高效能結構防震控制系統

Abstract

本文提出一種兼具抗風與耐震功能之增效式高樓振動控制系統，其目的在於有效提昇結構之安全性與舒適性。其設計概念係應用結構控制原理，以質塊制動系統為基礎，利用油壓致動器或高效能伺服馬達驅動質塊以反制結構之振動，並結合機械滑輪裝置放大質塊之衝程，而達到控制增效以及耗電節省的實用性目的。在抗震分析的部分，本文以一棟五層樓鋼構模型為例進行數值模擬分析，評估應用質塊制動系統於結構防震控制之可行性，並針對質塊衝程放大倍率及質塊重量等參數對系統控制效能之影響進行探討。結果顯示，本文提出之系統可提升質塊制動器之控制效能。而在抗風分析的部分，本文以高雄東帝士大樓為對象進行數值模擬分析，評估增效式質塊制動系統與諧調質制動系統及傳統主動質塊制動系統之抗風控制效果。結果顯示，本系統經過適當設計，對於高樓結構抗風具有增效、省能及節省空間的優點。確認主動控制技術在結構防震抗風應用之可行性。

To resolve difficulties encountered by current technology in structural control against earthquakes and severe wind loads, this study proposes a novel high-performance active mass driver (HP-AMD) system. Based on an active mass driver system, the device is integrated with a mechanical pulley system for stroke amplification to simultaneously enhance efficiency and save power. Meanwhile, an instantaneous optimal direct output feedback control algorithm is derived alongside the hardware development. Numerical simulation is performed using a five-story steel frame as the object structure under the 1940 El Centro earthquake. The HP-AMD is further considered for wind vibration control of the 85-story T&C tower of Kaohsiung under wind loads of half year and ten years return period. To gain further insight into the HP-AMD system, the effects of stroke amplification, output feedback position as well as damper weight on system performance are explored. Analysis results demonstrate that the proposed HP-AMD system is a promising means to improve current active structural control techniques.