Experimental study on the performance of steel-concrete interfaces in circular concrete-filled double skin steel tube
Experimental study on the performance of steel-concrete interfaces in circular concrete-filled double skin steel tube
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DOI：
10.1016/j.tws.2020.106660
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发表时间：
2020-04
影响因子：
6.4
通讯作者：
Wei Li;Bingquan Chen;Lin-Hai Han;D. Lam
中科院分区：
文献类型：
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作者：
Wei Li;Bingquan Chen;Lin-Hai Han;D. Lam
钢和混凝土之间的相互作用对于复合管结构的功能性是重要的。本文通过一系列的推出试验研究了双层钢管混凝土中钢管与夹层混凝土界面的力学性能。有关参数包括内外钢管的径厚比，截面的空心率，钢管表面的粗糙度，混凝土的收缩等粘结应力-滑移关系和应变响应进行了记录和分析，并讨论了不同参数的影响。总体而言，CFDST外钢管与混凝土界面的粘结强度与钢管混凝土（CFST）相当，内钢管与混凝土界面的粘结强度高于外钢管与混凝土界面的粘结强度。
The interaction between steel and concrete is important for the functionality of composite tubular construction. In this study, a series of pushout tests were carried to investigate the behaviour of steel tubes to sandwiched concrete interfaces in concrete-filled double skin steel tubes (CFDST). Parameters concerned included the diameter to thickness ratio of both outer and inner steel tubes, the hollow ratio of the cross section, the roughness of steel tube surfaces, the shrinkage of concrete, etc. The bond stress-slip relationships and the strain responses were recorded and analysed, and effects of different parameters were discussed. In general, the bond strength of the outer steel tube to concrete interface for CFDST was comparable with that of concrete-filled steel tube (CFST), and the bond strength of the inner steel tube to concrete interface was higher than that of the outer steel tube to concrete interface.