IS 1893-2016 (Part 1)

Know Your IS Code Provisions: A Short Lecture Series on IS 1893-2016 (Part 1)

Criteria for Earthquake Resistant Design of Structures. Part 1 General Provisions and Buildings

 (Full Playlist 53 Videos)

6 General Principles and Design Criteria

• Clause 6.1: General principles
  • Clause 6.1.1: Ground Motion
  • Clause 6.1.2: Factors affecting structure’s response
  • Clause 6.1.3: Actual Earthquake forces
  • Clause 6.1.4: Members and connections
  • Clause 6.1.5: Soil-structure Interaction
  • Clause 6.1.6: Equipment and other systems
    • Definition 3.9: Floor Response Spectrum
  • Clause 6.1.7: Additions to Existing Structures
  • Clause 6.1.8: Change in Occupancy
• Clause 6.2: Assumptions
• Clause 6.3: Load Combinations and Increase in Permissible Stresses 
  • Clause 6.3.1: Load Combinations 
  • Clause 6.3.2: Design Horizontal Earthquake Load 
  • Clause 6.3.3: Design Vertical Earthquake Effects 
  • Clause 6.3.4: Combinations to Account for Two or Three Directional Earthquake Ground Shaking
  • Clause 6.3.5: Increase in Net Pressure on Soils in Design of Foundations 
• Clause 6.4: Design Acceleration Spectrum
  • Clause 6.4.1: Seismic Zones
  • Clause 6.4.2: Design Horizontal Seismic Coefficient
  • Clause 6.4.3: Analysis Types
  • Clause 6.4.4: Number of Modes
  • Clause 6.4.5 Underground Structures
  • Clause 6.4.6 Vertical Ground Motions
  • Clause 6.4.7 Site Specific Spectrum

7 Buildings

• Clause 7.1: Regular and Irregular Configurations
  • Table 5: Plan irregularities
    1. Torsional Irregularity
    2. Re-entrant Corners
    3. Floor Slabs having Excessive Cut-Outs or Openings
    4. Out-of-Plane Offsets in Vertical Elements
    5. Non-Parallel Lateral Force System
  • Table 6: Elevation irregularities
    1. Stiffness irregularity (soft storey)
    2. Mass irregularity
    3. Vertical geometry irregularity
    4. In-plane discontinuity in vertical elements resisting lateral forces
    5. Strength irregularity (weak storey)
    6. Floating or stub column
    7. Irregular modes of oscillation in two-principal plan directions
• Clause 7.2 Lateral force
  • Clause 7.2.1 Design Lateral Force
  • Clause 7.2.2 Minimum Design Lateral Force
  • Clause 7.2.3 Importance Factor (I)
  • Clause 7.2.4 Damping Ratio
    • Definition 3.2: Critical Damping
    • Definition 3.3: Damping
  • Clause 7.2.5 Design Acceleration Spectrum
    • Definition 3.4: Design Acceleration Spectrum
    • Definition 3.22: Response Spectrum
    • Definition 3.23: Design Acceleration Spectrum
  • Clause 7.2.6 Response Reduction Factor (R)
  • Clause 7.2.7 Dual System
• Clause 7.3:  Design imposed loads for earthquake force calculation
• Clause 7.4: Seismic Weight
  • Clause 7.4.1 Seismic Weight of Floors
  • Clause 7.4.2 Other weights
    • Definition 3.24 Seismic Mass of a Floor
    • Definition 3.25 Seismic Mass of a Structure
    • Definition 3.26 Seismic Weight of a Floor (W)
    • Definition 3.27 Seismic Weight of a Structure (W)
• Clause 7.5: Minimum Design Lateral Force
• Clause 7.6: Equivalent Static Method
  • Clause 7.6.1: Design base shear
  • Clause 7.6.2: Approximate fundamental natural period
  • Clause 7.6.3: Vertical distribution of base shear
  • Clause 7.6.4: Diaphragm
    • Definition 4.8: Diaphragm
• Clause 7.7: Dynamic Analysis Method
  • Clause 7.1.1: Linear Dynamic Analysis
  • Clause 7.7.2: Analytical Method
  • Clause 7.7.3: Base shear check
  • Clause 7.7.4: Time history method
  • Clause 7.7.5 Response spectrum method
    • Clause 7.7.5.1 Natural modes of oscillation
    • Clause 7.7.5.2 Number of modes to be considered
    • Clause 7.7.5.3 Combination of modes
      • Definition 3.1: Closely Spaced Modes
    • Clause 7.7.5.4 Simplified method of dynamic analysis of buildings
• Clause 7.8: Torsion
  • 7.8.1 Provision
  • 7.8.2 Design Eccentricity
• Clause 7.9: RC Frame Buildings with Unreinforced Masonry Infills Walls
• Clause 7.10: RC framed buildings with open ground storey
  • Clause 7.10.1 – RC wall or braced
  • Clause 7.10.2 – RC Walls
  • Clause 7.10.3 – Torsion
  • Clause 7.10.4 – Wall plan density
  • Clause 7.10.5 – Ductile detailing
• Clause 7.11: Deformation
• Clause 7.12: Miscellaneous
  • Clause 7.12.1 Foundations
  • Clause 7.12.2 Cantilever Projections
    • Clause 7.12.2.1 Vertical projections
    • Clause 7.12.2.2 horizontal projections
  • Clause 7.12.3 Compound Walls
  • Clause 7.12.4 Connections between parts
• Annexure F: Simplified Procedure for Liquefaction Potential Assessment
  • Definition 3.12: Liquefaction

