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戴 俊,冯昌超 李栋烁 黄斌斌. 不同功率微波照射下钢筋混凝土粘结滑移试验分析[J]. 科学技术与工程, 2020, 20(10): 4119-4124.
Dai Jun,FENG Chang-chao, LI Dong-shuo, HUANG Bin-bin.Experimental Analysis of Bond-slip of Reinforced Concrete under Different Power Microwave Irradiation[J].Science Technology and Engineering,2020,20(10):4119-4124.
不同功率微波照射下钢筋混凝土粘结滑移试验分析
Experimental Analysis of Bond-slip of Reinforced Concrete under Different Power Microwave Irradiation
投稿时间:2019-07-18  修订日期:2020-01-09
DOI:
中文关键词:  微波照射  钢筋混凝土拆除 粘结强度  滑移曲线
英文关键词:microwave  irradiation reinforced  concrete removal  bond strength  slip curve
基金项目:
     
作者单位
戴 俊 西安科技大学建筑与土木工程学院
冯昌超 李栋烁 黄斌斌 西安科技大学建筑与土木工程学院
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中文摘要:
      近年来,微波辅助机械拆除钢筋混凝土对于城市混凝土结构的拆除具有重要意义。为了探讨微波辅助机械拆除钢筋混凝土的断裂过程,采用钢筋混凝土的拉拔试验评价了不同微波功率下钢筋混凝土的粘结滑移曲线。在不同功率微波辐射下,分析了钢筋混凝土的破坏模式,钢与混凝土的粘结强度和粘结刚度。 结果表明:(1)随着微波功率的增加,钢筋与混凝土温度应力差会导致两者之间机械咬合齿抗剪强度的降低;(2)对4种功率微波照射后钢筋混凝土拉拔试验粘结滑移曲线进行分析,认为整个拟合曲线均可由初始滑移段、滑移段、下降段和残余段4段组成。(3)随着微波功率提高,对应的粘结强度降低。5000W功率微波照射条件下粘结强度降低幅度相比3000W时并不显著,故认为采用3000W功率微波照射具有更好的能效比。
英文摘要:
      Recently, microwave-assisted mechanical demolition of reinforced concrete is of great significance for the demolition of concrete structures in urban areas.In order to explore the fracture process of reinforced concrete by microwave-assisted mechanical demolition, the pull-out test of reinforced concrete was used to evaluate the bond-slip curve of reinforced concrete under different microwave powers.The failure mode of reinforced concrete,the bond strength and bond stiffness between steel and concrete were analysed under different power microwave irradiation.The results show that: (1) with the increase of microwave power, the temperature stress difference between steel bar and concrete will lead to the reduction of the shear strength of mechanical occlusal teeth; (2) The bond slip curve of reinforced concrete drawing test is considered to be composed of the initial slip section, the slip section, the descending section and the residual section; (3) With the increase of microwave power, the corresponding bond strength decreases.Under the condition of microwave irradiation of 5000W power, the reduction range of bond strength is not significant compared with that of 3000W power, so it is concluded that the microwave irradiation with 3000W power has better energy efficiency ratio.
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