Progressive collapse of framed structures: Suggestions for robustness assessment

The term progressive collapse has been used to describe the spread of localfailure in a manner analogous to a chain reaction that leads to partial or total collapse of astructure. robustness is dened as a fundamental property of structural systems to preventdamage propagation and to mitigate the potential of progressive collapse. in this paper, theprogressive collapse capacity of steel moment-resisting frames was rst investigated usingthe alternative load path method, then suggestions are made for assessment of structuralrobustness, and the robustness of frames is quantied. according to the results, therobustness and progressive collapse potential of the frames varied signicantly, dependingon the location of the initial local failure and number of building stories