STEEL CONSTRUCTION ENGINEERING
Online ISSN : 1884-0329
Print ISSN : 1880-9928
ISSN-L : 1880-9928
Experiments on Effective Widths and Angles of Gusset Plates Jointed to a Tension Brace with High-Strength Bolts
Kuniaki UDAGAWAShigenori TOGOUSatoshi HIRATA
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2008 Volume 15 Issue 59 Pages 11-22

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Abstract

Tension braces are widely employed to enhance earthquake resistance in steel structures. These tension braces are connected to gusset plates welded to a beam-to-column connection by using high-strength bolts. The gusset plates at joints with high-strength bolts show three modes of failures: net section fracture, bearing fracture and end tearing fracture. In the conventional design method, the ultimate strengths for the net section fractures are evaluated based on an effective area at the last bolt. In this calculation, the width of the effective area is defined as a length for a spread angle of 60°C from the first bolt. However, the spread angle of 60°C is not always accurate depending on the number and edge distances of bolts. In the present research, we examine experimentally the effects of the number and edge distances of bolts on the ultimate strength of the tension gusset plates. We propose the effective widths and the spread angles to predict the ultimate strength of gusset plates for the net section fracture.

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© Japanese Society of Steel Construction
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