slab/Deck Section ... hoc Click biu tng trn thanh cng c.


Trnh t dng m hnh trong ETABS Hp thoi Define Wall/Slab/Deck Sections xut hin:

2. Click chn SLAB1 3. Click chn Modify/Show Section...

4. Khai bo tn v nhng gi tr

sau: Section Name: SAN150

Material: B25

Membrane: 0.15

Bending: 0.15

5. Click OK

6. Tip tc Click chn WALL1 7. Click chn Modify/Show Section... 8. Khai bo tn v nhng gi tr sau: Section Name: T250

Material: B25

Membrane: 0.25

Bending: 0.25


Trnh t dng m hnh trong ETABS 9. Click 2 ln OK ng hp thoi Wall/Slab Section v Define

Wall/Slab/Deck Sections.

Bc 5: V M HNH 1. R chut n thanh trng thi gc bn phi mn hnh Click chn ch cn

dng: One Story (Ch thao tc trn tng hin ti), All Stories (Thao tc trn tt c cc tng nh tng hin ti), Similar Stories (Thao tc trn cc tng c khai bo ging nh tng hin ti).

2. Click chn khung nhn pha bn tri mn hnh (mt bng).

3. Click Set Plan View...Hoc vo menu View --> Set Plan View...

Hoc

4. Chn tng cn hin th. 5. Di chuyn ln xung cc tng. Click chn mi tn hng ln hoc hng xung.


Trnh t dng m hnh trong ETABS Move Up in List: Di chuyn ln tng trn. Move Down in List: Di chuyn xung tng di. V PHN T DM 1. Cch 1: Click vo menu Draw --> Draw Line Objects --> Draw Lines (Plan,

Elve, 3D) hoc Click biu tng trn thanh cng c bn tri mn hnh.

Cch 2: Click vo menu Draw --> Draw Line Objects --> Create Lines in Region

or at Clicks (Plan, Elev, 3D) hoc Click biu tng trn thanh cng c bn tri mn hnh.

2. Hin hp thoi Properties of Object:

Ti dng Property Click vo dng bn phi chn tit din dm cn dng

c khai bo tn trc . (V tit din c ch ci u tin l D, ta bm ch D vo dng ny dng ch mu xanh t ng dn ti.)

3. Click nt Close tt hp thoi. Thao tc v dm. Nu chn cch v 1: Click vo im th nht trn mt bng li n im cui v phn t dm. Nu chn cch v 2: R chut n v tr ng li m phn t thanh s nm trn Click chn.

Right click chut kt thc i tng ang v nu v theo cch 1.

4. Tip tc tng t ta v cho cc dm cn li. 5. Nhn phm Esc trn bn phm thot lnh v chuyn sang

ch chn hoc Click vo biu tng trn thanh cng c bn tri mn hnh. Note: Nn v dm theo chiu dng ca trc ta Tng th. Khi v dm ta c th to dm o. Tnh nng to dm o (None): tnh nng ny gip ta c th gn ti trng nm trn sn thng qua dm o (n c nh tng xy trn sn). Dm o truyn ti ln sn. Sn truyn ti ln dm khung.



V PHN T CT 1. Click vo menu Draw --> Draw Line Object s --> Create Columns in

Region or at Clicks (Plan, Elve, 3D). Hoc Click vo biu tng trn thanh cng c bn tri mn hnh.


Ti dng Property Click vo dng bn phi chn tit din ct cn dng

c khai bo tn trc . (V tit din c ch ci u tin l C, ta bm ch C vo dng ny dng ch mu xanh t ng dn ti.)

3. Thao tc: R chut n v tr nt cn v phn t ct sau Click vo nt .

4. Tip tc tng t ta v cho cc ct cn li. 4. Nhn phm Esc trn bn phm thot lnh v chuyn sang ch

chn hoc Click vo biu tng trn thanh cng c bn tri mn hnh. V PHN T TM (AREA)

1. Cch 1: Click vo menu Draw --> Draw Area Objects --> Draw

Areas (Plan, Elve, 3D) hoc Click vo biu tng trn thanh cng c bn tri mn hnh. (V phn t tm hnh t gic cnh bt k.)

