本實驗採用三支因不同部位配筋缺失而產生剪力破壞之抗彎構架試體進行RC擴柱補強，實驗補強試體主要針對於各原型試體柱與接頭配筋的缺失來進行補強設計，一根採用針對接頭的部份擴柱補強，另兩根採用全柱式的擴柱補強，其中補強試體之原型試體均已產生不同等級之破壞。藉此研究，瞭解各試體補強後對整體構架的耐震成效，以及觀察新舊混凝土交界面的滑移對補強效果的影響。 由實驗結果顯示，非韌性梁柱內接頭經由混凝土擴柱工法作補強，其強度、勁度及能量消散能力方面皆能夠得到很大的提升。對部份擴柱補強的部份，雖然強度與勁度的表現不若全柱式擴柱補強，但在韌性有表現明顯增大。三根試體皆發現有微量新舊混凝土交界面滑移，但對整體構架的耐震成效並不造成影響。 Three RC moment-resisting frames were retrofitted by RC Jacketing, in which had different poor reinforcement to cause different shear failure modes. Three retrofitted specimens were designed according to their failure modes. One of the specimens was jacketed in joint part, and another two specimens were jacketed through whole columns. This study is to know the seismic effect of moment-resisting frames retrofitted with RC jacketing, and to observe the influence of the new-to-old concrete interfacial bond slip on the overall seismic performance of frames. From the test results, it was found that the retrofitted specimens performed well in seismic strength, stiffness, and energy dissipation. The retrofitted frame with partial jacketing behaved as similar to frames with whole jacketing, except for strength and ductility. The partial jacketing frame presented lower strength but higher ductility than the whole jacketing frames. Though the new-to-old concrete interfacial slip of jacketing joint was observed with a small amount, the overall seismic performance was not affected.