This standard provides guidelines for the seismic evaluation of existing reinforced concrete buildings to assess their expected performance in future earthquakes. It outlines procedures for data collection, structural analysis (linear and non-linear methods), and determining deficiencies, forming a basis for deciding if seismic strengthening is required.
Provides guidelines for designing built environments to be accessible to persons with disabilities.
Quick Reference Values
Seismic Demand for Evaluation (MCE)2 times the Zone Factor (Z) from IS 1893
Immediate Occupancy (IO) drift limit (general)~1% story drift
Life Safety (LS) drift limit (general)~2% story drift
Collapse Prevention (CP) drift limit (general)~4% story drift
Knowledge Factor (k) for good knowledge1.0
Knowledge Factor (k) for normal knowledge0.75
Key Formulas
Capacity Spectrum Method (CSM): Graphical procedure to compare seismic capacity (pushover curve) with seismic demand (response spectrum).
Practical Notes
This is a guideline for assessing 'as-is' structures, not a design code for new buildings. Its core is performance-based engineering.
Non-linear Static Pushover Analysis is the primary recommended procedure for evaluation, which requires specialized software (like ETABS, SAP2000) and expertise.
Accurate assessment of existing material properties through Non-Destructive Testing (NDT) and core tests is critical for a reliable evaluation outcome.