部分预应力混凝土梁抗剪强度的分析与计算

Analysis and Determination of the Shear Strength of PPC Beams

本文对影响部分预应力混凝土梁抗剪强度的几个主要因素:预应力度;剪跨比;混凝土抗拉强度;纵向配筋率;配箍率;上翼缘宽度等进行了分析,并依据国内外部分试验资料,提出了部分预应力混凝土抗剪强度的计算公式,与试验结果比较,有令人满意的吻合性及较好的适用性,可供工程设计参考。

Based on the test data in literatures, the effects of the factors, such as the prestressing degree, the shear span ratio, the tensile strength of concrete, the longitudinal reinforcement ratio, the web reinforcement ratio, and the upper flange width, on the shear strength of PPC beams are studied, and by using the mean square regression, a formula for computing the shear strength of PPC beams is suggested. Compared with the test data, the calculated result has the accuracy predicted.