高延性混凝土单轴受压本构模型研究

发布时间：2018-03-13 20:19

本文选题：高延性混凝土　切入点：单轴受压　出处：《西安建筑科技大学学报(自然科学版)》2016年06期 　论文类型：期刊论文

【摘要】：通过9组不同配合比高延性混凝土(high ductile concrete,HDC)试件的单轴受压试验,研究了纤维的横向约束作用对HDC试件单轴受压破坏形态的影响,分析了纤维掺量、粉煤灰掺量、水胶比和砂胶比对HDC单轴受压应力-应变曲线特征点的影响.根据HDC单轴受压应力-应变曲线的形状和特点,采用三种模型,建立了HDC的单轴受压本构模型方程;依据最小二乘法,对HDC单轴受压本构模型进行参数分析发现,采用模型2和模型3得到的拟合曲线与试验曲线吻合较好,其中模型2最接近于试验曲线.
[Abstract]:Through uniaxial compression test of 9 groups of high ductile concrete specimens with different mix ratio, the effect of transverse confinement of fiber on the failure mode of HDC specimen under uniaxial compression was studied. The content of fiber and the amount of fly ash were analyzed. According to the shape and characteristics of HDC uniaxial compression stress-strain curve, the uniaxial compression constitutive model equation of HDC is established by using three kinds of models, according to the influence of water / binder ratio and sand / binder ratio on the characteristic points of uniaxial compression stress-strain curve of HDC, according to the shape and characteristics of HDC uniaxial compression stress-strain curve. According to the least square method, the parameter analysis of HDC uniaxial compression constitutive model shows that the fitting curve obtained by model 2 and model 3 is in good agreement with the experimental curve, and model 2 is the closest to the test curve.
【作者单位】：西安建筑科技大学土木工程学院;成都天华西南建筑设计有限公司;
【基金】：国家自然科学基金资助项目(51578445)
【分类号】：TU528

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