摘要
为研究外包角钢-混凝土组合梁的受力性能,设计并制作了4根外包角钢-混凝土组合梁试件,进行单调静载抗弯承载性能试验。试验实测了跨中挠度、混凝土应变、型钢应变、裂缝宽度等重要数据,绘制出构件荷载-位移曲线、荷载-应变曲线和应变沿截面高度分布的曲线,并对试验结果进行分析。试验结果表明:4根组合梁试件破坏形态均为弯曲破坏;组合梁有较优越的力学性能,承载性能高,延性较好;试件截面平均应变符合平截面假定。
In order to study mechanical behavior of steel-encased concrete composite beams,4 specimens are designed and produced to carry out monotonic static flexural loading performance test.Based on the data of mid-span deflection,strain of concrete and steel,crack width,the curves of load-deflection,load-strain and strain distribution along beam height are drawn and analyzed.It is concluded that failure modes of composite beams are all flexural failure; this kind of composite beams has superior mechanical characters,high bearing properties and excellent ductility; Average strain of section conforms plane section assumption.
出处
《建筑技术》
2014年第6期554-556,共3页
Architecture Technology
基金
国家自然科学基金(50908057
51268004)
广西科学基金(桂科青0832004)
关键词
外包角钢
组合梁
正截面
受力性能
弯曲破坏
angle steel
composite beams
normal section
mechanical behavior
flexural failure
