基于塑性理论的钢箱-混凝土组合梁抗弯强度计算  

Bending Strength Calculation of Concrete-Filled Steel Box Beam Based on Plastic Theory

作　　者：莫时旭[1] 廖俊晟[1] 郑艳[1] 钟新谷[2] 

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《桂林理工大学学报》2011年第1期68-72,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(50478099);广西自然科学基金项目(2010GXNSFA013032)

摘　　要：为研究钢箱-混凝土组合梁的结构性能,分析其强度的主要影响因素,利用截面数值积分方法,考虑材料非线性,对钢箱-混凝土组合梁受力全过程的行为进行了理论分析,分析结果与试验结果基本相符;基于塑性理论提出了梁抗弯强度实用计算公式,计算结果与试验结果吻合良好;利用计算公式对钢箱-混凝土组合梁顶板、底板、腹板厚度、混凝土强度等主要参数对梁的抗弯强度的影响进行了分析,结果表明,钢板厚度变化对梁的强度的影响强弱依次为:底板>腹板>顶板,提高混凝土强度可以明显提高梁的强度。In order to investigate the structural behavior of concrete-filled steel box beam and the affecting factors of strength,the full-range loading behavior of concrete-filled steel box beam is analyzed by the numerical combined method.The analysis agrees with the tests basically.The calculated formula of loading capacity of concrete-filled steel box beam is proposed on plastic theory.The calculated results agree with the results of the tests well.The effect of changes in flange plate thickness,web thickness,concrete strength on the strength and deflection of the beam is analyzed using the formula.The results indicate that the effects of the plate thickness changes on the strength of the beam are bottom plate,web and top plate in turn,and the growth of concrete strength can enhance the strength of the beam obviously.

关 键 词：钢箱-混凝土梁 塑性理论 抗弯强度 

分 类 号：TU323.3[建筑科学—结构工程] TU375.1