Shear mansfer across a definjte interface must 廿equently be considered in the desigri of precast con ete connections . As the fbnowing various resistances in thc ef 陀cting shear transfer slrengh are given : ( 1 ) Dowel action ofjoint steel bars , ( 2)Sbear 」 key resistance , ( 3) Friction Witl1 aXial force , ( 4 )Adherence on the concrete surface . The pu耳 x )se of this paper is to reveal the compou 皿 d ef龍 cts ofthe various resjstance elements , Basic experimentS on the interface shear

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... at the precast concrete connections ware canied out . Fi fteen panel type specimens with the same dimcnsions were tested . As a cenc [ usion , the relation of the shear transfer mechanism and shear displacement behaviour in concrete connection is clarified . And the evaluation equatiQn of the shear u sfα strength with consideration to 出 e shcar displacement Gon 丘 )mity is propQsed . Keyw ・ rds ' P ・ ec ・st c ・nc ・ete c ・nnecti ・ ns , ・d・ we -