Replacing the compression zone of concrete beams with ductile fiber cement-based composite materials,a locally reinforced concrete beam in the compression zone is prepared,which transforms the mode of fracture of super-reinforced concrete beams from brittle fracture of concrete to compressive ductility yielding of the reinforcement material in the local compression zone,thereby improving the ductility of super-reinforced concrete beams.In order to study the flexural behavior of locally reinforced concrete beams in compression zone,the finite strip method is adopted to establish the section moment-curvature model.With the help of software,a calculation program is compiled to analyze the moment-curvature relationship of locally reinforced concrete beams in compression zone,and a parametric analysis is carried out based on the verified model.The research shows that the model fitting results are consistent with the experimental results.The increase in local reinforcement height,the improvement of fiber-cement-based composite material strength and ultimate strength,and the increase in yield strain of fiber-cement-based composite material will all enhance the ductility of the beam.
关键词
受压区局部增强/纤维水泥基复合材料/延性/受压本构/有限条带法
Key words
local enhancement in the compressed area/fiber cement based composite materials/ductility/compressive constitutive law/finite strip method
维普
万方数据