工程水泥基复合材料受压性能及应力-应变关系研究

李可; 喻鹏; 刘伟康; 王新玲

doi:10.13204/j.gyjz202003030

工程水泥基复合材料受压性能及应力-应变关系研究

doi: 10.13204/j.gyjz202003030

李可¹,
喻鹏¹,
刘伟康²,
王新玲^1, ,

1. 郑州大学土木工程学院, 郑州 450001;
2. 哈尔滨工业大学土木工程学院, 哈尔滨 150001

基金项目:

国家自然科学基金青年项目（51608489，51708511）；国家自然科学基金委河南联合基金项目（U1804137）；国家自然科学基金面上项目（51879243）；河南省自然科学基金项目（182300410210）。

详细信息

作者简介:
李可,女,1985年出生,博士,副教授。

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出版历程
- 收稿日期: 2019-10-20

RESEARCH ON MECHANICAL PROPERTIES AND STRESS-STRAIN RELATIONSHIP OF ECC UNDER COMPRESSION

1. School of Civil Engineering, Zhengzhou university, Zhengzhou 450001, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 通过对5组工程水泥基复合材料（ECC）棱柱体试件及1组水泥砂浆基体试件进行单轴受压试验，研究了聚乙烯醇（PVA）纤维体积掺量、水胶比对ECC棱柱体抗压性能的影响规律以及ECC受压应力-应变全曲线特性。试验结果表明：PVA纤维体积掺量的变化对ECC棱柱体抗压强度影响不大；ECC棱柱体抗压强度随着水胶比降低而增大；ECC棱柱体弹性模量随其抗压强度提高而逐渐增大；PVA纤维体积掺量、水胶比对ECC棱柱体泊松比影响不大，且试验得到ECC棱柱体泊松比平均值为0.27。根据对ECC受压应力-应变试验全曲线进行特征分析，提出ECC轴心受压应力-应变关系模型，并将模型与试验结果对比，验证该模型的准确性。
- PVA-ECC /
- 单轴受压试验 /
- 受压性能 /
- 受压应力-应变关系 /
- 水胶比
Abstract: Through uniaxial compression tests on five groups of ECC (Engineered Cementitious Composites) prismatic specimens and one group of cement mortar matrix specimens, the effects of PVA (Polyvinyl Alcohol) fiber ratio and water-binder ratio on compressive properties of ECC were studied, as well as the characteristics of complete stress-strain curve of ECC under compression. The test results showed that the impact of PVA fiber volume content on prismatic compressive strength of ECC was not significant. The prismatic compressive strength of ECC increased with the decrease of the water-binder ratio. In addition, the elastic modulus of ECC prisms increased with an increase in compressive strength. Moreover, the PVA fiber volume content and water-binder ratio had little effect on the Poisson's ratio of ECC prisms, and the average value of Poisson's ratio of the ECC prisms was 0.27. Besides, based on the characteristics of complete test stress-strain curves of ECC under compression, the stress-strain relationship model of the ECC under axial compression was proposed, and the accuracy of the model was verified by comparison with the experimental results.
- PVA-ECC /
- uniaxial compression test /
- compressive performance /
- compressive stress-strain relationship /
- water-binder ratio

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参考文献(14)

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