Research On Wave Energy Dissipation Of The Fiber Structure Reinforced Concrete

Concrete is one of the brittle materials, which has low tensile strength, poor toughness and poor impact resistance. At present, researches about how to improve the effect of concrete structure on wave energy dissipation and bring it into the application of civil engineering are paid close attention by internal and foreign researchers. Some researches already show that if the concrete is mixed with the reinforced materials such as fiber and rubber, which can improve the tensile strength, toughness and impact resistance of concrete, would raise the effect of component on wave energy dissipation. So, researching wave energy dissipation of fiber structure is significant to the application of fiber reinforced composite in civil engineering.The energy dissipation of material is related to some factors such as the viscoelasticity and the homogeneity in interface. This thesis has the following research results:(1) based on results ahead, this paper makes analysis of causes about energy dissipation in various point of views of mechanics, and deduces formula to relate the material parameters and energy dissipation, to explore material parameter's impact on energy dissipation. The research results are not only significant to the application of earthquake resistant engineering, but also are positive guidelines for related subjects of wave attenuation, viscoelasticity dynamic damping. (2) Make analysis of theoretical model and experiment in allusion to two series of fiber reinforced composite material, including wavy fiber structure and fiber grid structure, to summarize and optimize the best arrangement form of fiber structure energy dissipation. (3) Suggest a method of calculating loss factor by having the time history signal measurement results such as acceleration, velocity and displacement, providing a new plan for the correlative instruments' application.In allusion to energy dissipation of fiber damping layers composite material, this paper summarizes material parameter's impact on the effect of energy dissipation. First of all, adjusting the fiber layers structure in reason, adopting the fiber and concrete which is with high elastic modulus to improve the composite modulus is the most effective way. Secondly, improving the fiber layer's thickness or increasing the layers' number, also can help the effect of energy dissipation to rise. Finally, although the viscosity coefficient affect the energy dissipating weightily, but can not change the viscosity of material optionally in fact. Moreover, the viscosity coefficient interact with other material parameters, therefore when materials are determined, the viscosity of the material is one of the lesser parameter to be controlled. Moreover, for wave attenuation, This thesis's research results point out as the viscosity or flexibility is higher, the wave attenuation will be stronger.