カバープレート付鉄骨はりと角形鋼管柱接合部の弾塑性挙動

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In the 1995 Hyougoken-Nanbu earthquake, brittle fractures of beam flange in the vicinity of H-shaped beam-to-boxed column (HBBC) moment resisting connections were widely observed. The authors proposed a horizontal haunched beam to improve deformability of the connection. On the other hand, the use of the high toughness material reportedly gives good deformability to the connection by preventing its rupture without a special device such as a haunch. This hinted the use of a simpler method like a cover-plate stiffner to beam-end with high toughness material. However, there is few research on the nonelastic behavior of the cover-plated beam-to-box column connection. Therefore, loading tests were carried out by the authors. The specimens had no defefct because of employing the new welding process and the nondestructive detecting method using a SH ultrasonic wave. In the tests, four specimens having two types of stiffened method, cover-plate and horizontal haunch, were cyclically loaded. The test results indicated that the cover-plate was more effective than the horizontal haunch to increase in deformability of the HBBC connection. The design and calculation method for the haunched beam also could be applied to the cover-plated beam as well as the initial stiffness, the yielding strength, and maximum strength. However, the selection of the column diaphragm thickness needs more reseach on the stress-transition from beam to diaphragms.
社団法人日本建築学会の論文
2001-08-30

カバープレート付鉄骨はりと角形鋼管柱接合部の弾塑性挙動

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