钢-混凝土连续叠合梁负弯矩区裂缝宽度研究  

A Study on Crack Width in Negative Moment Area of Continuous Steel-Concrete Composite Beams

作　　者：亓路宽[1] 李琳[1] 张彦林[1] 张治华[1] 

机构地区：[1]北京工业大学建筑工程学院,北京市100022

出　　处：《公路》2007年第7期20-23,共4页Highway

基　　金：北京市教委面上项目(KM200610005006);教育部科学技术研究重点项目(207004)

摘　　要：以钢-混凝土连续叠合梁为研究对象,针对叠合梁负弯矩区裂缝发展及宽度进行了理论分析和试验研究。根据钢和混凝土的应变本构关系,分别考虑了混凝土开裂前后的受力状态,推导出钢-混凝土连续叠合梁负弯矩区裂缝宽度的理论计算公式。同时为了验证理论公式的适用性,进行了钢-混凝土叠合梁裂缝宽度试验研究。从理论与试验结果对比分析得出,在结构裂缝宽度容许范围内该理论公式与试验结果吻合良好。In this paper, the crack width of continuous steel-concrete composite beams in the negative bending area is researched by the way of theoretical and experimental analysis. According to the constitutive relationship between concrete and steel, and the crack width calculated formula is deduced. At the same time, experiments are conducted on composite steel-concrete beams under negative moment in order to examine applicability of the formula. The calculated results are in good agreement with experimental results in the permissible range by comparing data.

关 键 词：钢-混凝土叠合梁 裂缝宽度 理论分析 试验研究 负弯矩 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]