Disproportionate collapse is a failure where one component of a building leads the collapse of the building. ASCE’s (The American Society of Civil Engineers) newest standard, Standard for Mitigation of Disproportionate Collapse Potential in Buildings and Other Structures, ASCE/SEI 76-23, provides a consensus perspective for mitigating this type of collapse. It describes minimum requirements for planning, assessment, analysis, material selection, design and detailing, construction, and qualification testing to mitigate disproportionate collapse of new and existing buildings and other structures.
The performance-based approach in this standard allows engineers maximum flexibility when finding solutions. Guidance is given about risk assessments and avoidance, as well as characteristics that enhance collapse resistance including the strength, ductility, deformation capacity, and robustness necessary to resist collapse without exceeding relevant limit states. It includes threat-specific and non-threat-specific methodologies and identifies direct design and indirect design approaches.
This standard is intended to address the same structures covered by ASCE 7, Minimum Design Loads and Associated Criteria for Buildings and Other Structures, and structural engineers, architects, and those engaged in preparing and administering local building codes will benefit from this guidance.