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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/66736

    Title: 應用多項式摩擦單擺支承於橋梁之設計
    Authors: 王濬暉;Wang,Chung-Whui
    Contributors: 土木工程學系
    Keywords: 變曲率隔震支承;變頻隔震支承;公路橋梁耐震設計規範;Variable-curvature seismic isolator;Various frequencies seismic isolator;Seismic Design Provisions and Commentary for Highway Bridge
    Date: 2015-01-20
    Issue Date: 2015-03-16 15:08:02 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 傳統摩擦單擺支承(Friction Pendulum System)其隔震週期為定值,在具長週期脈衝特性之近域地震下易與震波產生共振反應,折損其隔震效用;為了改善此缺點,發展出一具變頻特性之新型摩擦單擺支承:多項式摩擦單擺支承(Polynomial Friction Pendulum Isolator,PFPI),其滑動曲面為一六次方多項式函數,利用支承回復勁度遞減之軟化段降低結構加速度反應,及利用支承回復勁度遞增之硬化段抑制結構位移反應。經研究已證實PFPI可發揮其變頻特性,於近遠域地震中皆可發揮良好的隔震效用。
    ;Since the isolated period of traditional Friction Pendulum System (FPS) is a constant. The potency of FPS will reduce by getting resonated from near-field earthquake with long period of impulse. To improve this defect, a new kind of various-frequencies seismic isolator call Polynomial Friction Pendulum Isolator (PFPI) has been developed. The sliding surface of PFPI is defined by a sixth-order polynomial function. The restoring force processes a softening phase and a hardening phase. The restoring stiffness is decreasing in softening phase to mitigate the acceleration response, and the restoring stiffness is increasing in hardening phase to reduce the displacement response. It has been proven that PFPI can reduce the response of structure efficiently both in far-field and near-field earthquake
    The parameters of PFPI are developed by a hybrid PSO-SA procedure (Particle Swarm Optimization, PSO and Simulated Annealing, SA ) in fore research. It is hard to use for designer in realistic since the optimal parameters is various by setting the different object function in optimal procedure or inputting different ground motions. This study is trying to combine the design of PFPI bridges with the current Seismic Design Provisions and Commentary for Highway Bridge code in Taiwan. Designers can follow a simple process to design the bridge with PFPI according to the local site condition. Finally, compare the response of the PFPI bridges designed by this simple procedure to the non-isolated bridges. The results show that the PFPI bridges designed by this simple procedure can also reduce the seismic response effectively

    Keywords: variable-curvature seismic isolator, various frequencies seismic isolator, Seismic Design Provisions and Commentary for Highway Bridge.
    Appears in Collections:[土木工程研究所] 博碩士論文

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