A Systematic Review on Progressive Collapse Analysis and Its Mitigation Methods

Abstract

When an essential structural component of a building fails, adjacent structural components that are connected to it also fail, leading to additional structural failure. This process is known as progressive collapse. Many building codes around the world have not taken provisions to ensure such failure. But progressive collapse has caused catastrophic failure in different countries of the world. To understand progressive collapse, its causes and mitigation methods, in depth research is required. Researchers have introduced several analysis procedures by now. Some major analysis mechanics is linear static and dynamic analysis, non-linear static and dynamic analysis and so on. The study discusses various progressive collapse analysis procedures and their relative benefits. Researchers have developed some techniques that are proven to mitigate progressive collapse. Several of these are steel bracing, buckling-restrained brace (BRB), and Carbon Fibre Reinforced Polymers (CFRP) and infill walls. The performance and usability of these methods needs detail investigation for case specific scenario. This paper reviewed the various experimental and numerical research work regarding efficiency and performance of various progressive collapse mitigation techniques. Steel braces can be applied both internally and externally. When steel braces are installed externally, it is improving the steel moment-resisting frames' lateral load resistance. BRB is not only improving stiffness properties of a structure, additionally, they are able to absorb the magnitude of an earthquake. CFRP sheet decreases damage in floors and walls. Increasing the thickness of the infill walls can significantly increase the structural initial stiffness, thus resists progressive failure.