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首页> 外文期刊>European Journal of Environmental and Civil Engineering >Experimental study on the seismic behaviour of the connection between concrete-filled twin steel tubes column and steel beam
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Experimental study on the seismic behaviour of the connection between concrete-filled twin steel tubes column and steel beam

机译：钢管混凝土双柱与钢梁连接处抗震性能的试验研究

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摘要

This study evaluates the feasibility of a new type of connection between the concrete-filled twin steel tubes (CFTST) column and steel beams. The formation and feature of the new connection were described firstly; it mainly consists of vertical stiffeners and embedded anchorage plates. The experiments were conducted on seven one-half scaled specimens including six CFTST column-beam joints and one square concrete-filled steel tube (CFST) column-beam joint. And, seismic behaviours including hysteresis curve, typical failure modes, load-carrying capacity, ductility, energy dissipation capacity, etc. were studied. Connections behaved as predicted that plastic hinges were achieved in steel beams. Connections with ribbed anchorage plates are of higher load-bearing and deformation capacity than connections with no ribs; the extension of the vertical stiffener can move the buckling zone away from the column, so the joint's initial stiffness was improved. The hysteretic characteristic of connections was stable; the energy dissipation capacity, strength and ductility were sufficient. In the whole loading, the stiffness degradation was obvious and bearing capacity degradation was slow. Test results show that connections with good aseismatic behaviour can easily achieve the anti-seismic design principle, namely strong column-weak beam and strong joint-weak member.
机译：这项研究评估了在混凝土双钢管（CFTST）柱和钢梁之间建立新型连接的可行性。首先描述了新连接的形成和特征。它主要由垂直加强筋和嵌入式锚固板组成。实验是在七个半分比例的标本上进行的，其中包括六个CFTST柱梁节点和一个方形钢管混凝土（CFST）柱梁节点。并研究了磁滞曲线，典型破坏模式，承载能力，延性，耗能能力等地震行为。连接的行为如预期的那样，在钢梁中实现了塑料铰链。带肋的锚固板的连接比无肋的连接具有更高的承载力和变形能力。垂直加劲肋的延伸可以使屈曲区域移离圆柱，因此提高了节点的初始刚度。连接的磁滞特性稳定;能量消耗能力，强度和延展性都足够。在整个载荷中，刚度下降明显，而承载力下降缓慢。测试结果表明，具有良好抗震性能的连接可以轻松实现抗震设计原理，即强柱弱梁和强节点弱梁。

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