DETERMINING THE OPTIMAL VALUES OF TARGET RELIABILITY INDEX OF BUILDING STRUCTURES FOR FLAT FLOORS OF FRAME BUILDINGS

Abstract

Target reliability levels recommended in various national and international documents are inconsistent.  In various sources, they are determined depending on the relative costs of safety measures, the consequences of failure, the risk to life, discount rate, etc. It is obvious that the optimal values of reliability index for various designs are very different. In the present paper, a method for determining the target reliability index for flat floor slabs of frame buildings is proposed. This problem is solved based on probabilistic optimization and the societal risk acceptance criterion, which enters the decision as a boundary condition. As a result of the research, the values of the reliability index for flat slabs, with different span sizes and applied loads, were determined.