Research on Constitutive Model of Compressive Damage of Hybrid Fiber Reinforced Cementitious Composites (HFRCC) Under Axial Compression and Experimental Verification
CUI Tao1, HE Haoxiang1, YAN Weiming1, QIAN Zengzhi2, ZHOU Daxing2
1 Beijing Laboratory of Earthquake Engineering and Structure Retrofit, Beijing University of Technology, Beijing 100124 2 China Railway Construction Group Co., Ltd., Beijing 100040
Abstract: In order to investigate the constitutive model and damage evolution rule of hybrid fiber reinforced cementitious composites (HFRCC), the damage constitutive model of specimens mixed with steel-PP and PVA-PP hybrid fibers was studied by statistical method and energy method. By introducing damage variable correction coefficient, the statistical method was optimized, method of energy based on SIR model and code for design of concrete structures were used respectively to derive damage constitutive model and parameters calculation formula. Its physical mea-ning was also discussed and uniaxial compression tests were conducted to verify the accuracy of the model. The results show that the statistical method of stress-strain curve agree well with the test results at low strain, deviation appears when strain turns large, calculate results is more accurate after the damage deformation correction coefficient is introduced, calculate results of energy method based on the SIR model in high precision and can show the residual stress under high strain. The two methods can be used to calculate the compression damage constitutive model of hybrid fiber concrete, which can be applied in engineering.
崔涛, 何浩祥, 闫维明, 钱增志, 周大兴. 混杂纤维水泥基复合材料受压损伤本构模型及试验验证[J]. 材料导报, 2019, 33(20): 3413-3418.
CUI Tao, HE Haoxiang, YAN Weiming, QIAN Zengzhi, ZHOU Daxing. Research on Constitutive Model of Compressive Damage of Hybrid Fiber Reinforced Cementitious Composites (HFRCC) Under Axial Compression and Experimental Verification. Materials Reports, 2019, 33(20): 3413-3418.
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2019, Vol. 33 
