陶瓷棉蒸压加气混凝土自保温墙板抗风性能及理论研究

Wind resistance and theoretical research of ceramic cotton autoclaved aerated concrete self-insulation wallboard

为研究陶瓷棉蒸压加气混凝土自保温墙板(简称ALC自保温墙板)的抗风性能,对ALC自保温墙板进行抗弯承载力试验,并与理论计算分析相比较,结果表明,ALC自保温墙板的开裂弯矩的计算值与试验值的比为1.084~1.445,说明开裂弯矩理论计算安全储备较大;正常使用荷载作用下,短期挠度计算值与试验值的比为1.039~1.225,符合JGJ/T 17—2020《蒸压加气混凝土制品应用技术标准》挠度小于L0/200要求;在抗弯极限承载力状态下,ALC自保温墙板发生了以弯曲为主的弯剪破坏,纵向受力钢筋未屈服。因此,基于GB 50010—2010《混凝土结构设计规范(2015版)》公式得到ALC自保温墙板的设计承载力,其理论值与试验值较吻合。

In order to study the wind resistance of a new type of ceramic cotton autoclaved aerated concrete self-insulation wallboard(ALC self-insulation wallboard),the bending capacity test of ALC self-insulation wallboard was carried out and compared with the theoretical calculation.The analysis results show that the ratio of the calculated value of the cracking moment of the ALC self-insulation wallboard to the experimental value ranges from 1.084 to 1.445,indicating that the safety reserve calculated according to the cracking moment theory is large.Under the normal use load,the ratio of the short-term deflection test value to the calculated value is about 1.039~1.225,which meets the deflection limit L0/200 requirements in JGJ/T 17—2020"Technical standard for application of autoclaved aerated concrete product".Under the condition of ultimate flexural bearing capacity,the ALC self-insulation wallboard has bending shear failure,and the longitudinal steel bars have not yielded.Therefore,based on GB 50010—2010"Code for design of concrete structures(2015)"formula,the design bearing capacity of ALC self-insulation wallboard is obtained,and the theoretical value is in good agreement with the experimental value.