Experimental investigation on the flexural behavior of steel-concrete composite beams with U-shaped steel girders and angle connectors
Experimental investigation on the flexural behavior of steel-concrete composite beams with U-shaped steel girders and angle connectors
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U型钢梁角钢连接件钢-混凝土组合梁受弯性能试验研究
DOI：
10.1016/j.engstruct.2016.10.037
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发表时间：
2017-01
影响因子：
5.5
通讯作者：
Qu Bing
中科院分区：
文献类型：
--
作者：
Liu Yong;Guo Lanhui;Qu Bing
研究了一种由U形钢梁和角钢连接件组成的新型钢-混凝土组合梁。与传统的由宽翼缘梁和有头剪力栓钉连接件（或短槽形连接件）组成的钢-混凝土组合梁相比，本研究中考虑的组合梁具有良好的抗弯性能，同时降低了由于安装栓钉和/或槽形剪力栓钉连接件而导致的过高成本和潜在的施工挑战。通过五个试件的四点弯曲试验，该研究小组对新型组合梁的弯曲性能进行了实验研究。这五个样本是不同的，有不同的角度连接器的间隔和安装位置。试验结果表明：U形钢梁腹板焊接角钢连接件的组合梁破坏模式为脆性破坏模式，U形钢梁上翼缘焊接角钢连接件的组合梁破坏模式为延性破坏模式。试验结果表明，焊接在上翼缘上的角钢连接件比焊接在腹板上的角钢连接件具有更好的延性。本文还评估了现有的短槽形连接件的公式在量化角连接件的剪切传递能力和角连接件的安装位置对所产生的梁响应的影响方面的充分性。采用Eurocode 4和AISC 360预测的全剪连接组合梁塑性抗弯承载力以及采用Eurocode 4中的插值法预测的部分组合梁极限抗弯承载力与试验结果吻合较好。此外，AS 2327.1规范和AISC 360中忽略折减系数的规定可用于本研究中组合梁的初始刚度估算。
This paper focuses on a new type of steel-concrete composite beams consisting of U-shaped steel girders and angle connectors. Compared with conventional steel-concrete composite beams consisting of wide flange girders and headed shear stud connectors (or short channel connectors), the composite beams considered in this study have favorable flexural performance while reducing the excessive costs and potential construction challenges due to installation of the stud and/or channel shear connectors. Through four-point bending tests on five specimens, this research team experimentally investigated flexural behavior of the new composite beams. The five specimens were varied to have different angle connector intervals and installation locations. Test results show that composite beams with angle connectors welded to the webs of U-shaped steel girder fail in brittle failure modes while composite beam with angle connectors welded on the top flange of U-shaped steel girder fails in ductile failure mode. Based on the test results, it can be concluded that angle connectors welded on the top flange are more ductile than those welded to the webs. This paper also assesses adequacy of the existing formula for short channel connectors in quantifying the shear transfer capacity of angle connectors and the influence of installation location of angle connectors on the resulting beam response. Moreover, plastic moment resistance of the composite beam with full shear connection predicted by Eurocode 4 and AISC 360 and ultimate flexural strength of the partially composite beams predicted by the interpolation method in Eurocode 4 agree well with the experimental results. Besides, specifications in AS 2327.1 and provisions in AISC 360 neglecting the reduction factor could be used to estimate the initial stiffness of composite beams in this study by using cracked moment of inertia.
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影响因子：
3.6
作者：
K. Sennah;J. Kennedy;Said I. Nour
通讯作者：
K. Sennah;J. Kennedy;Said I. Nour
影响因子：
5.5
作者：
I. Ahn;Methee Chiewanichakorn;Stuart S. Chen;A. Aref
通讯作者：
I. Ahn;Methee Chiewanichakorn;Stuart S. Chen;A. Aref
影响因子：
4.1
作者：
H. Ban;Ee Loon Tan;B. Uy
通讯作者：
H. Ban;Ee Loon Tan;B. Uy
影响因子：
4.1
作者：
Chen Xu;Q. Su;C. Wu;K. Sugiura
通讯作者：
Chen Xu;Q. Su;C. Wu;K. Sugiura
DOI：
10.1061/(asce)em.1943-7889.0000320
发表时间：
2012-02
期刊：
Journal of Engineering Mechanics-asce
影响因子：
--
作者：
E. Martinelli;C. Faella;G. Palma
通讯作者：
E. Martinelli;C. Faella;G. Palma