SUT ETABS

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  

 C30X30    

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 

 B30X50    

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 

Define Wall/Slab/Deck Sections

 SLAB1   Modify/Show Section    15 cm     Shell

ETABS 9.7.4 : Design

By Dr.Mongkol JIRAVACHARADET

139

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    SLAB1       

   Kgf-m   Select > by Area Object Type  Floor   Assign > Shell/Area  Area Object Mesh Options  Auto Mesh      1 m



140

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  3-D View   Auto Area Mesh        Area Sections   

   

 

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  Assign > Shell/Area Loads > Uniform     LIVE = 300 ./.

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 

Get Previous Selection

    

       Assign  > Shell/Area Loads > Uniform     DEAD = 100 ./.


Get Previous Selection


141

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  Select > by Line Object Type  Beam   

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  Assign > Frame/Line Loads > Distributed…

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    3-D View   Display > Show Loads  Frame/Line…

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  Show Frame/Line Loads     DEAD       OK



142

  

  

       

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  Analyze > Check Model…    



143

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  Analyze > Set Analysis Options…   Full    Dynamic Analysis

  Option

> Preferences > Live Load Reduction

3D

 

 No

Live Load

Reduction

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  3-D View  


   F5   By Dr.Mongkol JIRAVACHARADET

144

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    

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 Options  Moment Diagrams on Tension Side 

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  3D View  

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 Moment 3-3  DEAD

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  Plan

View

 Frame/Pier/Spandrel Forces…

  1   View

> Show

Selection Only



145

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 

    Elevation View – 1 



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   Plan View   View > Show All

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 A   

 

  Option > Preferences  ACI318-99


> Concrete Frame Design




146

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  Design > Concrete Frame Design  Select Design Combo        Combo  DCON1  DCON2

 DCON2   Show

  DCON2    1.4  DEAD  1.7  LIVE 

 DCON1   <- Remove  Combo  Define > Load Combinations…  

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 

  Elevation View   View > Show All    Plan View – STORY1

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 

Show Undeformed Shape

  Options > Windows  One

    Design > Concrete Overwrite   

Frame Design > View/Revise

   Sway Special               NonSway ETABS 9.7.4 : Design


147

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  Ctrl + A      Design > Concrete Frame Design > View/Revise Overwrites…   

  Element Type   Sway Special        NonSway

 : 

  Design > Concrete Frame Design  

 Start Design/Check of Structure

    

 (Longitudinal Steel)     (Longitudinal Steel)         

   Kgf-cm   Options > Preferences Tolerances…  Minimum Graphic Font Size  6


> Dimensions /


148

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  Options > Preferences Rebar Areas  2

> Output Decimals

 

     cm2             

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   SLAB1  Membrane            B20X40     Assign > Frame/Line  Frame Section…

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 F5     Start Design/Check of Structure                           



149

                  .     



150

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  Shear

Reinforcing

 Design

> Concrete

Frame Design  Display Design Info…

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   Kgf-cm   Options > Preferences > Output Decimals   Lengths  2

      (Av /s)       Av /s = 0.03   RB9:    Av = 2×0.636 = 1.27 .2    s = 1.27/0.03 = 42.3 . >

d/2 = 45/2 = 22.5

.

  RB9 @ 0.20 . ETABS 9.7.4 : Design


151

 

  File > Save As      RCFloor1T  

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  B2-B3   Edit > Replicate  dx = 2 m

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       Assign > Frame/Line Loads > Distributed…

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 F5   




  Start Design/Check of Structure By Dr.Mongkol JIRAVACHARADET

152

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   Kgf-cm  Options > Preferences > Output Decimal   Rebar Area = 2 

       

    Shear Details 

      ETABS 9.7.4 : Design


153

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 

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  Edit > Extrude Lines to Areas  dx = 2 m

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   E2-E4

          Assign > Shell/Area > Wall/Slab/Deck Sections  SLAB1

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 

      Assign > Shell/Area > Area Object Mesh Options  Auto Mesh     1 m

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 

      Assign > Shell/Area > Area Object Mesh Options  Auto Mesh     1 m



154

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 

      Assign > Shell/Area 2 Uniforms…  DEAD     100 kg/m

Loads >

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 

Shell/Area Loads >

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 F5   

      Assign > 2 Uniforms…  LIVE     300 kg/m

  Start Design/Check of Structure

       ETABS 9.7.4 : Design


155

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    Shear Details 

      

