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ISSN 2063-5346
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Performance-Based Seismic Design of RC Frame Buildings in Moderate Seismic Zones According to Indian Seismic Code

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Vijay Kumar Baradiya1, Bikram Prasad2
» doi: 10.48047/ecb/2023.12.10.364

Abstract

In earthquakes, reinforced concrete structures can suffer damage due to poor design choices such as using weaker concrete, insufficient reinforcement, or mismatched beam and column strength. This study examines a low-rise office building with a reinforced concrete moment frame structure in seismic zone IV with soil category II. The building's lateral design forces are based on IS 1893:2016, and its design follows IS 456:2000. The use of a strong column-weak beam approach is also imposed by IS 13920:2016. The study aims to assess the seismic resistance of the low-rise office building to ensure its safety during earthquakes. To assess how a structure responds to seismic activity, selected five low-intensity, short-range ground motion data sets and scaled them to match the desired design spectrum. Then measured the structure's seismic response at both Design Basis Earthquake and Maximum Credible Earthquake levels. Through seismic analysis, evaluated the structure's ultimate capacity and distribution of inelastic deformations. We evaluated a structure's desired performance level (IO, LS, and CP) based on ASCE/SEI-41 standards. By examining the ultimate conditions of the structure using both local and global criteria, analysis found that the middle story experienced soft story failure, and the beam's plastic rotations were greater than those of the column. However, the structure met the basic safety objectives of the ASCE/SEI-41 criteria through various performance levels observed at the global and member levels. The design and detailing were effective in preventing the strong beam-weak column failure mechanism, ensuring overall structural safety.

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