Structural Analysis, Design and Detailing for Buildings

1. Struds
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15/12/2011

2. Award Winning Integrated Structural Analysis, Design and Detailing Software with 20
Years Proven Track Record
6000+ user base all over India…
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3. Graphical user interface
Main Menu Toolbar Menu
Tree Menu
Command Prompt
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4. Modeling Features
 Slabs  Curved Beams
 Rectangular Slab  With three points
 With Start point
 Triangular Slab
Center and end point
 Trapezoidal Slab  With start point,
 General Slab Center , included angle
 With Start point, End
 Flat Slab
point and radius
 Beams
 Straight Beam
 Inclined Beam
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5. Modeling Features
Inclined
Beam
Triangular
Slab
Curved Beam Rectangular
Slab
General
Slab
Straight
beam
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6. Modeling Features
 Columns  Shear Walls
 Rectangular  Straight
 Circular  L- Shape
 T-Shape  C- Shape
 L- Shape
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7. Modeling Features
L Shape L Shape
Shearwall Shearwall
L Shape
Column
C Shape
Shearwall
Rectangular T Shape Circular
Column Column Column
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8. 3 D Wire frame
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9. 3 D Render View
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10. Support Conditions
 Fixed  Hinged
 Roller  User Defined
 Member Releases
 Pinned – Pinned  Pinned – Fixed
 Fixed – Pinned  Fixed - Fixed
 User Defined
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11. Import / Export from 3rd party software
Import Export STAAD Pro File
Import
Export
 STRUDS model could be opened in STAAD to visualize the structure and also to
perform analysis.
 STAAD model along with analysis could be imported in STRUDS for design and
detailing.
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12. Exports / Imports ETABS (*.$ET) File
 STRUDS model could be opened in ETABS to visualize the structure and also to
perform analysis.
 ETABS model along with its analysis file could be imported in STRUDS for design
and detailing.
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13. Exports / Imports AutoCAD (DXF) File
Import
Export
 STRUDS imports the floor centerline plan from Auto CAD, using DXF file
format.
 Files generated in STRUDS can be exported to Auto CAD in DXF file
format.
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14. EQ Load Analysis
User provides basic data in a single window
Struds automatically generates seismic loads as per IS:1893 (2002)
from the basic data
Automatic live load reduction on floors
Eccentricity due to centre of mass and centre of stiffness
considered
Soft storey effect can be considered for column design
Floor diaphragm action can be taken into account
Scaling factor automatically computed
Consideration of vertical seismic loads on cantilever projections
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15. Torsion effect
Y
L
EQx
CM ey
ey
W ex ex
X
EQy
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16. Torsion effect
C.M.
As per Cl. 7.9 Seismic Force acts at EL
center of mass which is same as a e
force (EL) plus a twisting moment C.S..
(EL.e) acting at center of stiffness.
C.M.
e
EL EL . e
C.S..
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17. Floor Diaphragm Action
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18. Soft storey effect
Soft Storeys can be defined.
User should enter the factor,
by which the end actions for
all the members of this soft
storey need to be modified.
Due to this the beams at the
upper and lower level, as
well as the columns in
between these two levels,
will be designed for the
elemental end forces
obtained in the analysis
multiplied by the factor, By default the factor is taken as 2.5
which you have specified.
