|Title||A new partial-distributed damage method for progressive collapse analysis of steel frames|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Authors||Gerasimidis S, Sideri J|
|Journal||Journal of Constructional Steel Research|
|Keywords||Alternate load path method, Column buckling, Column removal, Damaged steel frames, Loss of stability, Partial damage, Progressive collapse|
The alternate load path method has so far dominated the field of progressive collapse of structures; in order to assess the resilience of structural systems, the concept of the removal of a key element is utilized as a means of damage introduction to the system. Recent studies have indicated that the complete column loss notion is unrealistic and unable to describe a real extreme loading event, e.g. a blast, that will introduce damage to more than one elements in its vicinity. This paper presents a new partial distributed damage method (PDDM) for steel moment frames, by utilizing powerful finite element computational tools that are able to capture loss of stability phenomena. Through the application of a damage index δj and the investigation of damage propagation, it is shown that the introduction of partial damage in the system can significantly modify the collapse mechanisms and overall affect the response of the structure.