Elasticity Theory and Testing of in-Plane Arched Damper
|關鍵字:||面內撓曲;拱形阻尼器;彈性力學;耐震性能試驗;in-Plane Flexure;in-Plane Arched Damper;Elasticity;Seismic Performance Test|
This study proposes an in-plane flexural type damper referred to as the in-Plane Arched Dampers ( i-PAD ) for seismic design of buildings. A linear elastic theory based on elasticity is developed to estimate the initial stiffness and yield strength of the i-PAD. In this paper, a series of full-scale component tests has been conducted and the initial stiffness agrees very well with the theoretical prediction with a difference of 5% which is well within the allowable error of 15% by the code. The hysteresis loops from the component test are steady in repeated cycles and exhibit characteristics of fullness, except for some setback due to gap between the pin and drill hole. They are in good agreement with the ANSYS prediction. In addition, i-PAD shows a more comprehensive and balanced stress distribution pattern than that of the original iii in-Plane flexural damper in the shape of a portal frame, with a better efficiency on material utilization. As a result, the proposed damper is superior in the aspects of ductility and ultimate strength The seismic performance test of the proposed i-PAD shows excellent capability in dynamic response mitigation of the structure. With the dampers implemented, the effective damping ratios of the model structure increase with the earthquake intensity, consistent with the characteristics of nonlinear dampers.