砌體造牆體普遍存在於台灣地區之古蹟與歷史建築中，這些牆體除了空間上之界定和圍封功能，也是整個建築物耐震上不可或缺之一部分。一般而言，砌體受面內地震力時，具有相當之強度，而受面外力時，則因缺乏韌性，經常產生無預警之傾倒與崩塌等破壞。目前國內有關砌體構造之面外行為研究極為稀少，尤其常見於古蹟、歷史建築之清水磚牆面外行為及補強作法更付之闕如。為了建立此方面之技術，以為修復設計之應用，本論文針對三邊固定之清水磚牆，進行水平面外力作用下之損壞行為改善與補強實驗探討。
探討方式主要係利用9道清水磚牆試體(215cmx154cmx11cm)進行水平面外加載，經由記錄到之加載與面外變形關係，以及觀察到之破壞模式發展，來探討三種補強方式(牆頂剛性圈樑補強、牆頂貼附補強、牆頂貼附加垂直束帶補強)與未補強試體之破壞行為差異與強度提升之成效。
經由試驗之探討，本研究獲得以下四點結論：
1.未補強試體在達到極限載重前，其面外破壞發展過程為：(1) 試體頂部中央之垂直裂縫，(2)試體底部之水平裂縫，(3)試體於兩側束制邊緣及距離底部三分之一高度處形成U字型裂縫，U字型裂縫產生後達到極限加載。
2.剛性圈樑補強方式可改善牆頂自由端之變形，使牆體在極限載重之前維持相同之剛度，極限載重較未補強試體提升約100%。
3.牆頂貼附補強方式用以加強自由端之抗彎能力，此能力取決於材料強度與介面黏著強度之大小，極限載重提升約40%~100%。
4.牆頂貼附加垂直束帶補強改善牆面整體之抗彎能力，將破壞分散至牆體各處，視補強材與黏著強度而定，其極限載重提升約90%~200%。

In Taiwan, large part walls of historic buildings are constructed of bricks. The brick wall is not only used to enclose the building or to part the room, in structure, it also act as a major element for resisting the earthquake excitation. The structural behavior of brick wall, in general, has good capability to resist in-plane earthquake load, however, under out-of-plane earthquake load, serious damage caused by collapsing or overturning is often found. For improving this problem, so far, only scarcely study has been executed in Taiwan, especially for the brick wall of historic building. In this thesis, for the conservation purpose, a series of test of brick wall has been conducted. The investigation concentrates at the out-of-plane damage behavior of strengthened brick walls. The walls are constrained in the two vertical edges and lower edge.
The strengthening methods adopted in this study can be divided in three categories. The first category applies confine member along the upper edge of wall. The confine member includes steel plate and U shape steel cover beam. The second category applies horizontal band of carbon fiber, glass fiber, and stainless wire mesh to strengthen the upper edge of the brick wall. The third category uses both of horizontal and vertical bands to strengthen the wall in two directions. Totally, there are 9 brick specimens (215cmx154cmx11cm) are made and tested under statically horizontal load.
According to the experiment, the damage mode of the unreinforced specimen is formed by following stages: (1) a major central vertical crack occurred; (2) two inclined cracks extending from the central crack to the corner of wall specimen; (3) finally, an U-shape crack near the three constrained edges is observed. The specimens strengthened by confine members have shown an increase of 100% for ultimate load. The specimens strengthened by horizontal bands have the increase of 40%~100%, depending on the band materials used. For the specimens strengthened by horizontal bands associated with vertical bands, an ultimate load that increases 90~200% is obtained.

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