為避免梁構材於強震作用下先行發生剪力破壞而非撓曲破壞，國內鋼筋混凝土結構設計規範嚴禁梁構材於塑鉸範圍內穿孔，但現今住宅單元小及各項細部施工之複雜性有時迫於該區域內穿孔，然而卻因缺少試驗數據而無明確的設計補強方針遵循，本研究規劃一系列試體，期望透過實驗結果能提供更多參考資訊外也能提供一套明確的梁穿孔之補強方式。
本研究共進行九組反覆載重下之懸臂穿孔梁試驗，以穿孔位置及穿孔補強筋型式為參數，而穿孔補強筋包含U型斜向插筋及雙方型一筆箍。探討鋼筋混凝土梁於塑鉸區穿孔補強後之力學行為及裂縫發展情況，歸納出一套可使用於塑鉸區及非塑鉸區的穿孔補強的新工法，依穿孔位置不同而建議不同補強方式，並參考日本建築學會‧鋼筋混凝土建築物之韌性保證型耐震設計指針（1999）及日本建築學會‧鋼筋混凝土構造計算準則2010及Mansur與Tan之研究提出對於穿孔梁構件之剪力強度計算方式，提供梁在塑鉸區及非塑鉸區穿孔補強後之剪力強度計算及檢核流程。

To prevent beam members from undergoing shear failure first instead of flexural failure or flexure-shear failure under the action of strong earthquakes, it is generally not recommended to make openings within a region extending twice the beam depth from the faces of the support columns toward the central position of the span of the beam, so that beam members can effectively enter the yield state and generate a large amount of deformation in the plastic hinge zone, thereby providing good mechanical behavior for energy dissipation. In recent years, for actual requirements of pipeline configuration, the problems of arranging the openings in the plastic hinge zone of the beam member have been already faced in the design and construction. To solve the problems, it is necessary to establish a set of design guidelines for the retrofit of openings in the plastic hinge zone on the beam.
A total of nine specimens were tested in this study. The main test variables include: (1)opening location, (2)method of retrofitting the openings. All specimens are subjected to cyclic lateral load. We will discuss the crack development and mechanical behavior of reinforced concrete beams with circular openings, and provide the novel retrofitting methods for the beams with circular openings. Refer to the AIJ-1999, AIJ-2010 and Mansur’s[4] study concrete shear strength formula providing the recommended calculation method and inspection process for reinforced concrete beams with circular openings in the plastic hinge area and the non-plastic hinge area.

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