单、双向钢-混凝土组合楼盖对比分析及设计建议  

Comparative analysis and design suggestion of one-way and two-way steel-concrete composite floor

作　　者：聂建匡[1] 卜凡民[1] 

机构地区：[1]清华大学土木工程系,结构工程与振动教育部重点实验室,北京100084

出　　处：《建筑结构》2011年第1期1-5,共5页Building Structure

基　　金：国家自然科学基金重点资助项目(50438020)

摘　　要：近年来双向钢-混凝土组合楼盖的应用日益广泛,但对其试验研究和理论分析较少,工程应用中对单、双向钢-混凝土组合楼盖力学特性的差异研究不多,对两种楼盖形式的经济性和适用范围比较模糊。采用非线性有限单元法计算分析了单、双向钢-混凝土组合楼盖静、动力特性,分析结果表明:双向组合楼盖通常具有更高的刚度和承载力,但随着长宽比增大,空间作用降低,单位面积用钢量增加;综合考虑组合楼盖力学特性、经济性以及施工等因素,建议长宽比小于1.3时采用双向布置。Two-way steel-concrete composite floors are widely used in recent years,but experimental study and theoretical analysis are inadequate.The differences between one-way and two-way steel-concrete composite floors are rarely studied in engineering designs,the economical efficiency and scope of application are unclear.A nonlinear finite element analysis method was employed to give comparisons with static and dynamic characteristics between one-way and two-way steel-concrete composite floor.The results show that two-way steel-concrete composite floor has higher stiffness and bearing capacity than one-way steel-concrete composite floor,but the advantages decrease with aspect ratio increasing.On the basis of comprehensive consideration of mechanical characteristics,economical efficiency and construction factors,it is recommended to use two-way steel-concrete composite floor when aspect ratio is less than 1.3.

关 键 词：钢-混凝土组合楼盖 非线性有限单元法 力学特性 经济性 

分 类 号：TU398.7[建筑科学—结构工程]