Cch 2: Click vo menu Draw --> Draw Area Objects --> Draw Rectangular

Areas (Plan, Elve) hoc Click vo biu tng trn thanh cng c bn tri mn hnh. (V phn t tm hnh ch nht.)

Cch 3: Click vo menu Draw --> Draw Area Objects --> Create Areas at Click (Plan, Elve, 3D) hoc Click vo biu tng trn thanh cng c bn tri mn hnh.




Ti dng Property Click vo dng bn phi chn tit din sn (SAN150) cn

dng c khai bo tn trc .

3. Thao tc: Cch 1: Click ln lt 4 im gc ca phn t tm. Cch 2: Click im gii hn th 1. Gi chut tri r chut ti im gii hn th

2 cn v ca phn t tm (sn).

4. Nhn phm Esc trn bn phm thot lnh v chuyn sang ch chn

hoc Click vo biu tng trn thanh cng c bn tri mn hnh. V PHN T Tng cng (VCH)

1. Cch 1: Click vo menu Draw --> Draw Area Objects --> Draw Walls (Plan) hoc Click vo biu tng trn thanh cng c bn tri mn hnh.

Cch 2: Click vo menu Draw --> Draw Area Objects --> Create Areas at

Click (Plan) hoc Click vo biu tng trn thanh cng c bn tri mn hnh.




Ti dng Type of Area ta chn Pier (vch chu lc) hoc Spandrel (vch

ging ngang - vch trn u ca) cho hp l. Ti dng Property Click vo dng bn phi chn tit din vch (T250) cn dng c khai bo tn trc .

3. Thao tc: Cch 1: Click ln lt im u v im cui ca phn t vch cn v. Cch 2: R chut n v tr ng li mun v phn t tng sau Click

chn ng li. 4. Right click chut kt thc i tng ang v nu v theo cch 1. Tip tc

chuyn sang v phn t vch khc. 5. Nhn phm Esc trn bn phm thot lnh v chuyn sang ch chn

hoc Click vo biu tng trn thanh cng c bn tri mn hnh. Bc 6: CHIA NH PHN T

CHIA NH PHN T THANH (Divide Lines) Thao tc thc hin: 1. Chn cc phn t cn chia.

2. Click vo menu Edit --> Divide Lines... Hp thoi Divide Selected Lines xut hin:

Ch thch: Divide into: S on cn chia. Break at Intersections with Selected Lines

and Points: Phn t s c chia ti v tr giao nhau gia cc thanh v cc phn t nt c chn.

Break at Intersections with Visible Grid Lines: Phn t s c chia ti v tr giao nhau vi cc ng li hin th.

3. Click OK ng hp thoi Divide Selected Lines.



CHIA THT PHN T Tm (Mesh Areas) Thao tc thc hin: 1. Chn cc phn t cn chia.

2. Click vo menu Edit --> Mesh Areas... Hp thoi Mesh Selected Areas xut hin:

STT Tn ting Anh Chc nng

1 Cookie Cut at Selected Line Objects (Horiz.)

Mesh ti nhng v tr ct vi nhng i tng Line (trn mt phng ngang).

2 Cookie Cut at Selected Points at --- Degrees (Horiz.)

Mesh ti nhng v tr im chn ti --- (trn mt phng ngang).

3 Mesh Quads/Triangles into ---by--- Areas

Mesh t gic, tam gic phng X thnh cc on. Mesh t gic, tam gic phng Y thnh cc on.

4 Mesh Quads/Triangles at Mesh t gic, tam gic ti v tr. 5 Intersections with Visible Grids Giao nhau vi ng li hin th. 6 Selected Point Objects on Edges i tng im bin c chn.

