| 不同应变速率下橡胶混凝土损伤本构模型 |
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| 引用本文： | 王攀峰,曹玉贵,邓晓光,李龙龙. 不同应变速率下橡胶混凝土损伤本构模型[J]. 硅酸盐通报, 2022, 41(6): 1912-1919 |
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| 作者姓名： | 王攀峰 曹玉贵 邓晓光 李龙龙 |
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| 作者单位： | 河北省水利规划设计研究院有限公司,石家庄 050011;武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉 430070 |
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| 基金项目： | 国家自然科学基金(51808419)；;湖北省自然科学基金(2019CFB217)； |
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| 摘 要： | 为获得低应变速率下橡胶混凝土的力学性能,本文进行了不同应变速率下橡胶混凝土的轴压试验,分析了混凝土细骨料的橡胶颗粒体积替换率和应变速率对橡胶混凝土力学性能的影响规律。结果表明,随着应变速率的增加,橡胶混凝土的应力-应变关系曲线和抗压强度均呈现增大的趋势,橡胶混凝土初始损伤值呈现递减的趋势,但应变速率对橡胶混凝土的弹性模量影响不显著。当应变速率从3.3×10-5/s增加至3.3×10-3/s时,橡胶体积替换率为0%、20%和30%的橡胶混凝土抗压强度分别增加了31%、24%、10%。当橡胶体积替换率率从0%变化到30%时,承受应变速率为3.3×10-5/s、3.3×10-4/s和3.3×10-3/s的橡胶混凝土抗压强度分别减少了17%、15%、30%;橡胶混凝土的耗能随着加载速率的增加,整体呈现增大的趋势。最后基于试验数据建立了不同应变率下橡胶混凝土的损伤本构关系模型,并采用试验数据验证了新建立模型的准确性。
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| 关 键 词： | 橡胶混凝土 应变速率 应力-应变曲线 峰值应力 峰值应变 损伤演化 |
| 收稿时间： | 2022-01-20 |
Damage Constitutive Model of Rubber Concrete under Different Strain Rates |
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| WANG Panfeng,CAO Yugui,DENG Xiaoguang,LI Longlong. Damage Constitutive Model of Rubber Concrete under Different Strain Rates[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(6): 1912-1919 |
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| Authors: | WANG Panfeng CAO Yugui DENG Xiaoguang LI Longlong |
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| Affiliation: | 1. Hebei Water Conservancy Planning and Design Research Institute Co., Ltd., Shijiazhuang 050011, China; 2. Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | To study the mechanical properties of rubber concrete under different strain rates, this paper presented an experimental study on rubber concrete under axial loading. The effects of rubber replacement ratio of fine aggregates and strain rate on the mechanical behavior of rubber concrete were analyzed. The test results show that the stress-strain curve and compressive strength of rubber concrete have increasing trend with the strain rate increasing, and the initial damage value of rubber concrete shows a decreasing trend with the strain rate increasing. However, the strain rate has insignificant effect on the elastic modulus of rubber concrete. When the strain rate increases from 3.3×10-5/s to 3.3×10-3/s, the compressive strength of rubber concrete with rubber volume replacement ratios of 0%, 20% and 30% increases by 31%, 24% and 10%, respectively. When the rubber volume replacement rate changes from 0% to 30%, the compressive strength of rubber concrete with strain rates of 3.3×10-5/s, 3.3×10-4/s and 3.3×10-3/s is reduced 17%, 15%, 30%, respectively. The energy consumption of rubber concrete tends to increase as the loading rate increases. Finally, a damage constitutive relationship model of rubber concrete under different strain rates is established based on the experimental data, and the accuracy of the newly established model is verified by the experimental data. |
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| Keywords: | rubber concrete strain rate stress-strain curve peak stress peak strain damage evolution |
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