至今，有關台灣傳統疊斗式木構架與其相關接點之基礎型力學研究仍相當有限。因此，為了減少未來地震所引發的相關破壞，進行疊斗式木構架之耐震行為研究與結構評估是刻不容緩的工作。 本論文的研究對象為台灣疊斗式木構架中位於明間的架棟木構架。第一章主要介紹台灣疊斗式木構造架的基本認知，並簡略帶入其研究動機與執行步驟。第二章的文獻回顧鎖定與疊斗式木構架相關的國內外力學研究。 第三與第四章則開始進入力學實驗的操作與主要的研究成果與討論。
第三章的研究對象著重在疊斗式架棟中的前步口座斗組，試體形式主要分為非對稱與對稱形式等兩種。首先透過面內靜態的實驗，試圖了解非對稱步口座斗組在不同屋頂載重下之結構行為、整體的強度與破壞模式等。再來，則探討不同的結構形式（對稱與非對稱）及屋頂載重的組合下，進行面內震動台實驗。實驗參數為不同的結構形式、屋頂載重與最大地表加速度 (Peak Ground Acceleration; PGA)。所採用的地震歷時為集集地震測站東西向的TCU084，PGA 為0.99g。除了將實驗中取得的破壞模式與過去集集地震報告中所拍攝到的疊斗式木構造之相關破壞照片做比對與討論之外，該次的實驗結果亦可得知，隨著地震力（慣性力）的增加，對稱與非對稱試體的自振頻率與初始剛度均出現下降趨勢。斗在兩種結構形式的測試中都是第一個被破壞的構件，各木構件之間的摩擦力與局部壓縮亦扮演著抵抗與消能的重要角色。對稱木構造也比非對稱木構造更快且更容易產生破壞，因此對稱木構造的剛度也相對下降的比較快。此外，本文擬透過單自由度系統與半功率法分別求出非對稱與對稱試體的初始剛度與阻尼比並與實驗結果做進一步的比對與討論。
第四章的研究對象則著重在疊斗式架棟中的室內點金柱棟架。透過不同的大通接點形式、木材種（福杉與紅檜）與屋頂載重，對三組試體進行一系列的面內靜態實驗，探討點金柱棟架的整體結構形為。實驗規劃主要分成兩個階段進行。第一先用最小位移量 (1/100 rad) 來測試木構架在不同屋頂下的剛度。下一步則進行大位移測試以瞭解該木構架的整體強度與破壞模式。從實驗成果得知，在小位移測試中，垂直載重對試體的結構行為產生如預期的正面影響，換言之，其有效提升疊斗木構架的整體剛度、水平勁度與強度。而在大幅度位移試驗中得以瞭解，點金柱棟架主要受破壞的地方多集中在柱與大通的接點、柱頭斗與束仔的交接點以及瓜筒斗與彎束的交接點。整體構架的變形在未達到1/50旋轉角之前則主要由柱子的剛體旋轉主導。但隨著變形量的增加，柱子的彎矩分佈會如預期從底部衍生至大通與柱的接點，漸而使得大通接點開始承受較大的彎矩與變形。整體而言，大部份的抗彎矩力和變形均由左右兩側的通柱接點來承擔。儘管柱子的持續變形，大通以上的結構大致上仍然相當穩固。
第五章則延用第三與第四章所取得的破壞模式，並以日本學者對於傳統日式木構造的力學研究為計算參考，以手算方式研擬出符合疊斗式座斗組與點金柱棟架的數值模擬分析步驟與計算公式。所模擬出來的成果，與實驗數據套疊比對後發現大致吻合，再次驗證所推算出來的參數與計算方式屬於合理範圍，未來可做為整體結構評估的參考依據。本文的第六章最後總結上述所有實驗的主要成果，並提出未來可從該次研究繼續發展的議題。

To-date, limited number of fundamental studies on the structural behaviour of Dieh-Dou timber frames and its joint connections can be found. Hence, there is an urgency to study and evaluate the seismic performance of the existing Dieh-Dou timber frame buildings so as to prevent as much earthquake-inflicted damages as possible from occurring in the near future. The thesis began by giving a general introduction of the background leading to the motivation of this study, followed by the objectives and methodology of the research. Next, an overview of the literature review was presented by focusing on international and domestic researches that relate to the structural studies of the Dieh-Dou timber frame.
A series of tests was conducted on the corridor structures and internal main frame to investigate and evaluate the structural behaviour of the Dieh-Dou Jia-Dong (架棟) timber frame. One static cyclic test was conducted for the asymmetric corridor structure to investigate the joint behaviour of the structure and the effects of vertical loads on the global structural stiffness. Shaking table tests was then applied to two different structural types (symmetric and asymmetric) of the Dieh-Dou corridor timber structures to explore the dynamic behaviour of the corridor structures under different combinations of structural forms and vertical loads. The damage patterns for the two structural types were traced and compared with the damage observed from the Chi-Chi earthquake reports. Based on the Single-Degree-Freedom (SDOF) system, the derived initial stiffness was compared with the shaking table test results. The damping ratios and maximum response of both structural types were measured and verified with test observations. The observed deformation patterns were cross-referenced with the shaking table tests and the photographic records of the Chi-Chi earthquake.
A series of cyclic loading tests were applied to three Dieh-Dou internal main frames until large deformation. The main goal of the tests was to assess and compare the global behaviour of the internal main frame when subjected to different combinations of vertical loads and primary beam-column joint designs. All the observed damage patterns obtained from the above tests were then used as reference for the mechanical modelling of Dieh-Dou timber frame structures.
Some of the basic Japanese traditional construction principles such as heavy roof loads, ‘Penetrating beam-column joint’ concept, the ‘Dou-stacking’ characteristic and thick column-beam connection are applicable for evaluating the structural performance of the oriental timber frames in general. Furthermore, both Taiwan and Japan encounter similar natural calamities such as earthquakes and typhoons on a yearly basis, hence the Japanese analytical approach was chosen to work out the mechanical models. Fundamental concepts on the implementation of the Japanese approach onto the Dieh-Dou structure elements are explained and the derivation procedures of all the mechanical models for both corridor structure and internal main frame are covered. The derived models were then verified with the experiment data. Although the prediction tends to be on the conservative side, the mechanical model and assumptions can be regarded as valid in general. Finally, a summary of all the important findings gathered from this thesis was presented and potential structural analytical works that could continue from this study are proposed.

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