本研究選用物化性佳且回收率高之廢棄寶特瓶，再利用為浮動樓板內之一主要構造，依組成材料不同，區分為兩種結構，其一為包含完整寶特瓶，其二則包含瓶蓋與板材，藉由有限元素套裝軟體ABAQUS，數值分析此新型浮動樓板結構力學與聲學行為。首先，建立寶特瓶軸向抗壓力學模型，透過改變寶特瓶之瓶身幾何形狀參數，以及瓶身內添加不可壓縮流體，檢核其承載能力能否達到建築技術規則對樓板之載重標準，同時，藉由市售寶特瓶與瓶蓋抗壓試驗，比對上述數值分析結果。其次，參考CNS規範標準，建立不同材料配置方式之聲學數值分析模型，並且利用MATLAB轉換離散音壓訊號，評定其隔音效能之優劣。比較數值分析與實驗結果顯示，寶特瓶與瓶蓋多具有良好抗壓承載力，另外，若於寶特瓶之瓶身內加入不可壓縮流體，將可提升寶特瓶整體抗壓力學行為。至於聲學數值分析結果顯示，此新型浮動樓板對低頻衝擊噪音之隔音表現可能較弱，然而，若加入適量隔振墊，則確實能有效提升所構成浮動樓板對衝擊音之隔音效能。

Two novel floating floor structures with waste plastic bottles, which have good material properties, are proposed and analyzed here; one comprises waste PET bottles and the other is composed of damping plates made from lots of bottle caps. The mechanical behavior and acoustic response of the novel floating floor structures are first analyzed numerically by using a finite element software ABAQUS and then compared to evaluate the effects of impact sound insulation. At first, the mechanical numerical models of waste PET bottles of various shape geometries with or without incompressible liquid inside were established and employed to check whether their load-bearing capacities reach the requirement requested by the national standard in Taiwan. Furthermore, the numerical results were compared with the experimental results of axial compression tests on waste PET bottles to verify their accuracy and validity. Secondly, the acoustic numerical models of novel floating floor structures with different configurations were established and analyzed according to the CNS standard. The output discrete sound pressures of novel floating floor structures were converted by using MATLAB to evaluate their acoustic performance. The mechanical results show that waste PET bottles and caps have good compressive strengths and thus can be used as constituent materials of the novel floating floor structures. Also, the compressive strength of PET bottles can be enhanced if incompressible liquid is added inside. The acoustic results suggest that the acoustic performance of the novel floating floor structures is less functional against low frequency impact noise. However, the sound insulation performance of the novel floating floor structures can be effectively improved if appropriate vibration isolators are introduced.

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