STRUDS Flow Diagram

1
(No Transcript)
2
(No Transcript)
3
STRUDS Flow Diagram
4
STRUDS Modeling

• Extremely User friendly interface
• Easy floor wise model creation
• Import from and export to AutoCAD drawings
• Easy edition of modeled geometry

5
STRUDS Modeling

• Creation and Edition of Model properties
• Display and Enquiry of Model attributes
• Facility to Renumber elements, for easy
  identification

6
Support Conditions

• Support Conditions depending upon the structure
  type can be defined.

7
Member Releases

• Member releases, for selected elements can be
  applied, to take into effect discontinuity in an
  element

8
Master - Slave

• The Master Slave concept enables the creation of
  rigid links, using either the Equal Degree of
  Freedom or the Equal Displacement type of
  relationship

9
Seismic Design as per IS1893-2002 UBC 1997

• Section 7
• Cl. 7.1 Regular and Irregular Configurations
• Cl. 7.2 Importance Factor I and Response
  Reduction Factor R
• Cl. 7.3 Design Imposed Loads for Earthquake
  Force Calculation
• Cl. 7.4 Seismic Weight (DLImposed Loads )
• Cl. 7.5 Design Lateral Force (Base shear
  Computation)
• Cl. 7.6 Fundamental Natural Period
• Cl. 7.7 Distribution of Design Force (Rigid
  Diaphragm Action)
• Cl. 7.8 Dynamic Analysis (Response Spectrum)
• Cl. 7.9 Torsion (eccentricity of CM CR)
• Cl. 7.10 Buildings with Soft Storey
• Cl. 7.11 Deformations
• Cl. 7.12 Miscellaneous (Cantilever Projections)

10
IS1893-2002 For Seismic Design

• TORSION EFFECT (Clause 7.9) Eccentricity
  Computation
• Need to locate
• Centre of Mass (CM) , and
• Centre of Rigidity (CR)
• Centre of Mass is easy to locate
• Unless there is a significant variation in mass
  distribution, we take it at geometric centre of
  the floor.
• Locating CR is not so simple for a multi-storey
  building.

11
Locating CR (Superposition Method)

• Apply lateral load profile at CM and analyze the
  building
• say the solution is F1
• This incorporates the effect of computed
  eccentricity (without dynamic amplification or
  accidental etc.)
• Apply lateral load profile at CM but restrain the
  floors from rotating
• say this solution is F2
• This amounts to solving the problem as if the
  lateral loads were applied at the CRs since the
  floors did not rotate.
• The difference of F1 and F2 gives the solution
  due to torsion caused by computed eccentricity.

12
Locating CR ... Contd.

• Hence, solution for loads applied at 1.5 times
  computed eccentricity (Clause 7.9.2)
• solution F1 0.5(solution F1 solution F2)
• To this, add solution due to accidental torsion
• Apply on every floor a moment profile equal to
  load profile times accidental eccentricity
• say solution F3

13
Locating CR ... Contd.

• Final solution should be worst of
• F1 0.5 (F1 F2) ? F3
• F1 ? F3

14
Seismic Load Computation Based on IS1893-2002

• Soft Storey can be defined
• Facility to consider Vertical Seismic loads, for
  all the elements marked as Horizontal Cantilevers

15
Vertical Seismic Loads

• STRUDS provides the user the extended capability
  to specifically mark horizontal elements at the
  set floor level, as Cantilever Elements
• This provision has been essentially made for
  consideration of vertical seismic loads for
  design of these horizontal Cantilevers

16
Seismic Load Computation Based on IS1893-2002

• Consideration Of Rigid Floor Diaphragm Action.
• Consideration of Torsion effect due to
  eccentricity between the Center of Stiffness and
  Center of Mass

17
Post Processor

• For the desired Load combinations
• Shear Force Diagram
• Bending Moment Diagram
• Axial Force Diagram
• Nodal deflections
• Support Reactions
• are displayed.

18
Reports in Postprocessor

• Reports generated in the Post -Processor include
• Elemental Results
• Nodal Reactions
• Elemental End Actions
• For the desired load combinations

19
Design

• Design of all R.C.C structural components done
  using clauses of I.S. 456 2000,
• I.S 1893, I.S 13920, as well as I.S 800, for
  steel structures.
• Design of all basic R.C.C structural components
  such as slabs, inclusive of flat slabs, beams,
  columns, shear wall, isolated and combined
  footings, raft, piles as well as Steel trusses.

20
Beam and Footing Reinforcement Details
21
Reports Generated in Design

• Reports generated in the design module include
• Detail Design parameters
• Slab, Beam, Column, Footing Load, detail design,
  Schedule and Quantity reports

22
Drafting

• Transfers the structural detailing drawings, for
  all the designed components to AutoCAD.

23
FOOTING PLAN
24
Some Real Life Buildings designed using STRUDS
25
Thank You
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
(No Transcript)
38
34 storey building designed on STRUDS at
Mulund, Mumbai
39
Thank You