自燃煤矸石砂轻混凝土单向叠合板的受弯性能
作者:
作者单位:

1.辽宁工程技术大学 土木工程学院,辽宁 阜新 123000;2.辽宁工程技术大学 辽宁省煤矸石资源化利用及节能建材重点实验室,辽宁 阜新 123000

作者简介:

周 梅(1964—),女,广东潮阳人,辽宁工程技术大学教授级高级工程师,博士生导师,硕士.E-mail:Zhoumei1108@126.vom

中图分类号:

TU375.2

基金项目:

国家自然科学基金资助项目(U1261122);辽宁省教育厅科学技术项目(LJ2019FL006);辽宁工程技术大学学科创新团队资助项目(LNTU20TD-12)


Flexural Behavior of Unidirectional Laminated Plate of Spontaneous Combustion Gangue Sand Light Concrete
Author:
Affiliation:

1.College of Civil Engineering, Liaoning Technical University, Fuxin 123000, China;2.Liaoning Key Laboratory of Coal Gangue Resource Utilization and Energy Saving Building Materials, Liaoning Technical University, Fuxin 123000, China

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    以混凝土组合形式及预制底板自燃煤矸石砂轻混凝土(SSC)的强度等级为变量,制作了5块SSC单向叠合板,通过静力加载试验,对其变形特征、破坏形态和裂缝开展情况进行了分析.结果表明:5块单向叠合板表现出相似的变形特征;分形维数分析表明,适当提高预制底板SSC的强度等级,保证了叠合面不出现滑移;合理设计的半普通混凝土-半SSC和全SSC单向叠合板,均具有良好的整体性和较高的极限荷载,能够作为楼板使用.

    Abstract:

    Using the concrete combination form and the spontaneous combustion gangue sand light concrete (SSC) strength grade of the precast bottom plate as variables, five SSC unidirectional laminated plates were prepared. Through static loading tests, the deformation characteristics, failure modes and crack development were determined. The results show that the five unidirectional laminated plates show similar deformation characteristics. The analysis of fractal dimension shows that the strength grade of SSC with precast buttom plate is appropriately increased to ensure that the slip of superimposed surface does not appear. Reasonably designed unidirectional laminated plate prepared by half-ordinary concrete and half-SSC and all SSC both have good integrity and high ultimate load, and can be used as floor plates.

    表 6 单向叠合板破坏时板侧和板底裂缝形态及分形维数Table 6 Morphology and fractal dimension of cracks on slab side and bottom of unidirectional laminated plates during failure
    表 2 粗集料的基本性质Table 2 Basic properties of coarse aggregate
    表 5 单向叠合板抗弯试验结果Table 5 Flectural test results of unidirectional laminated plates
    表 4 单向叠合板的设计参数Table 4 Design parameters of unidirectional laminated plates
    表 3 混凝土配合比及主要力学性能Table 3 Mix proportions and main mechanical properties of concrete
    表 1 粗集料的主要化学组成Table 1 Main chemical components of coarse aggregates
    图1 单向叠合板配筋详图Fig.1 Cross section of reinforcement diagram of unidirectional laminated plate (size:mm)
    图2 测点布置Fig.2 Layout of measure points (size:mm)
    图3 单向叠合板的荷载-挠度曲线Fig.3 Load-deflection curves of unidirectional laminated plates
    图4 单向叠合板的荷载-混凝土应变曲线Fig.4 Load-concrete strain curves of unidirectional laminated plates
    图5 单向叠合板板侧混凝土应变-截面高度曲线Fig.5 Curves of location-concrete strain of unidirectional laminated plates
    图6 荷载-钢筋应变曲线Fig.6 Load-steel bar strain curves
    参考文献
    相似文献
    引证文献
引用本文

周梅,张院强,杨尚谕,张渤群,张凯.自燃煤矸石砂轻混凝土单向叠合板的受弯性能[J].建筑材料学报,2021,24(5):1066-1072

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-02-26
  • 最后修改日期:2020-04-09
  • 录用日期:2020-04-15
  • 在线发布日期: 2021-12-15
文章二维码