木肋-蒸压轻质加气混凝土组合楼盖受弯承载力研究

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.