Abstract: Based on 38 shear tests of Partially prestressed concrete beams, this paper discusses the main influence factors and advances a new calculated model of diagonal crack width. The model with simple form and wide applicability includes numerous influence factors. It may be valuable to continual study in this subject.

Key words: diagonal crack, anti-cracking strength, shear strength, degree of ptestressi, stirrup content

摘要： 本文分析和讨论了影响部分预应力混凝土(以下以P.P.C.代之)梁斜裂缝开展的各主要因素,并根据38次P.P.C.梁的抗剪试验实测资料,提出了一个斜裂缝宽度的计算公式,该公式以简单的形式综合考虑了影响斜缝开展的主要因素,具有较广泛的适用性,可供本课题的继续研究参考。

关键词: 斜裂缝, 抗裂剪力, 破坏剪力, 预应力度, 配箍率