不同级配粗骨料对橡胶混凝土构件力学性能的分形研究

摘要

基于材性试验研究了粗骨料级配对橡胶混凝土构件强度及弹性模量的影响；通过三根不同级配粗骨料橡胶混凝土梁探讨了粗骨料级配对试验梁受弯承载力、挠度等方面的影响，并研究了三根橡胶混凝土梁在集中荷载下损伤演化过程的分形行为。用分形几何学研究橡胶混凝土梁的损伤演化过程，为橡胶混凝土结构的健康检测和安全性评估提供新的方法。%Different experimental researches were presented. Material properties test explains effects of coarse aggregate gradation on strength and elastic modulus of crumb rubber concrete. Research on three crumb rubber concrete beams with different gradation reveals the impacts of coarse aggregate gradation on flexural capacity, deflection of test beams and so on. Meanwhile, through the analysis of three different coarse aggregate gradation rubber concrete beams, it shows that effects of flexural capacity, deflection, bearing aggregate gradation test beams and researches the fractal behavior of those crumb rubber concrete beams damage evolution process under the concentrated load. Research on evolution process of the fracture of rubber concrete members by using fractal geometry provides a new way for health detection and safety assessment of concrete structure.