Av /s

2

=

0.017 cm /cm

=

0.065 cm /cm

=

0.017 + 2×0.065

=

0.147 cm /cm

  RB9    Av = 2×0.636

=

1.27

cm

   s = 1.27/0.147

=

8.64

cm

     

A /s t

Av+t /s = Av /s + 2A /s t

2

2

2

  RB9 @ 0.08 m   Al = 3.313 cm2          



156

 3    

     RCFloor1   Save As      RC3Story.EDB   SLAB1    Shell    1 m    B20X40     

  

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 

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  Kgf-m   Edit > Edit Story Data  Insert Story…   3  



  Edit

> Edit Story Data  Edit Story…

STORY2, STORY3

   

 STORY4

  DEAD  LIVE         Display > Show Loads             . 1302 ETABS 9.7.4 : Design


157

 (. ) 

  Define Static Load Cases   EQKX  EQKY    X  Y   QUAKE   IBC 2006

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 EQKX   Modify Lateral Load…

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 X Dir      

      ETABS 9.7.4 : Design

R=5


158

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 EQKY   Modify Lateral Load…  Y Dir     

         . 1302  2.8.3            Ieff     :

Ieff = 0.35 Ig

 :

Ieff = 0.70 Ig, Aeff = 1.00 Ag

   :

Ieff = 0.70 Ig

  :

Ieff = 0.35 Ig

   :

Ieff = 0.25 Ig

 ETABS     Frame Property Modifier     Ieff   

  Select > by Line Object Type…  Beam   

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  Assign > Frame/Line 



   0.35   Moment of Inertia about 3 axis


Frame Property Modifiers…


159

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 

 

 



    Frame Property Modifiers       0.7    2  3    

  Assign > Clear Display of Assigns  F5                   M3   1   A-1  EQKX  Ctrl + S   File > Save As…     RC3StoryFx.EDB   BASE  Plan – View   Assign Restraints (Supports)  Fixed

> Joint/Point >

 F5   Pinned      Assign > Frame/Line > Frame Property Modifiers   1      F5                  



160

   2.5.2  . 1302           1.2D + 1.0L + 1.0E

(2.5-1)

0.9D + 1.0E

(2.5-2)

   (Load Factor)  L  2.5-1   1.0  0.5      5,000          

 

Define Load Combinations…




  Delete Combo 

  Add New Combo…     COMB1   


161



  Add New Combo…     •

COMB2 : 1.2D + 0.5L + EQKX

•

COMB3 : 1.2D + 0.5L – EQKX

•

COMB4 : 1.2D + 0.5L + EQKY

•

COMB5 : 1.2D + 0.5L – EQKY

•

COMB6 : 0.9D + EQKX

•

COMB7 : 0.9D – EQKX

•

COMB8 : 0.9D + EQKY

•

COMB9 : 0.9D – EQKY

  COMB10 : D + L    Service Load 

  : 

  F5 



  Options > Windows > One   Elevation View – A



   Frame/Pier/Spandrel Forces…  COMB4, Axial Force  Show Values on Diagram  OK    Ton-m



162



   COMB4     Moment 3-3  OK     Ton-m   Options > Moment Diagram on Tension Side

 



 Options > Preferences > Concrete Frame Design    Design Code   ACI 318-99  ACI 318-05    Seismic Design Category   A  F      ACI 318-02 

  Seismic Design Category   ASCE7-05   A B C D E  F    . 1302    4                      (  1.5-1)       SDS  SD1   1.6-1  1.6-2       SDS  SD1     Sa     0.2   1.0   ETABS 9.7.4 : Design


163

  1.6-1     SDS   SDS    III IV I  II SDS < 0.167  (  )  (  )  ( )    0.167 ≤ SDS < 0.33    0.33 ≤ SDS < 0.50    0.50 ≤ SDS   1.6-2     SD1   SD1    III IV I  II SD1 < 0.067  (  )  (  )  ( )    0.067 ≤ SD1 < 0.133    0.133 ≤ SD1 < 0.20    0.20 ≤ SD1

