加气混凝土墙板抗弯性能研究  

RESEARCH ON BENDING BEHAVIOR OF AUTOCLAVED AERATED CONCRETE SLABS

作　　者：张国伟[1] 陈博珊 苗启松[2] 李光耀[1] 吴徽[1] 

机构地区：[1]北京建筑大学"工程结构与新材料"北京市高等学校工程研究中心,北京100044 [2]北京建筑设计研究院复杂结构研究所,北京100039

出　　处：《建筑技术》2016年第1期56-60,共5页Architecture Technology

基　　金：科研基地建设-节能减排协同创新中心(2011协同创新中心)(2015);北京市新型墙体材料专项基金支持项目(20130910)

摘　　要：为研究各个因素对加气混凝土墙板抗弯性能的影响,6块加气混凝土板进行四分点加载试验。试验结果可得,外挂加气混凝土板以弯剪破坏为主。钢筋与混凝土在较大荷载下发生了粘结滑移现象。钢筋与加气混凝土粘性性能差可总结为以下几个因素,钢筋锈蚀,加气混凝土强度较低,浆体流动性差,钢筋与加气混凝土接触表面积少,无箍筋和光圆钢筋粘结差等因素。最后结合理论分析可知,开裂荷载理论值相比试验值比较保守,具备一定的安全储备。In order to study the bending and bonding property of the autoclaved aerated concrete panels, 6 specimens were tested in a four-point bend test under a test frame using monotonically increasing load till failure. This paper was concemed with the influence of the area of reinforcement on the flexural and bonding performance of AAC slabs. The experimental results show that the failure pattern of AAC panels could be defined as the bending-shear failure and the reinforcing bar skeletons slips during big deformation and load. The result of poor performance on the bond behavior could be summarized as these indexes, such as, the corrosion of bar, the contact area of reinforcing steel bar and AAC, the effect of stirrups, the bad fluidity of slurry and low-intensity of AAC. Besides, a theoretical analysis was conducted to predict the cracking load of the AAC panel. The formula proposed by national standard was conservative, ensuring the large safety stock.

关 键 词：加气混凝土 抗弯试验 粘结性能 外挂墙板 

分 类 号：TU522.32[建筑科学—建筑技术科学]