(1 广西岩土力学与工程重点试验室， 桂林 541004；2 桂林理工大学土木与建筑工程学院， 桂林 541004)

［摘要］为研究不同试验参数对充填式窄幅钢箱-混凝土组合连续梁裂缝的影响，设计6根充填式钢箱混凝土组合连续梁。对其采用单调受载试验并分析性能。通过分析6根试件的裂缝分布、裂缝发育过程、裂缝宽度等特征，对可能影响组合梁负弯矩区裂缝的因素如：混凝土翼板配筋率、抗剪连接度和钢箱混凝土充填形式进行了对比分析,发现配筋率对混凝土翼板顶面裂缝有一定影响，其他因素无明显影响。利用现有关于裂缝宽度计算的规范公式对试验梁裂缝宽度进行验算，对比结果表明裂缝宽度试验值与计算值基本吻合。试验及分析结果表明，钢筋配筋率对裂缝宽度有明显影响，其余无明显影响。

［关键词］组合连续梁； 裂缝； 配筋率； 抗剪连接度； 充填形式

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2020)02-0101-06

Influence of different parameters on crack of concrete-filled narrow-width steel box composite continuous beam

Mo Shixu1,2， Zhou Zitao2， Li Junyi2

(1 Guangxi Key Laboratory of Rock-soil Mechanic and Engineering, Guilin 541004, China;2 College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China)

Abstract:In order to study the  influence on crack of the concrete-filled narrow-width steel box composite continuous beam with different test parameters, six concrete-filled narrow-width steel box composite continuous  beams were designed. The monotonic loading test was adopted and the performance of the beams was analyzed. By analyzing the crack distribution, crack development process, crack width and other characteristics of six  specimens, the factors that may affect the cracks in the negative bending moment area of composite beams were compared and analyzed, such as the reinforcement ratio of concrete flange slab, shear connectivity and the filling form of steel box concrete. It is found that the reinforcement ratio has certain influence on the cracks on the top of concrete flange slab, and other factors have no obvious influence. The crack width of test beams was checked by using the existing standard formula of crack width calculation. The comparison results show that the test value of crack width is basically consistent with the calculated value. The test and analysis results show that the reinforcement ratio has obvious influence on the crack width, and other parameters has no obvious influence.

Keywords:composite continuous beam; crack; reinforcement ratio; shear connectivity; filling form

*国家自然科学基金项目（51168011,51108109）。

作者简介：莫时旭，博士，教授，硕士生导师，Email:478990056@qq.com。