木肋-蒸压轻质加气混凝土组合楼盖受弯承载力研究  

Flexural capacity of timber rib-autoclaved lightweight concrete composite floor

作　　者：陆伟东[1,2] 李航宇 顾佳惠 LU Weidong;LI Hangyu;GU Jiahui(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;Institute of Modern Timber Structure,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211816 [2]南京工业大学现代木结构研究所,江苏南京211816

出　　处：《建筑结构学报》2021年第10期96-103,共8页Journal of Building Structures

基　　金：国家重点研发计划(2017YFC0703506)。

摘　　要：木肋-蒸压轻质加气混凝土组合楼盖是由胶合木肋与蒸压轻质加气混凝土板经过优化组合形成的组合楼盖。为了研究该组合楼盖的受力性能,对6组18个木肋-蒸压轻质加气混凝土组合楼盖进行了静力试验,获得了组合楼盖的破坏特征、荷载-挠度曲线、界面滑移分布和跨中截面应变分布等。结果表明:木肋截面高度增加,组合楼盖的承载力明显提高,同时挠度明显减小;螺钉间距增大使组合效应降低,进而导致加气混凝土板与木肋界面滑移增大;随跨度增加,组合楼盖挠度随之增大,但承载力只略有下降。同时,推导了组合楼盖在完全剪力连接以及部分剪力连接下的弹性受弯承载力计算式。将由计算式得到的理论计算值与试验值进行了比较,二者具有良好的吻合度。The timber rib-autoclaved lightweight concrete composite floor is a type of composite floor formed by optimizing the combination of glulam and autoclaved lightweight concrete slabs. To investigate the mechanical properties of the system, six groups of eighteen specimens were tested under static loads. The failure mode, load-deflection curve, interface slip and mid-span strain distribution of the composite floor were studied. The experimental results indicate that with the increase of the height of timber rib section, the flexural capacity increases significantly, while the deflection decreases significantly. Increasing the spacing of screws results in the weakening of composite effect and the increasing of interface slip. As the span of the composite floor increases, the deflection increases significantly, whereas the flexural capacity decreases slightly. The theoretical investigation on the elastic flexural capacity of the composite floor considering full shear connection and partial shear connection was carried out. The comparison shows that the analytical results are in good agreement with the experimental results.

关 键 词：组合楼盖 木肋 蒸压轻质加气混凝土 静力试验 界面滑移 受弯承载力 

分 类 号：TU398.903[建筑科学—结构工程]