Abstract: According to the experimental data of 25 precast-prestressed-compound concrete beams,the author offers the formulas of the inclined cracking shearing force and shearing strength of the beams.They are simple and easy to use.They are in better agreement with the experimental data,preeast-prestressed-compound concrete beams compared with reinforced concrete beams.The inclined cracking shearing force is increased 40%.The shearing strength in general is increased 20-25%.The author also researches into the problem of the problem of the horizontal cracking of the beam's connection and gives the control method of calculation to avoid the horizontal cracking.

摘要： 本文根据25条受集中荷载简支预应力混凝土迭合梁的试验资料,提出其抗裂剪力和抗剪强度计算公式。公式形式简单,应用方便,与试验结果相比符合性较好。公式表明,预应力混凝土迭合梁与钢筋混凝土梁相比,抗裂剪力可提高40%。抗剪强度一般可提高20~25%。本文还研究了预应力混凝土迭合梁结合面的水平裂缝问题,并提出控制的计算方法。