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首页> 外文期刊>International journal of steel structures >Investigation of Composite Action on Seismic Performance of Weak-axis Column-tree Moment Connections
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Investigation of Composite Action on Seismic Performance of Weak-axis Column-tree Moment Connections

机译：复合作用对弱轴柱-树矩节点抗震性能的影响

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摘要

This paper presents an experimental study on a developed weak-axis column-tree moment connection subjected to horizontal cyclic loading. In order to study possible positive or negative effect of a composite slab on the seismic performance of the proposed connection, six cruciform specimens were designed and constructed in pairs, where one specimen was bare steel joint and the other involved a composite slab. The standard, cover-plate, and material-changed connection details were considered. The test program is described in detail, and then the structural behavior of test specimens is discussed based on the test data. The tests revealed that although designed with 50% degree of shear connection, the concrete slab still caused obvious upward shift of the neutral axis and increase the strain demand on the bottom flange. But it is clear from the comparison of results that the composite joint specimens performed slightly better than the bare steel counterparts in terms of load-displacement hysteretic curves and energy dissipation capacity, as the concrete slab could effectively enhance the stability of the steel beam and delay the deterioration of the strength and stiffness. The cover-plate connection appears to be one of the more promising moment connection schemes which are able to deliver a much higher level of stability and energy dissipation capacity. The maximum magnitude of slab-steel beam interface slip was less than 0.5 mm, indicating that the concrete floor slab and steel beam could work well together under 50% partial shear connection.
机译：本文提出了一种在水平循环荷载作用下开发的弱轴圆柱-树弯矩连接的实验研究。为了研究复合板对拟建连接的抗震性能可能产生的正面或负面影响，设计并成对构造了六个十字形试样，其中一个是裸钢接头，另一个则涉及一个复合板。考虑了标准，盖板和材料更改的连接细节。详细介绍了测试程序，然后根据测试数据讨论了试样的结构行为。测试表明，尽管设计时采用了50％的剪力连接，但混凝土板仍然导致中性轴明显向上移动并增加了底部法兰的应变需求。但是从结果的比较可以明显看出，在混凝土的板-混凝土板可以有效地提高钢梁的稳定性和延误性能的基础上，在位移-位移滞回曲线和能量耗散能力方面，复合节试样的性能略好于裸钢。强度和刚度的下降。盖板连接似乎是最有前途的力矩连接方案之一，能够提供更高水平的稳定性和能量消耗能力。楼板-钢梁界面滑移的最大幅度小于0.5 mm，表明混凝土楼板和钢梁在50％的局部剪力连接下可以很好地协同工作。

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