Fiber Concrete Beam Failure Observed as Rare Phenomena

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