An Experimental Study on Intermissive Fatigue Behaviors of Fiber Cement Beams Based on Viscoelastic Model

The fatigue properties of fiber cement boards are an interesting issue in the modern construction. Cement boards improve impact more resistance and durability to wall surfaces than water-resistant plasterboard. Cement boards are also manufactured in thin sheets of polymer cement that allow bending on load-bearing surfaces. This article introduces an experiment on the bending stiffness of a fiber cement beam under the effect of static load over time. The behavior of the beam follows the creep phenomenon of viscoelastic materials. Therefore, the main purpose of this study is to further study the impact of intermissive fatigue load on the mechanical properties of viscoelastic elements inside fiber cement materials widely used in load-bearing floors in construction projects. At each fatigue vibration, displacement of beam under the effect of static load is measured to check the creep characteristic of the viscoelastic model. Then, vibration response under the effect of impulse load is also measured to check the dynamic effects. Experiment show that intermissive fatigue load significantly affects the creep results of the material but has little effect on the dynamic parameters.