| As a structural control technology, energy dissipation technology can effectively reduce the seismic response of structures. With in-depth study of materials, the application of energy dissipation technology has made great progress. Among them, steel dampers made by low yield steel exhibit excellent dissipation capacity, and it has attracted wide attention. At present, a series of experiments have been carried out to study the factors of low yield point steel damper energy dissipation ability. Based on these experiments and mechanical properties of the damper, this paper establishes an equivalent analysis model of low yield point steel damper, the main contents of the paper are as follows.Comprehensive study was made about unstiffened plate shear wall. According to the form of its analytical model, an equivalent analytical model for the low yield point steel damper was deduced.Elasticity test and hysteretic test were conducted to a low-yield point steel damper, of which the core panel’s thickness is 11 mm. The initial stiffness of the damper, hysteresis curves, and skeleton curves were obtained. The results show that the damper has a good plastic deformation capacity and energy dissipation. Moreover, according to the actual situation, the low yield point steel damper’s analytical model and meticulous model hysteretic was simulated using ABAQUS, and a selection about low yield steel reinforced model in plastic stage was made.Under the same loading steps, the low yield point steel damper analytical model, experimental results and finite element analysis results were compared. Through analyzing the hysteresis curve, the initial elastic stiffness, skeleton curve and the maximum force, the accuracy and reliability of the analytical model were investigated. The results showed that the analytical model still underestimates the initial stiffness, but its hysteresis performance are very close to experiment results. |
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