Evaluation of Lateral Load Patterns for G+4 Storey R.C.C. Building

Abstract

Earthquakes are known to produce one of the most destructive forces on the earth. It can causes loss of life and property and
economical loss of the country. Earthquake cannot be prevented, since it is unpredictable, but loss of life of people and
damage to the structures can be prevented if later is designed properly. Performance Based Design (PBD) of structure is the
modern approach to earthquake resistant design. The performance of a building depends on various parameters out of which
lateral load pattern is most critical. FEMA-273 and ATC-40 adopts specific pattern of lateral loading for nonlinear static
analysis, widely known as pushover analysis.
For a performance evaluation the load pattern selection is likely to be more critical than the accurate determination of the
target displacement. Here, the evaluation of three different loading patterns namely, Rectangular and Triangular (k=1) as
per FEMA-273 and ATC-40 and Parabolic (k=2) as per IS: 1893(Part 1)-2002 is applied on G+4 storey R.C.C. building for
three different types of building model likely Bare Frame, Infill Wall and Equivalent Strut. Analysis has been carried out
using ETABS (version 9.5). The capacity curve (V/W) to displacement for different levels is obtained for three different types
of lateral loading patterns.