Research on Constitutive Model of Compressive Damage of Hybrid Fiber Reinforced Cementitious Composites (HFRCC) Under Axial Compression and Experimental Verification

被引：0
|
作者：
Cui T. [1 ]
He H. [1 ]
Yan W. [1 ]
Qian Z. [2 ]
Zhou D. [2 ]
机构：
[1] Beijing Laboratory of Earthquake Engineering and Structure Retrofit, Beijing University of Technology, Beijing
[2] China Railway Construction Group Co., Ltd., Beijing
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 10期
关键词：
Damage constitutive model; Damage correction coefficient; Distribution parameter; Fiber content; Hybrid fiber reinforced cementitious composites;
D O I：
10.11896/cldb.18090251
中图分类号：
学科分类号：
摘要：
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 meaning 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. © 2019, Materials Review Magazine. All right reserved.
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页码：3413 / 3418
页数：5
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