摘要
研究了4根钢与高强混凝土组合梁的抗裂性能·试验表明,当荷载达到极限荷载的40%左右,微裂缝首先在加载点下的混凝土板底面出现,然后在加载点间逐渐增加,最后裂缝贯穿板顶;得到组合梁的混凝土板及型钢应变与荷载关系的曲线,分析钢与高强混凝土组合梁工作机理·利用弹性分析理论建立钢与高强混凝土组合梁开裂荷载的计算公式,计算结果与试验结果对比,二者吻合良好·给出了钢与高强混凝土组合梁裂缝宽度的计算公式·
4 composite beams of steel-high strength concrete were tested to investigate their crack resistance. It was found tiny cracks appear firstly on the bottom surface of concrete slab when about 40% of limit load is acting on a beam. Then the cracks increase and further extend out gradually between loading points, and at last, some of them go through the slab from bottom to top. The relationships between strain and load have been obtained for both steel and concrete slab of composite beam, with their bearing mechanisms discussed correspondingly. The formulas to calculate the load causing cracks are given to the beam on elastic basis. The results of calculation and testing show that they are in good conformity to each other. In addition, a width formula is also given to the composite steel-high strength concrete slab.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第1期92-95,共4页
Journal of Northeastern University(Natural Science)
基金
建设部科技攻关项目(2003-2-135)
辽宁省教育厅科技攻关项目(202083067).
