Abstract
In structural systems, it is a very important issue to predict damage levels of structural components subjected to earthquakes. To appreciate ultimate behaviors and fracture mechanism on the panel zone of structural steels under earthquake loads, it is essential to comprehend damage levels quantitatively. Thus, simple damage models are needed to predict structural components behaviors for random earthquakes effectively. This study proposes a simplified uni-axial hysteretic damage model for panel zone, which is applicable to multi-axial cyclic loading. To confirm the validity of the model, experimental tests are performed under the cyclic shear loading with constant or variable axial loading. The results from the tests are compared with those of the proposed hysteretic model considering the effect of damage. Though limitations are given to the application of this model, this model can predict well the hysteretic behavior of general panel zone applied to multi-axial cyclic loading.
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