Abstract: Based on the test result of 35 boams this paper analyses the influence of the degree of prestress and shear span-depthratio on the anti-cracking capacity of inclined section of beams.on the hasis of the analysis of theory and stUdy of test,a formula for the anti-cracking shaer of P.P.C beam with unbended tendons is proposed, simple and aucurate.

Key words: unbonded tendon, inclined section, anti-cracking, shaer span-depth ratio, degree of prestress

摘要： 笔者依据35片梁的试验资料,着重分析了剪跨比,预应力度对梁斜截面抗裂剪力的影响,在理论分析和数据统计的基础上,提出了一个无粘结P.P.C梁斜截面抗裂剪力的计算公式,公式具有概念清晰,形式简单的特点,并且有一定精度,可为工程设计和进一步的研究提供参考.

关键词: 无粘结, 斜截面, 抗裂, 剪跨比, 预应力度