Experimental Investigation of Block Shear Failure in a Single Angle Tension Member
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Online ISSN 2093-6311 Print ISSN 1598-2351
Experimental Investigation of Block Shear Failure in a Single Angle Tension Member Jagdish R. Dhanuskar1 · Laxmikant M. Gupta1 Received: 13 February 2020 / Accepted: 26 August 2020 © Korean Society of Steel Construction 2020
Abstract A limited test data are available for double-bolt line connection in a single angle tension member, which failed in block shear. To address this, twelve single angle tension members with a double bolt-line connection was reported in this paper, considering the block aspect ratio and connection length as the test parameters. All the tested specimens were failed in block shear. For the tested specimens, numerical analysis was performed, which shows good agreement with experimental results. Experimental outcomes were then compared with the current design provisions present in the IS 800, AISC, CSA, AIJ, EC 3, SBC, and with other existing proposed models. These standards and models show some discrepancies with regard to the experimental results. This discrepancy was due to the shear failure plane position as assumed in the design standards. Those shear planes were specified in the standards as net and gross shear planes. However, the experimental and numerical investigation shows that between the gross shear plane and the net shear plane lies the actual shear failure plane. Based on this, the block shear mechanism was modified and proposed a rational equation that provides a more exact prediction of block shear capacity than the current design standards and the other existing models. The proposed block shear equation shows the precise forecast for both single and double-bolt line connections used in a single angle tension member. Keywords Steel angles · Block shear failure · Tension member · Bolted connection · Shear failure plane
1 Introduction A single angle is the most common section used as a tension member. Tension members connected to the main structure, usually at the ends with the help of connection, either bolted or welded. To reduce the length of the connection bolts provided in double-bolt lines. Figure 1 shows the distinctive block shear mechanism, which is a combination of a shear plane rupture and a tension plane failure. Birkemoe and Gilmor (1978) first identified the failure of a block shear in coped beams. Barthel et al. (1987) reported the earliest block shear failure in angles. Madugula and Mohan (1988) documented 61 tests on the angles in tension out of which 13 failed in block shear. Gross et al. * Jagdish R. Dhanuskar [email protected]; [email protected] Laxmikant M. Gupta [email protected] 1
Department of Applied Mechanics, Visvesvaraya National Institute of Technology, Nagpur 440010, India
(1995), Barthel et al. (1987), Orbison et al. (1999), Barth et al. (2002), Gupta and Gupta (2003) reported a test on single angles and tee specimens connected with the single bolt line connection. Epstein and Adidam (1991), Epstein (1992) conducted the tests on the structural steel angles with un-sta
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