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Seismic performance and comparison of three different I beam to box column joints

Earthquake Engineering and Engineering Vibration 2014年第4期13卷 717-729页

作者： Z.Saneei Nia A.Mazroi M.Ghassemieh H.Pezeshki School of Civil Engineering College of Engineering University of Tehran Department of Civil Engineering Central Branch of Azad University Building and Housing Researching Center

Despite the inherently advantages of the box column, finding the best option for the I beam to the box column connection is the main challenge in using the box column as a structural member for special moment frames. In this paper, the seismic performance of urtreinforced connection, weakened connection and strengthened connection was evaluated through a comprehensive experimental program. The seismic comparisons were fabricated by assessing the strength, ductility and energy dissipation in each configuration. Three full scale tests with several connections were carried out. All the specimens were subjected to cyclic loading and prior to failure by forming a plastic hinge in the beam, all the connections managed to reach an inelastic rotation of more than 6.0% rad. The experimental and analytical results showed that the seismic performance of the strengthened connection with flange and shear plates turned out to be the most effective in the beam to the box column connection. Moreover, the normalized stress distribution of the continuity plates revealed that the possibility of the weld fracture in unreinforced connection is more than other specimens.

关键词： box column special moment frame unreinforced connection weakened connection strengthened connection seismic comparison

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