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19. Vertical seismic load effects in
horizontal cantilevers
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20. Scaling Factor
As per clause number 7.8.2 of IS 1893(Part 1) :2002 If we generate
earthquake loads by response spectrum method, the design base
shear (VB) shall be compared with a base shear (VB) calculated by
using a fundamental period Ta, where Ta is as per clause 7.6
where VB is less than VB, all the response quantities (Member
forces, displacements, story forces, story shears and base
reactions) shall be multiplied by VB / VB
Scaling factor = VB / VB
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21. Seismic Analysis Methods
Static Analysis
In Static analysis the fundamental time period is calculated
using IS 1893(part 1):2002
• Frame Stiffness method
• Column Reaction method
Dynamic Analysis
Response Spectrum method
STRUDS calculates design base shear calculation using the
response spectra
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22. Frame Stiffness Method
1
Unit Load W3 PF3
Q3
W2 h3
Q2 PF2
W1 h2
Q1
h1 PF1
PF1
K1 = 1 / Δ1
Wh2 = W1h12 + W2h22 + W3h32
Similarly, K2 = = 1 / Δ2 , K3 = = 1 / Δ3
Q1 = (W1h12 / Wh2) x VbPF1
K = K1 + K2 + K 3
Similarly base shear is calculated for Q2
Distribution Factor DF1 = K1 / K Q3
VbPF1 = DF1 x Vbx
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23. Frame Stiffness Method Report
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24. Column Reaction Method
Q5 R6
1 R5
Unit Load W3
W2 h3 Q3 R4
R3
W1 h2
Vb1
Q1 R2
h1
R1
R = R1 +R2 + R3
Wh2 2 2
= W1h1 + W2h2 + W3h3 2
Distribution Factor DF1 = R1 /R
2
Vb1 = (W1h1 / Wh2) x Vbx
Q1 = DF1 x Vb1
Similarly base shear is calculated for Vb2
Vb3 Similarly the Q2 ,Q3 ,Q4,Q5 and Q6 is calculated
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25. Column Reaction Method Report
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26. Response Spectrum Method
Lumped mass generation
Frequency calculation
Time period calculation
Calculation of base shear as
per given spectra and time period
for particular mode shape
Super impose of base shear of
all mode shapes using SRSS
method.
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27. Response Spectrum Method Report
Earthquake load parameters
Floor wise lumped loads on column /
shear wall nodes
 Frequency Time Period and % Mass
Participation (Eigen value Analysis)
Mode shape coefficient (Eigen Vector)
Scale factor calculation based on static
and dynamic base shear calculation
Floor wise distribution of base shear
 Distribution of floor base shear to
column and shear wall nodes
Contribution of shear walls and column
in Eq. resistance of building.
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28. Response Spectrum Method Report
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29. Response Spectrum Method Report
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30. Wind Load Parameter As Per
IS 875(part 3):1987
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31. Wind load generation by Framing
Method
W3
W3
X
W2 h3 Y
W2 2
X
W1 h2
Y1
h1
W1 X1 X2
X
W1x = [Y1 / 2 * (( h1 / 2) + ( h2 / 2))] * Pz
K = K1 * K2 * K3
W2x = [((Y1 / 2 ) + (Y2 / 2 )) * ((h1/ 2) + (h2 / 2))] * Pz
Vz = Vb * K
W1y = [X1 / 2 * (( h1 / 2 ) + ( h2 / 2 ))] * Pz
Pz = 0.6 * Vz * Vz W2y = [((X1 / 2 ) + (X2 / 2 )) * (( h1/ 2) + (h2/ 2 ))] *Pz
Similarly Wind Load on all frames and all floors is calculated
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32. Report for Wind load generation by
Framing Method
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33. Wind load generation by Notional
Method
Floor3 Floor1
Floor2 h3
M
Y1 W1X
h2 Y1/ 2
Floor1
W1y
h1
X1 / 2
X1Length
K = K 1 * K2 * K3 Total wind load on floor 1- W1x = (Y1 * ( h1 / 2 ) + Y1 * ( h2 / 2)) * Pz
Vz = Vb * K Total wind load on floor 1- W1y = (X1 * ( h1 / 2 ) + X1 * ( h2 / 2)) * Pz
Similarly Wind load on floor 2 and 3 is calculated in X and Y direction.
Pz = 0.6 * Vz * Vz This load is transferred to all column and shear wall nodes through diaphragm
action.
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34. Report for Wind load generation by
Notional Method
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35. 3D Animation for modes
Without animation With animation
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36. Post Processor
For the desired Load
combinations
 Shear Force Diagram
 Bending Moment Diagram
 Axial Force Diagram
 Nodal deflections
 Support Reactions are
displayed.
