| 引用本文: | 王杰堂,王蕊,赵晖,刘发起,张志.闭口型再生混凝土组合楼板受弯性能[J].哈尔滨工业大学学报,2025,57(5):148.DOI:10.11918/202401034 |
| WANG Jietang,WANG Rui,ZHAO Hui,LIU Faqi,ZHANG Zhi.Flexural performance of recycled aggregate concrete composite slabs with closed profiled steel decking[J].Journal of Harbin Institute of Technology,2025,57(5):148.DOI:10.11918/202401034 |
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| 摘要: |
| 闭口型压型钢板再生混凝土组合板在充分利用组合板优点的同时实现废弃混凝土再利用,为此,针对该新型组合板,开展受弯性能试验,考察不同粗骨料取代率下再生混凝土组合板的破坏形态、荷载位移曲线和跨中截面应变发展情况。建立闭口型压型钢板再生混凝土组合板有限元模型,重点分析粗骨料取代率、净跨度与钢板厚度对受弯承载力的影响。最后,基于试验与有限元参数分析结果提出该新型组合板正截面受弯承载力计算公式。结果表明:受弯过程中,中和轴上移幅度随着取代率的增大而减小；不同取代率的闭口型组合板整体呈弯曲破坏形态；再生混凝土组合板的受弯承载力较普通混凝土板下降6.6%~8.9%；考虑钢材截面部分塑性发展及再生骨料取代率影响的简化计算公式可较好预测组合板的受弯承载力。 |
| 关键词: 组合板 再生混凝土 闭口型压型钢板 抗弯性能 |
| DOI：10.11918/202401034 |
| 分类号:TU398.9 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(52108162);中国博士后科学基金(2020M670656) |
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| Flexural performance of recycled aggregate concrete composite slabs with closed profiled steel decking |
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WANG Jietang1,WANG Rui1,ZHAO Hui1,LIU Faqi2,ZHANG Zhi3
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(1.College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 3.Shanxi Second Construction Group Co., Ltd., Taiyuan 030013, China)
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| Abstract: |
| Recycled aggregate concrete (RAC) composite slabs with closed-profiled steel decking not only take full advantages of composite slabs, but also realize the reuse of waste concrete. In this work, flexural tests on this novel composite slabs with different coarse recycled aggregate (CRA) replacement rates were carried out. The failure modes, load-displacement curves and strain development at the mid-span were investigated. Afterwards, a finite element model of the composite slabs was established, and the effects of CRA replacement rate, clear span and thickness of steel decking on the flexural capacity were analyzed. Finally, based on the experimental results and finite element parameter analysis, a calculation formula for the flexural capacity of the new composite slab under positive flexural conditions was proposed. Results indicated that the degree of upward shift of the neutral axis decreases with increasing CRA replacement rate during the whole bending process. The composite slabs with different CRA replacement rates mainly exhibits bending failure. The flexural capacity of recycled concrete composite slabs is 6.6% to 8.9% lower than that of normal concrete slabs. A simplified calculation formula that considers partial plastic development of the steel section and the influence of recycled aggregate replacement rate can effectively predict the bending capacity of the composite slabs. |
| Key words: composite slabs recycled aggregate concrete closed profiled steel sheeting flexural capacity |
