Nonlinear Performance of a Ten-Story Reinforced Concrete Special Moment Resisting Frame (SMRF)

Abstract eng:
The basic aim of this study is to investigate the nonlinear performance of a ten story special moment resisting frame (SMRF). The elements are designed based on the 1997 edition of the Uniform Building Code for seismic zone 2A. The global and local nonlinear behaviors of the frame are studied under several earthquake ground motions. For this purpose, an inelastic dynamic analysis is performed using three artificial time histories functions generated using SIMQKE_GR program. Nonlinear Static “Pushover” Analyses using various invariant lateral load patterns was also performed. The seismic performance of the structure is determined on the basis of its damage state under an earthquake ground motion. For this purpose, inelastic dynamic and nonlinear static analyses are used to calculate the damage state “drift profiles and inter-storey drifts”. Damage Index from the nonlinear time history analysis is compared with those obtained by pushover analysis procedure. In general, the case study explores variations in the results; it was found that estimates of building response from the nonlinear static analysis are generally insensitive to the pattern of lateral load used to perform the pushover analysis. On the other hand, it was found that building structure’s dynamic response characteristics depend strongly on the load path, properties of the structure and the characteristics of the ground motion.

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