7 Intersections with Selected Line Objects Giao nhau vi cc phn t thanh chn.

Trong trng hp phn t c chia khng theo mun th Click vo biu

tng ( Undo ) trn thanh cng c hy b thao tc va thc hin. Sau thc hin li.

Trng hp Mesh ny l Mesh tht (Vch cng nn Mesh tht). Trong Etabs cn cung cp ch Mesh o. y l tnh nng mi ca cc phin bn Etabs. i tng s dng l cc phn t tm: sn, vch...Vi ch Mesh o ny kt qu cho ging nh Mesh tht nn tc x l kt qu bi ton nhanh hn.

3. Click OK ng hp thoi Divide Selected Lines Ch dng vch ca thang my...



CHIA O PHN T Tm (Mesh Areas) 1. Chn phn t cn chia. 2. Click menu Assign --> Shell/Area --> Area Object Mesh Options.

Hp thoi Area Object Auto Mesh Options xut hin:


Trnh t dng m hnh trong ETABS Floor Meshing Options Chn la ch chia sn

Defaut (Auto Mesh at Beams and Walls if Membrane - No Auto Mesh if Shell or Plate)

T ng chia ti vi tr giao nhau gia dm v tng nu i tng c chn l Mng - khng t ng chia nu i tng c chn l phn t v mng - tm.

For Defining Rigid Diaphragm and Mass Only (No Stiffness - No Vertical Load Transfer)

T chia cho nhng i tng c khai bo l tm cng (khng cng - khng truyn ti theo phng ngang)

No Auto Meshing (Use Object as Structural Element)

Khng dng ch t chia (S dng nhng i tng nh l phn t kt cu)

Auto Mesh Object into Structural Elements

T ng chia cc i tng di dng cc phn t kt cu (y l ch ta hay dng n nht cho vic gii quyt bi ton t chia phn t)

Mesh at Beam and Other Meshing Line T chia ti v tr dm v cc ng giao nhau.

Mesh at Wall and Ramp Edges T chia ti v tr tng cng (vch) giao vi phn t cu thang.

Mesh at Visible Grid T chia ti v tr giao nhau gia cc ng li. Futher Subdivide Auto Mesh With Maximum Element Size of: La chn khong

cch t ng chia nh vi gi tr ln nht l: nhp khong cch cn chia. (Chng trnh s t ng thc hin chia li vi khong cch ti a l gi tr nhp vo, gi tr cng nh s cho kt qu t chnh xc cao hn, ty theo nhp ca cc sn m ta nhp gi tr ph hp.)

Ramp and Wall Meshing Options: Chn la ch t chia vi yu t c dc cu thang v tng cng.

No Subdivison of Object Khng chia nh i tng.

Subdivide Object into --- vertical and --- horizontal

Chia nh i tng thnh cc phn vi khong cch ln nht l... (Ta nhp gi tr mun chia cho ph hp vo. y l ch ta hay dng n nht cho vic gii quyt bi ton t chia phn t i vi kt cu tng cng, vch.)

Add restraints/constrains on edge if Corners have restraints/constrains

S dng c gi/nt vng bin nu gc c gi/nt (Thng c chn vi cc bi ton tnh ton BTCT trong Etabs.)

3. Click chn Auto Mesh Object into Structural Elements

4. Click nh du chn v nhp gi tr nh trn. 5. Click OK ng hp thoi Area Object Auto Mesh Options. Xem cch chia sn o nh th no ta Click vo menu View --> Set Building

View Options... biu tng trn thanh cng c.



Hp thoi Set Building View Options xut hin:

Click chn Auto Area Mesh. Click chn OK. Ta s thy cch chia sn o trn mt

bng sn thao tc Mesh o trc . Tt ch hin th Mesh o, ta v li Set Building View Options, b chn Auto

Area Mesh. Bc 7: NH LI TN PHN T (Relabel) Chc nng ny gip ta d kim sot c kt qu v trong qu trnh xy dng

m hnh, ta thm hoc bt mt s phn t nn tn phn t thay i.

