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超高性能纤维混凝土力学性能试验与有限元模拟研究

作者:闫高峰1,陈凡2,张文昌2

关键字:超,高性能,纤维,混凝土,力学性能,试验,与,

 
(1.山西省建设工程质量监督管理总站,山西 太原  030013;
2.中国建筑第二工程局有限公司,北京  100010)
    摘要:研究了超高性能纤维混凝土(UHPFRC)的抗拉、抗压性能,并与普通强度混凝土(NC)进行了对比。通过圆柱体、立方体抗压试验、棱柱体弯曲试验和圆柱体劈裂拉伸试验评估材料在压缩和拉伸下的极限承载力与弹性模量。采用有限元软件ABAQUS对UHPFRC的力学性能进行了模拟。结果表明:在缺乏试验数据的情况下,利用塑性损伤本构(CDP)模型定义UHPFRC能够较好地模拟该种材料的力学性能,两者吻合性较好。
    关键词:超高性能纤维混凝土;拉压应力应变;混凝土塑性损伤;有限元模拟;弹性模量
    中图分类号:TU528.01        文献标识码:A        文章编号:1001-702X(2020)09-0173-06
 
Mechanical properties test and finite element simulation of ultra-high performance concrete
YAN Gaofeng1,CHEN Fan2,ZHANG Wenchang2
(1.Shanxi Construction Engineering Quality Supervision and Supervision Terminal,Taiyuan 030013,China;
2.China Construction second Engineering Bureau Co. Ltd.,Beijing 100010)
    Abstract:The ultimate bearing capacity and elastic modulus of materials under compression and tension are evaluated by compression test of cylinder and cube,bending test of prism and splitting tensile test of cylinder. Then the mechanical properties of UHPFRC were simulated by commercial finite element software ABAQUS. The results show that:based on the lack of experimental data,the plastic damage constitutive law(CDP) model in the finite element model is used to define the UHPFRC material,which can better simulate the mechanical properties of the material.
    Key words:ultra-high performance fiber concrete,compression and tensile stress strain,concrete plasticity damage,finite element modelling,elasticity modulus