Abstract
AbstractTo reduce the seismic response and residual deformation of structures, this study proposes a super elastic bracing system comprising parallel spine frames with steel rods acting as the braces connecting adjacent spine frames. The brace‐end connections are located on the outer side of the pin supports of spine frames to ensure that the axial deformation of the braces is lower than that of a regular bracing system with identical brace angles. To verify the feasibility and elastic range of the proposed system, cyclic loading tests were conducted using scaled specimens consisting of two spine frames with four different brace configurations. Numerical models created in OpenSees were used to simulate the loading tests appropriately. Four evaluation methods were developed for predicting the force and deformation relation considering the geometrical nonlinearity of the proposed system. Through parametric analyses, the influence of key parameters on structural behaviors is clarified, and the applicability of the evaluation methods is investigated.
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