Element-based effective width for deflection calculation of steel-concrete composite beams
 作者： Huang Yuan,  Huang Deng,  Yang Yang,  Yi Weijian,  Zhu Zhenggeng 作者单位： 1Hunan Provincial Key Lab on Damage Diagnosis for Engineering Structures, College of Civil Engineering, Hunan University, Changsha, PR China 刊名： Journal of Constructional Steel Research, 2016, Vol.121 , pp.163-172 来源数据库： Elsevier Journal DOI： 10.1016/j.jcsr.2016.02.010 关键词： Composite beam;  Effective width;  Shear-lag;  Deflection;  Design; 英文摘要： Abstract(#br)Traditional definition of the effective width of steel-concrete composite beam is based on a certain beam section. Section-based effective width changes from one section to another along the beam span. Therefore, effective width for deflection calculation of composite beam should be evaluated based on an element, rather than a specific section. This paper firstly presents the development of two theoretical models for composite beams. One is shear-lag slip beam model (SSM), which takes into consideration both slip effects and shear-lag effects. The other is slip beam model (SLM), which only considers the interface slip between steel beam and concrete slab. Validation of the theoretical models is performed through comparison of the theoretical predictions with the results... obtained from more complex finite element simulations. Based on the theoretical models, an element-based definition of effective width for deflection analysis of composite beams is proposed. Parametric studies are performed to find out the most important parameters influencing effective width. It is demonstrated that the effective width is mostly related to the width of the concrete slab, the span of the beam and the thickness of the floor slab. Simplified design formulas for computing the effective width are proposed. Comparisons between the results of the simplified formulas and the test results indicate the accuracy of the proposed formulas.

• width　幅度
• calculation　计算
• concrete　具体
• deflection　偏转
• steel
• composite　复合的
• effective　有效的
• based　基于