摘要
本文进行了18根部分预应力煤矸石混凝土梁及1根非预应力煤矸石混凝土梁的试验,研究分析在使用阶段,不同配筋率,不同预应力度对梁刚度的影响根据煤矸石混凝土应力应变曲线的特点,提出了正常使用极限状态下部分预应力煤矸石混凝土梁的短期刚度公式,计算值与试验值符合良好。
Presented in this paper are the experimental test results conducted on 18 partially prestressed gangue concrete beams and a nonprestressed onc. The effect of reinforcement ratio and prestress ratio on flexural rigidity of beams undler servioe loads is inrestigated. Based on the behavior of stress—strain curves of gangue concrete,a formula for estimating stiffness of partially prestressed gangue concrete barns under short—term loading has been proposed. Calculated deflections are in good agrcement with the measured results.
