Fiber concrete beam failure observed as rare phenomena

Investigation of various dynamical natural and technical phenomena is closely connected with studying general nonlinear phenomena characterizing the behavior of dynamical systems. In recent years much attention has been paid to studying new nonlinear effects which can be used in vibro-technique, even in simple systems. Such systems happen to have complicated dynamics which has not been studied sufficiently yet. Fiber concrete beam failure always can be observered as rare phenomena because of existence of considerable dispersion of strength. The aim of this paper is to obtain function described stiffness of fiber concrete beam in the first stage (beam without crack) and at post-cracking stage (beam with crack)