关键词: 无粘结, 桥梁, 无粘结筋束, 预应力

Abstract: This paper expounds the survey on the applying of the unbonded prestressed concrete technique in China. and it gives some examples of bridges constracted by this technique. These examples make known that this technique can be used in bridge engineering and havs a vast vista. This paper simply recommends the rules of the design and construction of the unbonded prestressed concrete. At the end, it gives the results of experimental research on ultimate shear strength and fatigue strength of the un bonded partially prestressed concrete beams.

Key words: unbond, bridge, unbonded-tendons, prestressed