IS 13920-2016

Know Your IS Code Provisions: A Short Lecture Series on IS 13920-2016

Ductile Design and Detailing of Reinforced Concrete Structures Subjected to Seismic Forces – Code of Practice

• 1. Scope
• 2. References
• 3. Terminology
• 4. Symbols
• 5. General Specifications
• 6. Beams
  • 6.1 General
  • 6.2 Longitudinal Reinforcement
    • 6.2.1 Longitudinal steel in beams
    • 6.2.2 Maximum
    • 6.2.3 …
    • 6.2.4 …
    • 6.2.5 …
    • 6.2.6 Splicing of Longitudinal Bars
      • 6.2.6.1 Lap Splices
      • 6.2.6.2 mechanical Couplers
      • 6.2.6.3 Welded Splices
  • 6.3 Transverse Reinforcement
    • 6.3.1 …
    • 6.3.2 …
    • 6.3.3 …
    • 6.3.4 …
    • 6.3.5 Close Spacing of Links
• 7. Columns and Inclined Members
  • 7.1 Geometry
  • 7.2 Relative Strengths of Beams and Columns at a Joint
  • 7.3 Longitudinal Reinforcement
    • 7.3.1 …
    • 7.3.2 Spacing of longitudinal bars
      • 7.3.2.1 Lap Splices
      • 7.3.2.2 mechanical Couplers
      • 7.3.2.3 Welded Splices
  • 7.4 Transverse Reinforcement
  • 7.5 Design Shear Force in Columns
• 8. Special Confining Reinforcement
• 9. Beam-Column Joints of Moment-Resisting Frames
  • 9.1 Design of Beam-Column Joint for Distortional Shear
    • 9.1.1 Shear Strength of Concrete in a Joint
    • 9.1.2 Design Shear Stress Demand on a joint
    • 9.1.3 Width of Beam-Column Joint
  • 9.2 Transverse Reinforcement
    • 9.2.1 Confining Reinforcement in Joints
    • 9.2.2 …
• 10. Special Shear Walls
  • 10.1 General Requirements
  • 10.2 Design for Shear Force
  • 10.3 Design for Axial Force and Bending Moment
  • 10.4 Boundary Elements
  • 10.5 Coupling Beams
  • 10.6 Openings in Walls
  • 10.7 Construction Joints
  • 10.8 Development, Splice and Anchorage Requirement
    • 10.8.1 …
    • 10.8.2 …
      • 10.8.3 Splices
        • 10.8.3.1 Lap Splices
        • 10.8.3.2 mechanical Couplers
        • 10.8.3.3 Welded Splices
      • 10.8.4 …
• 11. Gravity Columns in Buildings

IS 16700-2017

Know Your IS Code Provisions: A Short Lecture Series on IS 16700-2017

Criteria for Structural Safety of Tall Concrete Buildings

• 1. Scope
• 2. References
• 3. Terminology
• 4. Symbols
• 5. General Requirements
  • 5.1 Elevation
    • 5.1.1 Height Limits for Structural Systems
    • 5.1.2 Slenderness Ratio
    • 5.1.3 Aerodynamic Effects 
  • 5.2 Plan
    • 5.2.1 Plan Geometry
    • 5.2.2 Plan Aspect Ratio
  • 5.3 Storey Stiffness and Strength
  • 5.4 Deformations
  • 5.5 Natural Modes of Vibration
  • 5.6 Floor Systems
    • 5.6.1 Material
    • 5.6.2 Openings
    • 5.6.3 Natural Frequency of Floor System
  • 5.7 Materials
    • 5.7.1 Concrete
    • 5.7.2 Steel
  • 5.8 Progressive Collapse
    • 5.8.1 Possibilities for Progressive Collapse
    • 5.8.2 Requirements of Key Elements
• 6. Loads and Load Combinations
  • 6.1 …
  • 6.2 Wind Loads
    • 6.2.1 …
    • 6.2.2 Site Specific Wind Tunnel Studies
    • 6.2.3 Later Acceleration
  • 6.3 Seismic Effects
• 7. Structural Analysis
  • 7.1 Software
  • 7.2 Considerations
  • 7.3 Modelling
  • 7.4 Building Movements
• 8. Structural Design
  • 8.1 General Requirements
  • 8.2 Ductility
  • 8.3 Frame Buildings
  • 8.4 Moment Frame – Structural Wall Systems
  • 8.5 Structural Wall Systems
  • 8.6 Flat Slab – Structural Wall Systems
  • 8.7 Framed Tube system, Tube-in-Tube System and Multiple Tube System 
• 9. Foundations
  • 9.1 …
  • 9.2 …
  • 9.3 Geotechnical Investigations
  • 9.4 Depth of Foundation
  • 9.5 Podium
  • 9.6 Expansion Joint
  • 9.7 Modelling of Soil
  • 9.8 Settlement of Foundations
• 10. Recommendations for Non-Structural Elements
  • 10.1 Design Strategy
  • 10.2 Design Guidelines – Acceleration Sensitive NSEs
  • 10.3 Design Guidelines – Displacement Sensitive NSEs
• 11. Recommendations for Monitoring Deformations in Buildings
  • 11.1 Earthquake Shaking
  • 11.2 Wind Oscillations
  • 11.3 Foundation Settlement and Pressure Measurement
• Annex A: Guidelines for Approval Process for Design of Code Exceeding Concrete Tall Buildings
• Annex B: Specifications for Concrete in Tall Concrete Buildings

