均布荷载下废弃纤维再生混凝土板受力性能
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摘要
为了研究废弃纤维再生混凝土板的受力性能,制作了设计变量为再生骨料取代率和废弃纤维体积掺入量的5块板试件,模拟均布荷载进行了堆载试验。对废弃纤维再生混凝土板的受力过程进行了破坏形貌观测、钢筋应变和板跨中挠度变化等问题的对比分析。试验结果显示,再生粗骨料的加入降低了板试件的承载能力,但是加入废弃纤维可以有效地提高再生混凝土板的承载能力,最优废弃纤维体积掺入量为0. 12%。基于Bailey模型提出了废弃纤维再生混凝土板承载力计算公式,计算结果与试验结果吻合较好。
In order to study the mechanical properties of waste fiber recycled concrete slab,5 pieces of slab specimens were made. The design variables were the replacement ratio of recycled aggregates and the volume of waste fibers. The load tests were carried out by simulated uniform load. The failure process and the strain and deflection of the waste fiber recycled concrete slabs were observed. The test results show that the loading capacity of the specimen is reduced by the addition of recycled coarse aggregates,but it can be improved effectively by adding waste fibers,and the volume of the optimal waste fibers is 0. 12%. A formula for calculating the bearing capacity of waste fiber recycled concrete slabs was put forward. The calculation results coincide well with the test results.
In order to study the mechanical properties of waste fiber recycled concrete slab,5 pieces of slab specimens were made. The design variables were the replacement ratio of recycled aggregates and the volume of waste fibers. The load tests were carried out by simulated uniform load. The failure process and the strain and deflection of the waste fiber recycled concrete slabs were observed. The test results show that the loading capacity of the specimen is reduced by the addition of recycled coarse aggregates,but it can be improved effectively by adding waste fibers,and the volume of the optimal waste fibers is 0. 12%. A formula for calculating the bearing capacity of waste fiber recycled concrete slabs was put forward. The calculation results coincide well with the test results.
引文
1肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008:7-15Xiao Jianzhuang. Recycled concrete[M]. Beijing:China Architecture&Building Press,2008:7-15
2 杜婷,李惠强,吴贤国.再生混凝土的研究现状和存在问题[J].建筑技术,2003,34(2):133-135Du Ting,Li Huiqiang,Wu Xianguo. Current research on recycled concrete and problems needed to resolve[J]. Architecture Technology,2003,34(2):133-135
3 Omary S,Ghorbel E,Wardeh G. Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes properties[J]. Construction and Building Materials,2016,108:163-172
4 章文姣,鲍成成,孔祥清,等.混杂纤维掺量对再生混凝土力学性能的影响研究[J].科学技术与工程,2016,16(13):106-114Zhang Wenjiao,Bao Chengcheng,Kong Xiangqing,et al. Experimental study on mechanical properties of hybrid fiber basic of recycled concrete[J]. Technology and Engineering,2016,16(13):106-114
5 Carneiro J A,Lima P R L,Leite M B,et al. Compressive stressstrain behavior of steel fiber reinforced-recycled aggregate concrete[J]. Cement and Concrete Composites,2014,46(4):65-72
6 刘茂军,王根伟.再生混凝土空心板抗弯承载力试验研究[J].科学技术与工程,2015,15(5):293-310Liu Maojun,Wang Genwei. Experiment on flexural bearing capacity of recycled aggregate concrete hollow slbs[J]. Science Technology and Engineering,2015,15(5):293-310
7 Yazdi M A,Motaghi S,Yang J. The effect of concrete containing recycled concrete aggregate and crushed clay bricks on slab under dynamic loading[J]. Key Engineering Materials,2015(629-630):330-336
8 Bailey C G,Moore D B. The structural behaviour of steel frames with composite floors slabs subject to fire:Part 2:Design[J]. The Structural Engineer,2000,78(11):28-33.
9 孙跃东,肖建庄.再生混凝土骨料[J].混凝土,2004(6):33-36Sun Yuedong,Xiao Jianzhuang. Recycled concrete aggregates[J].Concrete,2004(6):33-36
10 王勇,董毓利,邹超英.钢筋混凝土板极限承载力对比分析[J].哈尔滨工业大学学报,2013,45(8):1-7Wang Yong,Dong Yuli,Zou Chaoying. Comparative analysis of limit carrying capacity of reinforced concrete slabs[J]. Journal of Harbin Institute of Technology. 2013,45(8):1-7
2 杜婷,李惠强,吴贤国.再生混凝土的研究现状和存在问题[J].建筑技术,2003,34(2):133-135Du Ting,Li Huiqiang,Wu Xianguo. Current research on recycled concrete and problems needed to resolve[J]. Architecture Technology,2003,34(2):133-135
3 Omary S,Ghorbel E,Wardeh G. Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes properties[J]. Construction and Building Materials,2016,108:163-172
4 章文姣,鲍成成,孔祥清,等.混杂纤维掺量对再生混凝土力学性能的影响研究[J].科学技术与工程,2016,16(13):106-114Zhang Wenjiao,Bao Chengcheng,Kong Xiangqing,et al. Experimental study on mechanical properties of hybrid fiber basic of recycled concrete[J]. Technology and Engineering,2016,16(13):106-114
5 Carneiro J A,Lima P R L,Leite M B,et al. Compressive stressstrain behavior of steel fiber reinforced-recycled aggregate concrete[J]. Cement and Concrete Composites,2014,46(4):65-72
6 刘茂军,王根伟.再生混凝土空心板抗弯承载力试验研究[J].科学技术与工程,2015,15(5):293-310Liu Maojun,Wang Genwei. Experiment on flexural bearing capacity of recycled aggregate concrete hollow slbs[J]. Science Technology and Engineering,2015,15(5):293-310
7 Yazdi M A,Motaghi S,Yang J. The effect of concrete containing recycled concrete aggregate and crushed clay bricks on slab under dynamic loading[J]. Key Engineering Materials,2015(629-630):330-336
8 Bailey C G,Moore D B. The structural behaviour of steel frames with composite floors slabs subject to fire:Part 2:Design[J]. The Structural Engineer,2000,78(11):28-33.
9 孙跃东,肖建庄.再生混凝土骨料[J].混凝土,2004(6):33-36Sun Yuedong,Xiao Jianzhuang. Recycled concrete aggregates[J].Concrete,2004(6):33-36
10 王勇,董毓利,邹超英.钢筋混凝土板极限承载力对比分析[J].哈尔滨工业大学学报,2013,45(8):1-7Wang Yong,Dong Yuli,Zou Chaoying. Comparative analysis of limit carrying capacity of reinforced concrete slabs[J]. Journal of Harbin Institute of Technology. 2013,45(8):1-7