| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 88 === In seismic design, a mechanism of inelastic deformation is chosen (for example, for moment resisting frames flexural plastic hinges in the beams and column bases) and the chosen regions of yielding are design for adequate strength and ductility to resist the design seismic actions. Unfortunately, the shear strength in the plastic hinge region will decay during the cycles of inelastic deformation, and the ductile response may be curtailed by the shear failure. An analytical model to predict the shear strength of the plastic hinge under cyclic loading is proposed in this report. Based on the soften strut-and-tie method, the decreased shear strength with increasing displacement demand can be modeled. The calculated shear capacities were compared with the experimental results, and good agreement was obtained.
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