• Journal of Korean Society of Steel Construction
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• v.12 no.4 s.47
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• pp.339-350
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• 2000

The objective of this study is to investigate the structural behavior of the beam to column connection with reformed T-stubs and to ascertain the application of semi-rigid connection with reformed T-stubs to middle high rise buildings. The tests of steel frame using semi-rigid connections with reformed T-stub and existing T-stub were performed under cyclic loading condition. Finite element analysis was also carried out and the results of FEM were compared with results of tests. The thickness of reformed T-stub and the distance of bolt were used for parameters in the analysis. The structural behaviors of reformed T-stub were understood qualitatively and the possibility of application of semi-rigid connections with reformed T-stubs was ascertained.

• Journal of Korean Society of Steel Construction
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• v.9 no.4 s.33
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• pp.479-487
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• 1997

The use of semi-rigid joints can be considered in the beam-to-column connections of buildings. The advantages of semi-rigid joints can be found in the convenience of construction and the ability of effective moment distribution of members. This study is a basic step to acertain the application of middle high rise buildings by using reformed T-stub, of which rotation capacity is thought to be excellent compared with that of existing T-stubs. The tests of tensile and compressive elements of reformed T-stubs were performed to investigate the behavior of reformed T-stubs. The beam-to-column connections using reformed T-stubs are tested under monotonic loading. The structural behaviors of reformed T-stubs were understood qualitatively and the possibility of application of semi-rigid connections with reformed T-stub was acertained.

• Journal of Korean Society of Steel Construction
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• v.11 no.2 s.39
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• pp.241-241
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• 1999

The analysis and design of steel frames are usually carried out under the assumption that the connections of beam-to-column are either fully rigid or ideally pinned. However the connections actually show semi-rigid behavior in many cases. The authors investigated the structural behavior of simi-rigid connection with reformed T-stub by using of SM490 steel. The objective of the study is to investigate the structural behavior of the beam-to-column semi-rigid connection with reformed T-stub, which is made of SS400 steel. The beam-to-column connections by using reformed T-stubs were tested under monotonic loading and cyclic loading condition. The possibility of application of semi-rigid connections with reformed T-stubs was ascertained from test results.

• Journal of Korean Society of Steel Construction
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• v.11 no.3 s.40
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• pp.271-279
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• 1999

Recently, studies on semi-rigid beam-to-column connections have been done to develop a T-stub element with separators between column face and T-stub flange. In this paper, inelastic analyses for the improved T-stub element are performed, and their results are compared with existing experimental results. The inelastic analyses using gap elements between column face and the separator, and initial stresses at the high-tension bolts result in good agreement with experimental results. Simplified design methods estimating the initial stiffness and the strength of the semi-rigid connection for compression force are proposed.