              (T)          3.3-1  3.3-2    0.8 Ts   Ts      1.4.5   1.6-1    

T = 0.02H

(3.3-1)



T = 0.03H

(3.3-2)

  H      Ts   



Ts = SD1 /SDS

  SD1 ≤ SDS

Ts = 1.0

  SD1 > SDS

   EQKX   Show Lateral Load…   SDS  SD1  



164

 II  

T = 0.02×9

= 0.18



  SD1 < SDS  

Ts = 0.2253/0.5814 = 0.39



  T < 0.8Ts   1.6-1    ACI 318-02  ACI Category  D         

318-05

 Ctrl + A      Design

 Seismic

Design

> Concrete Frame Design



View/Revise Overwrites… 

  Element Type           



Sway Ordinary

A or B

Sway Intermediate

C

Sway Special

D, E or F

    

      Sway Special

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 

  EQKX  EQKY     R = 8           Sway Special

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  Design

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Concrete

Frame

        COMB1 – COMB9  Design  Select Design Combo…



165

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  Design > Concrete Frame Design

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   Kgf-cm    Elevation View – 1

 Start Design/Check of Structure

        SLAB1   Membrane       9.00 cm2    1%  C30X30      C20X20        O/S   Over Size   

      Design > Concrete Frame Design > Display Design Info



166

 

     

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  Interaction  



167

      (Beam/Column Capacity Ratio)       Sway Special      6/5  

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  B/C

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   C20X20     

Details

   Sway    

Special



  Envelope       



168

             ETABS          

  C20X20       Elevation View – 2

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      

 C20X20       Overwrites   C30X30



169

        Concrete Frame Design Overwrites  Concrete Design Information    OK              

   OK   Concrete Frame Design Overwrites       Concrete Design Information   Cancel   

   ETABS         7      

   C30X30   RC3StoryW.EDB

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 

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    Kgf-cm

      R = 7  EQKX  EQKY      



170

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 

    WALL1    Modify/Show

Section

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     20 cm   Shell   OK   

      Plan

View – STORY4 

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   All Stories

  Delete       WALL1 



171

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   Select > by Wall/Slab/Deck Sections  WALL1

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    Assign > Shell/Area

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 

 Area Object Mesh Option…

 Auto Area Mesh    Extrusion 

        ETABS 9.7.4 : Design


172

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   

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  Assign > Shell/Area > Pier Label  P1  OK

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 

   Analysis > Run Analysis  F5   Y 

  Options > Preferences > Shear Wall Design  ACI 318-99   



173

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    Design > Shear Wall Combo    COMB1  COMB9

Design  Select Design

  Design > Shear Wall Design > Start Design/Check of Structure    

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     

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  Combos…    



  Overwrites…    



174

 

   Select > by Pier ID  P1   Design > Shear Wall Design > Assign Pier Sections for Checking > Uniform Reinforcing Pier Section  

  ETABS 9.7.4 : Design


175

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  Design > Shear Wall Design > Start Design/Check of Structure

            100%    

  (D/C = Demand/Capacity)



176

     

 



 Elevation View – A   Kgf-m

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  Edit > Edit Story Data > Insert Story   



   Kgf-cm   


       RC3Roof

 Add Box/Tube


177

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   Kgf-m   Edit > Edit Reference Line    X  Y



 

    RT150X100   Moment Release = Pinned  



178

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    Edit > Replicate   



  3D   Building View Option 



 



       Edit > Extrude Lines to Areas  


 RT150X100     


179

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   Kgf-cm

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 



 Add New Slab



    ROOF   


  


180

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  Select > by Area Object Type  Ramp  OK



  Assign > Shell/Area > Wall/Slab/Deck Sections  ROOF  OK



 



   Analysis > Run Analysis  F5



  Options

    Assign > Shell/Area Loads  Uniform…

> Preferences > Steel Frame Design

 AISC-

ASD89



181

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 

        Add

New Combo…



   COMB10   



182

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

    Design > Steel Frame Design Combo    COMB10

 Select Design

  Design > Steel Frame Design  Start Design/Check of Structure        



183

SUT ETABS

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