钢-混凝土连续组合梁负弯矩区裂缝宽度  

Crack Width in Negative Moment Area of Continuous Steel-concrete Composite Beams

作　　者：亓路宽[1] 李琳[1] 常晶[1] 霍达[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《北京工业大学学报》2008年第7期714-719,共6页Journal of Beijing University of Technology

基　　金：北京市教育委员会科技资助项目(KM200610005006);教育部科学技术研究重点项目(207004)

摘　　要：为了完善钢-混凝土连续组合梁负弯矩区裂缝宽度设计的内容,在充分考虑混凝土开裂前后组合梁的受力状态和钢梁与混凝土接触面的相对滑移对裂缝宽度影响的基础上,根据钢梁和混凝土截面应力和应变的本构关系,推导出钢-混凝土连续组合梁负弯矩区裂缝宽度的理论计算公式,并进行了钢-混凝土组合梁裂缝宽度的试验研究.试验结果表明,在结构裂缝宽度容许范围内该理论公式计算结果与试验结果吻合良好.In order to improve and perfect the design calculation content for crack width of continuous steelconcrete composite beams in the negative bending area, a crack width calculation formula is deduced based on the stress-strain constitutive laws of steel concrete, and experiments are conducted on composite steel-concrete beams. The formula has taken into considerations the behavior of composite beams before and after concrete cracking and influence of relative slippage between the steel beam and the concrete on crack width. The calculated results are in good agreement with experiment and except that there is certain structural crack width which is in the permissible range.

关 键 词：裂缝宽度 组合梁 负弯矩 

分 类 号：TB21[一般工业技术—工程设计测绘]