配置高强钢筋混凝土梁抗弯刚度的研究

A Research on Stiffness of Concrete Members Reinforced by High Strength Rebars

随着高强钢筋的使用,混凝土梁的变形计算和控制显得更为重要.为了研究配置HRB500级高强钢筋混凝土梁的变形性能,对28根配置500MPa钢筋的混凝土梁进行了受弯刚度试验和分析,研究结果表明,现行国家混凝土规范GB 50010-2002刚度计算公式和作者提出公式与试验值吻合较好,适用于配置高强钢筋的混凝土梁变形计算.结合本次试验数据,对国内各规范的刚度计算方法进行了比较研究,并对影响刚度的主要因素进行了分析,提出了刚度计算公式进一步简化的建议.

With the use of high strength reinforcement,it seems more important to control and calculate the deformation of reinforcement beams.28 RC beams with 500MPa steel were tested and analyzed,in order to study their deformation properties.The results showed that the stiffness formula of current national standard GB 50010-2002 and formula proposed by author were in good agreement with the experimental data,and applicable to the deform calculation of beams with high stress rebars.Based on the experimental data,some domestic standard stiffness calculation methods were compared each other,the main factors that affect stiffness were analyzed,and the proposal of further simplify Stiffness formula was given.