Staad Lecture

STEP 1: STRUCTURAL GEOMETRY I. Introduction II. What does STAAD.pro mean? 1. STAAD.pro is a general purpose program for performing the analysis and design of a wide variety of types of structure. 2. Developer of STAAD.pro REI – Research Engineers International 3. Latest version: STAAD.pro V8i

1. Structural Geometry

y

x 5.0 m

3.5 m

5.0 m

z

3.0 m

4.0 m

III. General Overview: 1. How to open STAAD.pro 2. 4 Types of Structures a. Space b. Plane c. Floor d. Truss 3. STAAD.pro Environment Organization Title Bar 1. Main Menu 2. Toolbar 3. Page Control 4. Data area 5. Main Window

6.0 m

3.5 m

FLOOR FRAMING SYSTEM (typical)

4. Two Coordinate Axes: 1. Classification a. Global Coordinate axis b. Local Coordinate axis

2.8 m 2.8 m

2. Relation/Beta Angle 5. Open an Existing Structure 6. Two methods of Model Generation and Assigning of Structural Data and Relationship a. Graphical User Interface (GUI) b. Input Command Interface 7. STAAD.pro Three Basic Steps 1. Structural Geometry/Model Generation 2. Load System 3. Analysis and Design Three Entities on Modeling 1. Node – joint, junction , intersection and point 2. Member – two node entity E.g. beam, column, truss members 3. Element a. Plate – 3 or 4 node entity E.g. slabs and walls b. Surface Element – 3 to multiple node entity E.g. shear wall and reinforced concrete wall c. Solid entity – 8-node entity E.g. huge solid structures

3.5 m

5.0 m

2.8 m

y

x

4.0 m

z

8.0 m

6.0 m

3.0 m

LEFT SIDE ELEVATION

Property: Exterior Beams: Interior Beams: Intermediate Beams: Rectangular Columns: Circular Columns: Slab Thickness:

0.30 x 0.20 m 0.40 x 0.20 m W 14 x 30 0.40 x 0.25 m 0.30 m diameter 0.100 m

Beta Angle: All exterior columns along z-axis: 90° Spec: Intermediate Beams: Released Mx, My and Mz Support: All Fixed Design Parameters: f’c = 21 MPa fy = 414 MPa

1. Structural Geometry

y

x

6.0 m

STEP 2 LOAD SYSTEM 3.0 m

6.0 m

4.0 m

4.0 m

y

4-Storey Office Building

x

1.5

4.0 m

z

4

4

3.5

4.0 m

z

4

4

4

4

4

4

1.5

4

3.5 3.5

3.0 m

3.0 3.0

FLOOR FRAMING SYSTEM (Typical)

6.0 m

FLOOR FRAMING SYSTEM (Typical) 1.5

7 Balcony

8

8

8

8

1.5

Office

Office

Office

Office

Balcony

Office

Office

Balcony

6.0 m Hallway

3.5 6 Balcony

Office

Office

2.8 m

ARCHITECTURAL PLAN (Typical) 2.8 m 3.0 m

y

4.0 m 6.0 m

6.0 m

x

2.8 m

4.0 m

z SIDE ELEVATION Property: Exterior Beams: Interior Beams: Intermediate Beams: Rectangular Columns: Circular Columns: Slab Thickness: Beta Angle: Selected columns: (Refer to the framing plan)

0.40 x 0.20 m 0.45 x 0.20 m W 16 x 40 0.40 x 0.25 m 0.35 m diameter 0.120 m

90°

2.8 m

8.0 m

2.8 m

y 4.0 m 7.0 m

x

3.5 m

7.0 m

z LEFT SIDE ELEVATION

Property: Exterior Beams: Interior Beams: Intermediate Beams: Rectangular Columns: Slab Thickness:

0.50 x 0.20 m 0.60 x 0.20 m W 14 x 30 0.40 x 0.30 m 0.100 m

Spec: Intermediate Beams: Released Mx, My and Mz (Start and End)

Beta Angle: Selected columns: (Refer to the framing plan)

Support: All Fixed

Spec: Intermediate Beams: Released Mx, My and Mz (Start and End)

Design Parameters: f’c = 27 MPa fy = 414 MPa

Support: All Fixed

90°

Design Parameters: f’c = 27 MPa fy = 414 MPa Load System DEFINE LOADS: I. Seismic Load (as per UBC 1997) 1. Defining Parameters a. Seismic Zone Factor Z = 0.40 (Zone 4) b. Importance Factor I = 1 (standard occupancy) c. Numerical coefficient Rw @ x-direction = 8.5 (SMRF) Rw @ z-direction = 8.5 (SMRF) d. Site Coefficient for Soil Characteristics S = 4 (S4) e. Near Source Factor Na = 1.0 Nv = 1.0 2. Selfweight 3. Joint Weight 4. Member Weight 5. Element Weight 6. Floor Weight II. Wind Load (as per NSCP 2001) 1. Wind Pressure/Intensity: p = qGCp – qh(GCpi) (kPa) 2. Defining Parameters: a. Exposure D b. Wind Speed V = 200 kph c. Importance Factor, Iw = 1 (standard occupancy) Height Wind Intensity 4.0 m 0.88 kPa 6.8 m 0.99 kPa 9.6 m 1.18 kPa 12.4 m 1.19 kPa PRIMARY LOADS 1. E @ x (Earthquake Load at x-axis) UBC Load X 1 2. E @ z (Earthquake Load at z-axis) UBC Load Z 1 3. W @ x (Wind Load at x-axis) Wind Load X 1 4. W @ z (Wind Load at z-axis) Wind Load Z 1 5. D (Dead Load) i. Selfweight (-y direction) ii. Member Load 6” thk CHB (ext partition) 2.73 kPa 7” thk CHB (Int partition) 2.11 kPa Stairs 4.00 kPa iii. Floor Load 25 mm concrete topping 0.70 kPa Floor finish (linoleum) 0.05 kPa Ceiling (10 mm gypsum board) 0.08 kPa Utilities (suspended steel channel) 0.10 kPa Interior Partition 1.00 kPa

Waterproofing 6. L (Live Load) 1. Member Load Stairs 2. Floor/Area Load Office Balcony Hallway Roof Deck LOAD COMBINATION: Refer to NSCP 2010 ACI th AISC 13 Ed

0.07 kPa

4.80 kPa 2.40 kPa 2.90 kPa 4.80 kPa 4.80 kPa