文档介绍：华侨大学
硕士学位论文
薄壁U型钢-混凝土组合梁抗剪性能研究
姓名:沈建华
申请学位级别:硕士
专业:结构工程
指导教师:高轩能
20090501
华侨大学 2009 届硕士学位论文薄壁 U 型钢-混凝土组合梁抗剪性能研究
摘要

薄壁型钢-混凝土组合梁是一种新型的组合构件,近年来在工程中得
到了广泛应用。论文采用试验与 ANSYS 有限单元分析相结合的方法对薄
壁 U 型钢-混凝土组合梁的抗剪性能进行了研究。
分别以钢梁腹板高与下翼缘宽度比、剪跨比为研究参数,进行了 8
根薄壁 U 型钢-混凝土组合梁抗剪性能的试验研究,得到了组合梁跨中荷
载-位移曲线、沿截面高度方向的应变分布曲线、剪力-剪应变曲线。试验
结果表明发生剪切破坏的组合梁有较好的延性。
采用 ANSYS 有限单元分析软件对组合梁进行了模拟,模拟结果与试
验结果吻合良好。在此基础上,利用 ANSYS 模型分析了混凝土翼板尺寸、
剪力连接程度、钢梁腹板高与钢下翼缘宽度比、剪跨比等因素对组合梁抗
剪承载力的影响。利用分析结果,回归出组合梁抗剪承载力的计算公式,
并对公式进行了验证,误差在允许范围之内,且计算时可不考虑弯剪相关
性。
研究结果表明:薄壁 U 型钢-混凝土组合梁抗剪承载力不仅来源于钢
梁腹板的抗剪贡献,还来源于混凝土翼板的贡献,以及两者的组合作用。
本文的研究结果可对薄壁 U 型钢-混凝土组合梁的抗剪性能的进一步
研究及理论分析提供参考。

关键词:薄壁 U 型钢-混凝土组合梁;抗剪承载力;剪力连接程度;
剪跨比;有限单元方法

I
ABSTRACT
ABSTRACT

Thin-walled steel-posite beam is a new type posite
and has been widely used in engineering in recently years. The research on the
thin -walled steel-posite beam with U-section is presented
through experiments and ANSYS finite element method.
According to the experiment of eight thin -walled steel-concrete
composite beams with U-sections by changing the proportion of height and
width of the steel beam and the shear span aspect ratio, the loading-deflection
curve of mid-span, the strain curve of mid-span along the profile height and
the shear-shear strain curve of the shear span were received. The experiment
results show that posite beam have good ductility.
Using the general-purpose finite element software, ANSYS version ,
a three-dimensional FE model, has been developed to investigate the
composite beams with U-sections under shear loading. The results based on
ANSYS analysis consist well with the results of the experiments. Then this
verified model is employed to study the parameters that influence the shear
capacity posite beams, such as the dimension of concrete slab, the
degree of shear connection, the proportion of height and width of the steel
beam, the shear span aspect ratio, etc. Usi