Features of the method of calculation of limit states design in emergency situations

Abstract

Annotation. The aim of the article is to illustrate some of the specific features of the method for calculating the limit states of  structures in emergency situations. The relevance of research. The standards of design loads and forces encountered in emergency  situations shall be considered as incidental, which are accounted in their respective emergency combinations. Themselves with the  calculation methods are the same as in conventional design situations. For a number of unique buildings and structures the approach  to the calculation results in an unjustified overestimation of metal bearing structures. In the article the examples of calculation of  load-bearing steel structures in emergency situations, the full depletion of load-bearing capacity, which significantly reducesmetal  consumption, and cost. Methods:implementation of the proposed article algorithms implemented in relation to steel beams. With the  use of engineering methods are determined by quantitative evaluation of the limit loads for beams, corresponding to various  regulatory requirements (regulatory limit states). Results:Quantitative evaluation of maximum loads, indicating that the calculation of load-bearing structures in emergency situations, the full exhaustion of their bearing capacity allows, in some cases significantly increase the maximum allowable load. Practical value:the general principles contained in Article algorithm can be extended to a number of other supporting structures, which should be designed taking into account the possible implementation of a particular emergency, adhering to such algorithms, it is possible to significantly reduce the consumption of materials and the cost of buildings and structures.