IS 15988-2013

Know Your IS Code Provisions: A Short Lecture Series on IS 15988-2013

Seismic Evaluation and Strengthening of Existing Reinforced Concrete Buildings – Guidelines

• 1. Scope
• 2. References
• 3. Terminology
• 4. Symbols
• 5. Evaluation Criteria
  • 5.1 …
  • 5.2 …
  • 5.3 …
  • 5.4 Lateral Load Modification Factor
  • 5.5 Modified Material Factor
  • 5.6 Evaluation Process
• 6. Preliminary Evaluation
  • 6.1 General
  • 6.2 Site Visit
  • 6.3 Acceptance Criteria
  • 6.4 Configuration-Related Checks
    • 6.4.1 Load Path
    • 6.4.2 Redundancy
    • 6.4.3 Geometry
    • 6.4.4 Weak Storey
    • 6.4.5 Soft Storey
    • 6.4.6 Vertical Discontinuities
    • 6.4.7 Mass
    • 6.4.8 Torsion
    • 6.4.9 Adjacent Buildings
    • 6.4.10 Short Columns
    • 6.4.11 Mezzanines/Loft/Sub-floors
  • 6.5 Strength-Related Checks
    • 6.5.1 Shear Stress in Reinforced Concrete Frame Columns
    • 6.5.2 Shear Stress in Shear Walls
    • 6.5.3 Shear Stress Check for Reinforced Concrete Masonry Infill Walls
    • 6.5.4 Axial Stress in Moment Frames
  • 6.6 Recommendation for Detailed Evaluation
• 7. Detailed Evaluation
  • 7.1 General
    • 7.1.1 Condition of the Building Components
    • 7.1.2 Condition of the Building Materials
  • 7.2 Evaluation Procedure
    • 7.2.1 Probable Flexure and Shear Demand and Capacity
    • 7.2.2 Design Base Shear
    • 7.2.3 Analysis Procedure
    • 7.2.4 Demand-Capacity Ratio
    • 7.2.5 Inter-Storey Drift
  • 7.3 Acceptability Criteria
  • 7.4 Ductility and Detailing Related Evaluation
    • 7.4.1 Moment Resisting Reinforced Concrete Frame Buildings
    • 7.4.2 Concrete Shear Wall Buildings
      • 7.4.2.1 Thickness
      • 7.4.2.2 Overturning
      • 7.4.2.3 Reinforcement
      • 7.4.2.4 Opening in Walls
    • 7.4.3 Reinforced Concrete Frames with Masonry Infill Walls
  • 8. Seismic Strengthening
    • 8.1 General
    • 8.2 Seismic Strengthening Options and Strategies
      • 8.2.1 Strengthening at Member Level
      • 8.2.2 Eliminating of Reducing Structural Irregularities
      • 8.2.3 Strengthening at Structural Level
    • 8.3 Alternate Strengthening Options
      • 8.3.1 Supplemental Damping and Isolation
    • 8.4 Methods of Analysis and Design for Strengthening
      • 8.4.1 Design Criteria
      • 8.4.2 Member Capacities
      • 8.4.3 Analysis Options
    • 8.5 Strengthening Options for Reinforced Concrete Framed Structures
      • 8.5.1 Jacketing
        • 8.5.1.1 Reinforced Concrete Jacketing for Columns
        • 8.5.1.2 …
        • 8.5.1.3 Fibre Jacketing of a Beam
      • 8.5.2 Fibre Jacketing of a Beam
        • 8.5.2.1 Addition of Reinforced Concrete Shear Wall
        • 8.5.2.2 Addition of Steel Bracing
        • 8.5.2.3 …