Paper Title : FAILURE STUDY OF SPACE FRAMED STRUCTURE WITH NON LINEAR ANALYSIS
Journal Title : International Journal of Modern Trends in Engineering and Science
Author’s Name : B SASIDHAR REDDY, Sk.MAHABOOB SUBHANI
ISSN no: 2348-3121
Page no: 25-29
Progressive collapse denotes an extensive structural failure initiated by local structural damage, or a chain reaction of failures following damage to a relatively small portion of a structure. Prediction of possible progressive collapse under specific conditions may provide very important information that could be used to control or prevent progressive collapse. Pushover analysis method is a nonlinear static analysis method that could be used in earthquake engineering to calculate the residual capacity of two frames designed for different seismic region to resist progressive collapse under a missing column scenario.
The present study describes the comparison between the irregular steel space frameworks with and without having considerable progressive collapse cases using nonlinear static analysis. Pushover analyses using various invariant lateral load patterns and modal pushover analysis were performed on steel moment resisting frames. The results revealed that the steel space frameworks with progressive collapse cases showed a large decrement in the maximum base share and maximum displacement capacity compared to their irregular steel space frameworks without progressive collapse cases. The results of the pushover analysis also confirmed that the irregular steel space frames works with progressive collapse cases have significantly improved stability in seismic zones over their counterparts without progressive collapse cases
Keywords – Pushover, Progressive collapse, Bases hear, Capacity curve, Zones, Displacement.