摘要
Abstract
Reinforced truss composite slabs are widely used in prefabricated concrete structures,featuring high strength,large stiffness,and long service life.However,the reinforced truss base slabs have problems such as high self-weight and the complicated construction process caused by exposed steel bar.To address the above issues,this paper proposes an ultra-thin reinforced truss composite slab,where the thickness of the precast base slab is 20 mm and that of the cast-in-place slab is 80 mm.Static load flexural tests were carried out on the ultra-thin composite slab and a cast-in-place slab.And comparative analyses were conducted on the mechanical index parameters of flexural performance,such as bearing capacity,deformation characteristics,and crack development.Test results show that compared with the cast-in-place slab,the average crack spacing of the ultra-thin steel bar truss composite slab is reduced by 36.84%,and its bearing capacity is slightly improved,which conforms to the design concept of"equivalent to cast-in-place",and the precast base slab and the post-poured slab can form a reliable integral structure.关键词
装配式建筑/预制底板/钢筋桁架/叠合楼板/受弯性能Key words
Prefabricated building/Precast slab/Steel bar truss/Ultra-thin composite slab/Flexural performance分类
建筑与水利
