无梁楼板斜交配筋的受力性能分析  

Mechanical Behavior of Slab-Column System with Steel Bars Along Diagonal Line

作　　者：张涛 吴善能[1] 

机构地区：[1]同济大学土木工程学院建筑工程系,上海200092

出　　处：《结构工程师》2010年第5期44-49,共6页Structural Engineers

基　　金：国家科技支撑计划课题(2006BAJ03A07)

摘　　要：依据现有无梁楼板计算理论和乔汉生屈服准则,对不同配筋方式(斜交配筋、正交配筋)无梁楼板的弹性阶段、弹塑性阶段和极限承载力阶段进行计算分析,并以上海某斜交配筋的仓库为工程实例,采用商业有限元软件建立分层法模型对整个楼盖受荷过程进行数值模拟。通过对不同配筋方式的P-Δ曲线对比,得出:在板两方向配筋率相同的情况下,斜交配筋和正交配筋的两种楼盖极限承载力相差不大,但是斜向配筋可以有效减小板挠度。通过有限元结果与理论计算结果对比,得出分层法有限元模型的模拟精度较好,可以用于工程模拟计算的结论。According to the theory of the slab-column system and the Johansen yield criterion,mechanical behavior of the floor system in its elastic stage,plastic stage and the ultimate state was calculated and analysed.The layered finite element model of a storehouse with steel bars along diagonal line in Shanghai was created.Comparing the curves of P-Δ in two steel laying modes,it was found that the floor's ultimate bearing capacity with the steel bars along diagonal line is almost the same as the floor with steel bars along width-length direction in the same quantity of distributed steel,but the former has a smaller deflection.The data from the finite element analysis is almost the same as the data calculated by the theory of the slab-column system and the Johansen yield criterion,which shows that the layered finite element method could be applied in the analysis of the project.

关 键 词：无梁楼板 斜交 配筋方式 受力性能分析 极限承载力 有限元软件 乔汉生屈服准则 分层法 有限元模型 正交 塑性阶段 数值模拟 曲线对比 模拟精度 模拟计算 楼盖 理论计算 结果对比 计算理论 计算分析 

分 类 号：TU375[建筑科学—结构工程]