1. Thao tc: Click vo menu Edit --> Auto Relabel All. Hp thoi xut hin:

2. Click OK. Bc 8: GN SN cng (Diaphragm) Chng trnh cho php ngi s dng gn ch sn tuyt i cng

(Diaphragm). Khi ch ny c gn chng trnh s t ng xc nh tm cng ca sn. Chc nng ny gip tnh ton gi ng v ng t mt cch thun tin. (Sn khng b bin dng khi nhn cc ti trng ngang tc dng, m s truyn ton b ti trng ngang cho cc phn t dm, ct, vch.)

1. ch One Story. Di chuyn ti tng cn khai bo (tin hnh lm t sn tng di cng ln). Hin th tt c phn t dm, sn, ct, vch.. trong Set Building View Options.


Trnh t dng m hnh trong ETABS 2. Chn tt c cc phn t. Click vo menu Assign --> Shell/Area -->

Diaphragms...

Hp thoi Assign Diaphragm xut hin:

3. Click vo Add New Diaphragm t tn cho mng cng.

Hp thoi Diaphragm Data xut hin:


Trnh t dng m hnh trong ETABS STT Tn ting anh Chc nng

1 Diaphragm Tn mng cng 2 Rigidity Chn la tnh cht v cng 3 Rigid Cng 4 Semi Rigid Na cng

4. t tn cho mng cng xong ta Click OK tt hp thoi Diaphragm Data. 5. Chon tn mng cng cn t cho sn tng. Click OK tt hp thoi Assign

Diaphragm. (Tn mng cng nn trng vi tn sn tng d qun l.) Bc 9: GN TI TRNG TC DNG LN CNG TRNH

nh ngha cc TRng hp ti 1. Click vo menu Define --> Static Load Cases...

Hp thoi Define Static Load Case Names xut hin:

Load: Tn trng hp ti. DEAD: Tnh ti

Type: Loi ti trng. SUPER DEAD: Tnh ti c bit

Self Weight Multiplier: H s nhn. LIVE: Hot ti Auto Lateral Load: T ng tnh ti trng theo cc tiu chun khc nhau.

REDUCE LIVE QUAKE: ng t

Add New Load: Thm ti mi. WIND: Ti gi Modify Load: Hiu chnh ti trng. SNOW: Ti tuyt Modify Lateral Load: Hiu chnh trng hp ti tnh t ng. OTHER: Ti khc

2. Click OK ng hp thoi Define Load. T HP TI TRNG

T hp cc trng hp ti trng tm ra gi tr ni lc ti v tr nguy him nht cho cu kin.

1. Click vo menu Define --> Combinations...


Trnh t dng m hnh trong ETABS Hp thoi Define Load Combinations xut hin:

Add New Combo...: Thm t hp mi. Modify/Show Combo...: Hiu chnh t hp c chn. Delete Combo: Xa t hp c chn. 2. Click vo Add New Combo...

Hp thoi Load Combination xut hin:

Load Combination Name Tn t hp ti trng. Load Combination Type Kiu t hp.

ADD (Linear Add) Cng tc dng. (Kt qu ni lc ca cc trng hp ti c cng li vi nhau)

ENVE (Envelope) Biu bao. (Ly kt qu ni lc ca cc trng hp a ra gi tr Max v Min)

ABS (Absolute Add) Ly gi tr tuyt i.

SRSS T hp theo cn bc hai tng bnh phng cc trng hp ti.

Case Name Tn trng hp ti. Scale Factor H s t hp ti.



GN TI LN PHN T THANH Chn phn t thanh cn gn ti trng. 1. Gn ti tp trung ln phn t thanh: Click vo menu Assign --> Frame/Line

Loads --> Point...

