内置钢箱—混凝土简支组合梁受力性能试验  

Experimental research on flexural mechanical properties of simple encased steel box concrete beam

作　　者：解恒燕[1,2] 郑文忠[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]黑龙江八一农垦大学工程学院,大庆163319

出　　处：《哈尔滨工业大学学报》2009年第2期37-42,共6页Journal of Harbin Institute of Technology

基　　金：教育部新世纪优秀人才支持计划资助项目(教科司[2005]290号);黑龙江省科技攻关资助项目(GC04A609);哈尔滨市科技攻关资助项目(2004AA9CS187)

摘　　要：针对内置钢箱-混凝土组合梁单位长度钢箱与混凝土的接触面积相对较小,且钢箱对其腹板两侧的混凝土无法形成如内置H型钢对其腹板有效约束这一特点,完成了5根内置钢箱-混凝土简支组合梁试验,获得了这类梁正截面承载力、裂缝分布与开展、变形发展及破坏特征等方面的试验数据.试验结果表明:这类梁正截面承载力可采用基于平截面假定计算的正截面受弯承载力计算公式中引入折减系数来考虑.给出了符合内置钢箱-混凝土组合梁自身特点的裂缝宽度及刚度计算公式.In consideration that the touching area of steel box of encased steel box concrete beam （ESBCB） in unit length usually is relatively smaller, and the steel box can not restrain the concrete beside the web effectively as the encased H-steel, 5 simple ESBCB are tested. Test data such as flexural carrying capacity, crack distribution and trend, development of deflection and failure characteristics are obtained. The test results show that the flexural carrying capacity of this kind of beam can be got by using the reduction factor in the calculation formula of flexural bearing capacity based on the plane section assumption. The calculation formulas of crack width and stiffness are given which conform to the characteristic of ESBCB.

关 键 词：内置钢箱-混凝土组合梁 正截面受弯承载力 裂缝宽度 刚度 

分 类 号：TU398[建筑科学—结构工程]