摘要
装配箱混凝土空心楼盖是一种新型的楼盖形式,是由小型预制构件(混凝土叠合箱)与现浇混凝土肋梁结合成具有连续箱型截面的整体结构。该文通过对装配箱混凝土空心楼板试件的试验,分析了该结构的受力性能,得到了楼盖在荷载作用下的破坏机理。通过分析得到预制箱体与现浇混凝土肋梁能够共同工作,在进行楼盖设计计算时,可简化为T型截面进行抗弯计算。抗弯计算时,每根肋梁为一个计算单元,箱体的顶板(底板)可作为肋梁的受压翼缘,翼缘的有效宽度可取肋梁截面宽度与肋梁净距和12倍箱体顶板厚度两者中较小值之和。配置在受拉区的箱体底板内的钢筋能够充分发挥作用,在进行抗弯计算时可考虑其作用。受拉区箱体底板上的裂缝间距和宽度与肋梁的裂缝不同,箱体底板上的裂缝应按钢筋混凝土轴心受拉构件计算,肋梁则应按受弯构件计算。
Assembly Box Concrete Hollow Floor is a new-style whole structure—with a cross section of a concrete box composed of small prefabricated components（concrete superposition box） and a cast-in-place concrete rib beam.The mechanical performance of the structure is analyzed in this paper based on the experiment with the test blocks of assembly box concrete hollow floor,and the failure mechanism affected by the load of floor is obtained.The findings prove that the prefabricated box and the cast-in-place concrete rib beam could interact,and in the calculation of floor framing design,a simplified flexural computing could be used,and each rib beam is taken as one computing unit.The top floor of the box could be used as the compressed flange,and the effective width of the compressed flange could be the sum of the two smaller figures,which are of the depth of 12 times of the box floor and the width of the cross section and the net span of a rib beam.The steel bars installed in the tensile area of the bottom floor of the box could fully exert its role,which could be taken into account in the flexural computing.The rack space and width in the bottom box floor of the tensile area are different from the cracks of the rib beam.The crack of the floor should be computed in accordance with reinforced concrete axial tension components,and that of the rib beam should be done according to the flexural member.
出处
《工程力学》
EI
CSCD
北大核心
2011年第A01期145-150,共6页
Engineering Mechanics
基金
国家自然科学基金项目(51078226)
关键词
装配箱
混凝土楼盖
空心楼盖
受力性能
抗弯计算
裂缝计算
试验研究
assembly box
concrete floor
hollow floor
mechanical performance
flexural computing
crack calculation
experimental study
作者简介
赵考重（1963-），男，山东郓城人，教授，硕士，主要从事工程抗震研究（E—mail：ZKZ@sajzu．edu．cn）；
李自然（1983-），男，山东济宁人，硕士生，从事结构工程专业（E-mail：lizran2003@163．com）；
王莉（1960-），女，山东济南人，高级实验师，主要从事新型结构体系研究（E—mail：w1301@sdjzu．edu.cn）；
孙双军（1982-），男，山东德州人，硕士生，从事结构工程专业（E—mail：sunshuangjunl212@126．com）；
房晓朋（1984-），男，山西平遥人，硕士生，从事结构工程专（E-mail：fxp1984@126．com）；
王超（1987-），男，山东临沂人，硕士生，从事结构工程专业（E-mail：wangcha0052t@163．com）．