Hp thoi Frame Point Loads xut hin:

Options: Chn cc ch gn ti. Direction: Hng lc tc dng. Relative Distance from End-I: Khong cch tng i. Absolute Distance from End-I: Khong cch tuyt i. Point Load: Ti tp trung. Distance: Khong cch. Gravity: Trng lc.

2. Gn ti phn b u hoc hnh thang ln phn t thanh: Click vo menu

Assign --> Frame/Line Loads --> Distributed... hoc Click vo biu tng trn thanh cng c.



Hp thoi Frame Distributed Loads xut hin:

Trapezoidal Loads: Ti phn b hnh thang. Uniform Load: Ti phn b u.

2. Nhp gi tr ti trng cn gn. 3. Click OK ng hp thoi Frame Distributed Loads. Note: Nhn gi phm Shift v Click double vo cha gi tr Load. Hp thoi

Calculator xut hin:

Ti dng Formula nhp gi tr cn tnh ton. Click Buttom Calculate tnh

ton. Click OK ng hp thoi Calculator.



GN TI LN phn t tm Chn phn t tm cn gn ti trng. 1. Gn ti tp trung ln phn t thanh: Click vo menu Assign --> Shell/Area

Loads --> Uniform...Hoc Click vo biu tng trn thanh cng c.

Hp thoi Uniform Surface Loads xut hin:

2. Nhp gi tr ti trng cn gn. 3. Click OK ng hp thoi Uniform Surface Loads. Bc 10: KIM TRA CC GI TR TI TRNG GN Trong qu trnh gn ti cho cc phn t, ta c th gn sai xt. V th chng

trnh cho php kim tra li cc gi tr ti trng va gn. Thao tc thc hin: 1. i vi phn t nt (Joint/Point): Click vo menu Display --> Show Loads --> Joint/Point...


Trnh t dng m hnh trong ETABS Hp thoi Show Joint/Point Loads xut hin:

2. i vi phn t thanh (Frame): Click vo menu Display --> Show Loads --> Frame/Line...

Hp thoi Show Frame/Line Loads xut hin:

Load Case: Tn trng hp ti trng cn kim tra. Load Type: Loi ti trng mun xem. Include Point Loads: Gm cc ti tp trung. Show Loading Values: Hin th cc gi tr ti tc dng.

3. i vi phn t tm v (Shell): Click vo menu Display --> Show Loads --> Shell/Area...



Hp thoi Show Shell/Area Loads xut hin:

Bc 11: KHAI BO ct lch tm (insertion point)

Chn ct cn khai bo lch tm ( ch All Story). Vo Assign --> Frame/Line --> Insertion Point...


Trnh t dng m hnh trong ETABS Hp thoi Frame Insertion Point xut hin:

- Ti Cardinal Point chn cc im s cn khai bo. Mc nh ban u l im

s 10 (Centriod). - B chn du tick trong Do not transform frame stiffness for offsets from

centroid. - Click 1 ln OK ng hp thoi Frame Insertion Point.

10(Centroid) 10 10

10

1010

1010

10

3(Bottom Right) 6(Middle Right) 9(Top Right)

1(Bottom Left) 4(Middle Left) 7(Top Left)

2(Bottom Center) 8(Top Center)

10(Centroid)

Mc nh ban u SAU KHI KHAI Bo Ct lch tm

Ch : Cch nh 1-2-3; 4-5(10)-6; 7-8-9; th t t di ln. hin th ct c khai bo lch tm vo Set building View Options, chn Extrution --> OK, s thy cch thc ct c khai bo trn mt bng Plan. Bc 12: KHAI BO TI TRNG THAM GIA DAO ng (mass soure)

1.Click vo menu Define --> Mass Soure

Hp thoi Define Mass Source xut hin:



2. Click chn From Loads. Ti list Load ta chn DEAD, list Multiplier ta

nhp h s 1 --> Click buttom Add. 3. Tip tc ti list Load ta chn LIVE, list Multiplier ta nhp h s 0.5 -->Click

buttom Add. 4. Click OK ng hp thoi Define Mass Source. Bc 13: Khai bo iu kin bin 1. Chn nhng phn t nt cn gn iu kin bin. 2. Click vo menu Assign --> Joint/Point --> Restraints (Supports)...

