Evaluation of Damage Indicators of Weld and Cyclic Response of Steel Moment Frame Connection Using Side Stiffener Plates

Raftari, M.; Mahjoub, R.; Hekmati, A.

doi:10.22060/ceej.2017.12351.5200

Evaluation of Damage Indicators of Weld and Cyclic Response of Steel Moment Frame Connection Using Side Stiffener Plates

Document Type : Research Article

Authors

Departement Of Civil Engineering, Faculty Of Engineering, Khoramabad Branch, Islamic Azad University, Khoramabad, Iran

10.22060/ceej.2017.12351.5200

Abstract

ABSTRACT: The beam to column connection with side stiffeners in steel moment frames is a moment resisting connection. This type of connection is able to reduce the damage caused by seismic loads. It also has the capability to increase the rate of energy absorption. Moreover, the plastic joints in the base beam significantly reduce the failure of the connection components, including connection region plates, welding, column, etc. In this paper, after introducing the damage indices, the indices were extracted and compared in the weld of the components of connection under cyclic loading. Then, the hysteresis behavior of the connection was examined. For this purpose, modeling was done using finite element method by considering the effects of large deformations. The effects of changes in the thickness of top flange plate, presence or absence of the stiffener plates inside the column and the column thickness changes on the damage indices of the weld of different parts of the connection were studied. Finally, the effect of variations of aforementioned components on the hysteresis parameters of the connection was examined and compared. The results of the present study showed that the variation of the components of connection leads to dramatic changes of a number of damage indices and thereby hysteresis parameters, including the rate of energy loss. As a result, the potential for damage failure may vary.

Highlights

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