钢箱-混凝土组合梁正截面强度设计理论与试验研究  

Design theory and experimental study for flexural strength of steel box-concrete composite beam

作　　者：钟新谷[1] 舒小娟[1] 沈明燕[1] 莫时旭[1] 谢文[1] 

机构地区：[1]湖南科技大学,湖南湘潭411201

出　　处：《中国工程科学》2008年第10期47-53,共7页Strategic Study of CAE

基　　金：国家自然科学基金资助项目(50478099)

摘　　要：基于钢箱-混凝土组合梁的基本特性,提出了正截面强度设计理论,并分析梁宽厚比、混凝土套箍效应对正截面强度的影响,提出了该类组合截面的合理尺寸选择原则,分析表明钢箱-混凝土组合梁较空箱的承载力有明显提高,其受力性能明显改善。同时进行3根大比例钢箱-混凝土组合梁的模型试验研究,试验研究表明:钢箱-混凝土组合梁具有良好的抗弯性能和延性,极限承载力提高显著。钢箱-混凝土组合梁通过进一步的试验与理论研究有广泛的应用前景。This article presents design theory for the strength of the cross-section of steel box concrete composite beam, based on the analysis of its mechanic behaviors, analyzes the influence of width- thickness ratio and confined effect on the strength, and puts forward the principles for rational design of its dimensions. The analysis shows that the bearing capacity of such new composite beam increases compared with that of empty steel box beam, and its mechanic behavior is obviously improved. Experimental study of 3 beams shows that steel box composite beam has good behavior of bending resist and flexibility and high bearing capacity. Such kind of beam has widely application prospect after further theoretical and experimental study.

关 键 词：钢箱-混凝土组合梁 设计理论 试验研究 

分 类 号：U44[建筑科学—桥梁与隧道工程]