Hp thoi Assign Restraints xut hin:



3. Ti dng Fast Restraints Click chn lin kt cn gn. 4. Click OK ng hp thoi Assign Restraints. Bc 14: KIM TRA M HNH (Check Model)

1. Click vo menu Analyze --> Check Model

Hp thoi Check Model xut hin:


Trnh t dng m hnh trong ETABS 2. Click nh chn tt c trong hp thoi ny. Click OK chng trnh bt

u kim tra. 3. Nu m hnh khng c li g th chng trnh s bo hp thoi:

Bc 15: Chn m hnh tnh ton v khai bo bc t do 1. Click vo menu Analyze --> Set Analysis Options...

Hp thoi Analysis Options xut hin:

2. Click chn Full 3D. 3. Click chn Set Dynamic Parameters...

Hp thoi Dynamic Analysis Parameters xut hin:

4. Ti dng Number of Modes nhp gi tr s mode dao ng ca m hnh.


Trnh t dng m hnh trong ETABS 5. Click 2 ln OK ng hp thoi Dynamic Analysis Parameters v

Analysis Options. Bc 16: chy m hnh (run - f5)

Click vo menu Analyze --> Run Analysis hoc Click chn biu tng hoc bm phm F5 trn bn phm.

Hoc

Cc dng dao ng ring c bn ca cng trnh

Xem h trc ta a phng (Local Axes) Click vo menu View--> Set Building View Options...Hin hp thoi: ti ct

Objects View Options chn Line Local Axes. Click OK ng hp thoi Set Building View Options. Khi tng phn t s xut hin h trc ta a phng Local Axes ca

xut hin. phn t Line (dm, ct) s -Local Axes ca phn t c mc nh nh sau: -Trc 1: Tng ng vi trc mu . -Trc 2: Tng ng vi trc mu trng. -Trc 3: Tng ng vi trc mu xanh Dm l cu kin chu un, tnh thp trong dm tng ng vi kt qu xut ra t Etabs cn gi tr momen quay quanh trc 3 (Moment 3-3 trc mu xanh). Lc ct tnh ct ai trong dm theo phng trc 2 (Shear 2-2 trc mu trng).



Xem kt qu t bng 1. Click vo menu Display --> Show Tables... 2. La chn ni lc, phn lc, chuyn v...ca cc phn t cn xut ra bng.

Hp thoi Choose Tables for Display xut hin:

STT Tn ting anh Chc nng 1 MODEL DEFINITION Cc nh ngha mu

2 ANALYSIS RESULTS Cc kt qu cn xut ra bng. Ta la chn cc phn t cn xut kt qu ra bng 3 Displacement Chuyn v 4 Reations Phn lc 5 Modal Information Thng tin v dao ng 6 Building Output D liu xut ra ca cng trnh 7 Frame Output Xut cc d liu ca phn t thanh 8 Wall Output Xut cc d liu ca phn t tng (vch)

STT Tn ting anh Chc nng

1 Story Tng 2 Beam Tn dm 3 Column Ct 4 Load Loi ti trng/t hp 5 Loc (Location) V tr 6 V2 Lc ct thep phng trc 2 (Local Axes 2) 7 V3 Lc ct thep phng trc 3 (Local Axes 3) 8 T Momen xon 9 M2 Momen quay quanh trc 2 (Local Axes 2) 10 M3 Momen quay quanh trc 3 (Local Axes 3) 11 Points Displacements Chuyn v ti im 12 Suppor Reations Phn lc ti nt 13 UX, UY, UZ Chuyn v theo 3 phng X, Y, Z 14 RX, RY, RZ Ba thnh phn xoay quanh trc X, Y, Z 15 Pier Dng thanh (s dng khi chng ta gn vch)


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