高雄捷運路竹延伸線之規劃沿台一線省道直接穿越南部科學園區路竹基地，未來捷運通車後，將有可能影響園區內高科技產品之製程及品質。本研究即是於南科路竹基地內進行現地振動衰減試驗，預估捷運振動對於路竹基地之影響，係以人工振源激發地表振動，欲模擬捷運列車行駛所帶來之振動，並於距振源不同距離處量測地表之振動歷時反應，經由資料處理與分析，以評估南科路竹基地內之土層對於振波傳遞之衰減係數與土壤阻尼比。
　　本研究共包含兩部分之試驗，第一部份為落錘振動衰減試驗，係以20噸與32噸之重錘敲擊地表以產生一極大能量之暫態振動；第二部分則為起振器振動衰減試驗，利用起振器產生固定頻率之穩態振動，兩部分試驗皆量測其振動量隨距離達500m之衰減情形，依據現地量測資料進而分析求得衰減係數α、n，並推求土壤之阻尼比。研究結果為：試驗地點於辦公室南側及台一線東側現地之材料阻尼係數α在X方向分別約為0.0088、0.0077（1/m），Y方向分別約為0.0058、0.0044，Z方向分別約為0.0065、0.0052；幾何阻尼係數n在X方向分別約為1.20、1.14，Y方向分別約為1.11、0.93，Z方向分別約為1.02、0.96，由上述之α值計算路竹基地現地土壤阻尼比在應變10-4%時約為1.5~3%之間。此研究成果可提供給高雄捷運與園區內廠房之相關單位在結構上能採取最佳化設計，使得便捷的交通運輸與高科技產業的發展能夠相輔相成。除此之外，本研究亦由此建立一套完整且合理的振動衰減分析流程，推求現地土壤阻尼比，以便合理的預估距振源某一距離之振動量。

　　The Kaohsiung Rapid Transit System will pass through the Southern Taiwan Science Park at Lujhu. After the system is operated, it may affect the process and quality of high-tech products in the Lujhu science-based Park. Thus, an in-site test was performed to investigate the decay of wave motions at the site of Lujhu Park. To excite the ground vibrations, an eccentric shaker and a heavy drop hammer were adopted, respectively. A series of sensitive velocity sensors were deployed at various distances to measure the ground vibrations generated. Based on the data recorded, the attenuation coefficient and soil damping related to the decay of wave motions had been deduced through spectral analyses.
　　To measure the attenuation coefficient of soil, heavy drop hammers and shaker were used as sources in this study. The ground vibration responses extended to 500 meters were measured as the source is created at the ground. Both the vibration attenuation coefficient and soil damping were analyzed from the data measured at the site as a function of frequency. The test results show that the attenuation parameter α is around 0.006, and the soil damping is around 1.5% to 3%. The effects and mitigation methods of vibration induced by the rapid transit system are also evaluated with using the parameters measured in this study.

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