Assessment of reliability of multi-storey building in accordance with Eurocode principles

DOI: 10.37153/2618-9283-2021-5-8-21

Authors:  
Rubric:     Seismic risk and damage   
Key words: reliability, probability of trouble-free operation, reliability index, Pushover method
Annotation:

A method for determining the reliability of a building based on the application of the basic principles of the Eurocode is proposed. Reliability is understood as the probability of trouble-free operation. The transformation of a multi-mass system into an equivalent single-mass nonlinear system was performed using the Pushover nonlinear calculation method (MIDAS/Gen software package). The seismic impact is modeled by a non-stationary random process that is obtained from a stationary one by multiplying by a deterministic envelope. According to EN 1990, the reliability index b is adopted as an indicator of reliability, which is associated with the probability of failure-free operation. An excess of the maximum permissible displacements (misalignment) of the system is taken as a failure. The reliability index is determined using the statistical test method (Monte Carlo method). An example of the calculation of a 9-storey residential building, previously calculated by the spectral method, is given. The floor masses, displacements, and the load-bearing capacity curve and its parameters are taken from the results of the calculation of the building performed using the Midas gen computing complex. The calculation results show the unsatisfactory reliability of the building in terms of the index value. The calculation method can be used to calculate buildings according to special technical conditions (STU).

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