Progressive collapse in an eccentric braced frame through extended progressive collapse analysis algorithm

This study examines the progressive collapse in an eccentric braced frame (EBF) with shear link designed through extended progressive collapse analysis algorithm (EPCA) using Iranian codes of practice for seismic resistance. The algorithm can determine the prominent parameters in progressive collapse analysis such as failure modes, failure loads, critical element removal location and damaged building capacity against this occurrence. These parameters can be devised through pushdown and vertical incremental dynamic analysis. It is concluded that for designing such a frame against a progressive collapse, the implemented load factor should be 2.9. The results also indicate that the studied frame is able to absorb the loss of one column and connected brace against loads at least 2.27 times greater than its nominal applied load before the progressive collapse failure mode occurred. Additionally, upon the removal of elements, the shear link is considered as first failure mode in all cases. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.