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37. Post Processor – Shear Force Diagram
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38. Post Processor – Bending Moment
Diagram
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39. Post Processor – Deflection Diagram
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40. Reports in Post Processor
Reports generated in the Post Processor
 Elemental Results
 Nodal Reactions
 Elemental End Actions
 For the desired load combinations
 Shear Wall Analysis Report
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41. Shear Wall Analysis Report
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42. Design
Design of R.C.C structural components done using clauses of IS
456:2000, IS 13920
• One Way/ Two Way / Cantilever Slabs
• Flats slabs (as per IS coefficient method)
• Rectangular, T, L beams
• Rectangular, Circular, L shape, T shape columns
• Shear wall
• Isolated footings (flat, sloping)
• Combined footings (including strip footings)
• Raft with beam
• Piles (Under reamed / End bearing)
• Steel Trusses placed on concrete columns
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43. Slab Design
Rectangular slab
(Two-way, One-
way, Cantilever,
Flat )
Triangular slab
Trapezoidal slab
(Two-way, One-
way)
General Slab
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44. Slab Design
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45. Slab Auto CAD Output (DXF)
Slab detailing along with plan
Auto generation of section line for longitudinal section of slab
User defined section line for longitudinal section of slab
Slab longitudinal section with one direction reinforcement
Slab longitudinal section with both direction reinforcement
Flat slab detailing
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46. Auto CAD Output (DXF) drawing
settings
Following things can be
done using this dialog
box.
1. Color of any layer in
drawing
2. Font of lettering
3. Line type
4. Layer on / off
5. Can create library of
settings to implement
in all other projects
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47. Slab DXF Output
Slab longitudinal section with one direction reinforcement
Slab longitudinal section with both direction reinforcement
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48. Flat Slab Detailing
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49. Slab Reports
Slab design detail report
Slab schedule report
Slab quantity report
Flat slab detail report
Flat slab schedule report
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50. Slab HTML Reports
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51. Beam Design
Linear
Curved
T-Shape
L-Shape
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52. Beam AutoCAD Output (DXF)
Longitudinal section of beams with cross section
Option for user defined detailing
Cross section at support and mid span
Option for position of lap, lap –length.
Option for position of anchor length
Option for Top , bottom, centre flushing of beam in longitudinal
section
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53. Longitudinal Section of Beam with
cross section
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54. Beam Report
Design detail report
Beam schedule report
Beam capacity report i.e. (Beam capacity at different position)
Beam deflection report (with factor and working load )
Bar bending schedule
Beam quantity
Detail report in PDF format
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55. Beam HTML Reports
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56. Beam PDF Reports
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57. Column Design
Rectangular
Circular
T-Shape
L-Shape
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58. HTML Reports Column Design
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59. Column Design With Detailing
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60. Column AutoCAD Output (DXF)
 Column cross section detailing of all floor in vertical format
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61. Column Reports
Column design detail report
Column load detail report
GroupWise Column report
Floor Wise Column report
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62. Column HTML Report
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63. Shear Wall Design
Straight
L-type
C-type
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64. Shear Wall Auto CAD Output (DXF)
Longitudinal and Cross section detailing of Shear wall
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65. Shear Wall Reports
Shear Wall design detail report
Shear Wall load detail report
Shear Wall report GroupWise.
Shear Wall report Floor Wise
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66. Shear Wall HTML Report
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67. Footing Design
Individual Footing
• Trapezoidal
• Flat
• Pedestal with flat
• Pedestal with Trapezoidal
Combined Footing
Strip Footing
Pile Footing
• Driven Cast in -situ
• Bored Cast in –situ
• Driven Pre Cast
• Bored Pre Cast
• Under – reamed Bored Compaction
• Under – reamed Cast in-situ
Raft Footing (Slab Beam system)
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68. Footing Design
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69. Footing Auto CAD Output (DXF)
Footing Center line with C.G. distances
Footing plan and elevation
Pile detailing
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70. Footing Center line with C.G.
distances
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71. Footing plan and elevation
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72. Pile Detailing
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73. Footing Reports
Footing schedule report
Footing detail design report
Footing load report
Footing quantity report
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74. Footing HTML Reports
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75. Some Real Life Buildings Designed
Using Struds
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76. Some Real Life Buildings Designed
Using Struds
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77. Some Real Life Buildings Designed
Using Struds
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78. Some Real Life Buildings Designed
Using Struds
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79. Thank You
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