Based on the test results of 14 unbonded partially prestressed con crete beams, the distribution and development of the cracks and the stress of the unbonded bars of the beams are investigated under service load.

• 本文通过14根无粘结部分预应力混凝土梁的试验,探讨了在使用阶段允许出现裂缝的无粘结部分预应力混凝土梁的裂缝分布和开展以及无粘结预应力钢筋应力的变化规律。