| 陈宇良*,刘志华,叶培欢,姜锐,徐鸿飞.聚乙烯醇纤维再生混凝土摩擦剪切力学性能试验[J].实验力学,2022,37(5):722~730 |
| 聚乙烯醇纤维再生混凝土摩擦剪切力学性能试验 |
| Experimental study on the mechanical properties of polyvinyl alcohol fiber recycled aggregate concrete under frictional shear |
| 投稿时间：2021-10-22 修订日期：2021-11-10 |
| DOI：10.7520/1001-4888-21-246 |
| 中文关键词: 再生混凝土 聚乙烯醇纤维 摩擦剪切 残余强度 界面摩擦力 |
| 英文关键词:recycled aggregate concrete polyvinyl alcohol fiber frictional shear residual strength interface frictional strength |
| 基金项目:国家自然科学基金(51908141)；中国博士后科学基金(2021M693854)；广西科技基地和人才专项(AD19110068)；广西高校中青年教师科研基础能力提升项目(2019KY0361)；广西水工程材料与结构重点实验室(GXHRI-WEMS-2020-05) |
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| 中文摘要: |
| 为了研究聚乙烯醇(PVA)纤维再生混凝土摩擦剪切力学性能,对30个混凝土立方体试件进行多次摩擦剪切试验,以再生粗骨料取代率、压应力比以及PVA纤维掺量为变化参数,分析其对再生混凝土摩擦剪切强度的影响。结果表明：再生混凝土摩擦剪切峰值强度随摩擦次数的增加而降低,随粗骨料取代率的增大而减小；压应力比为0.2时的剪切峰值强度约为压应力比为0.1时的1.5倍；100%再生粗骨料混凝土摩擦剪切峰值强度随PVA纤维掺量的增加而减小；其中压应力比对残余界面摩擦力耗损影响最大,较大的压应力会加快界面残余强度的耗损速度。 |
| 英文摘要: |
| In order to study the mechanical properties of polyvinyl alcohol (PVA) fiber recycled aggregate concrete when subjected to frictional shear states, experiments were conducted with 30 specimens. The influence of replacement ratio of recycled coarse aggregate, PVA fiber volume incorporation and compressive stress ratio on the friction shear strength were analyzed. The results show that the peak stress of frictional shear of the recycled aggregate concrete decreases with the number of frictional shear and decreases with the increase of the replacement ratio of recycled coarse aggregate. The shear peak stress of 0.2 compressive stress ratio is 1.5 times of the shear peak stress of 0.1 compressive stress ratio. The frictional shear strength of 100% recycled coarse aggregate concrete decreases with the increase of PVA fiber volume incorporation. The compressive stress ratio of the specimens has the greatest influence on the residual interface frictional strength. |
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