Standard requirement analysis for the progressive collapse structure calculation
The need to calculate structures on the progressive collapse is reflected in a number of codes and standards of the Russian Federation and often plays a crucial role in the design. Analysis of the existing design experience showed that this problem cannot be solved by general methods, its formulation and solution should be reflected in the sets of standards for designing specific buildings and structures. The analysis of the foreign experience shows that the most similar to Russian standards is EN 1991-1-7: 2006, which proposed a developed and integral system of approaches to ensure the reliability of the structures with different responsibility levels for special impacts (accidental actions), including the strategies to protect structures from progressive collapse. The problem is that the modern standards discussed in this article have a number of mistakes. Of course the new SP 385.1325800.2018 has positive innovations, for example, more detailed approaches to the reinforced concrete design, panel buildings, etc. At the same time, it does not fully take into account the requirements of SP 296.1325800.2017 and GOST 27751-2014. The introduction of a new standard not only does not resolve the existing shortcomings and contradictions in the progressive collapse regulatory framework, but only further confuses the situation.