摘要
混凝土徐变对组合梁内力的影响与钢筋混凝土梁不同,表现为混凝土在徐变发展过程中,要受到钢梁约束的影响,导致混凝土本身变形与在相同温度和湿度等外界条件下的钢筋混凝土梁不同.笔者制作了一片钢筋混凝土组合梁进行徐变加载试验,通过最小二乘法修正了在一定的温度和湿度下,考虑受钢梁约束作用的混凝土板的徐变度;然后根据有效模量法通过在一定时域内的叠加计算,得到组合梁中混凝土板的徐变系数;最后通过与钢筋混凝土梁的计算对比,得出了混凝土徐变变形对连续组合梁次内力的影响特点.
The influence of creep on composite steel- concrete beam is different with it on concrete beam,that the development of creep restrained from the steel beam is different with the concrete beam on the same condition. The author manufactured one composite steel - concrete beam and started payload experimenting for modifying creep degree with the retrain of steel beam at the certain temperature and humidity ,then deduced creep modulus based on the age-adjusted effective modulus method in the certain time with superimposed calculating, at last obtained the stress quality of continuous composite beam on contrast of concrete beam.
出处
《吉林建筑工程学院学报》
CAS
2008年第4期25-27,共3页
Journal of Jilin Architectural and Civil Engineering
关键词
混凝土徐交
徐变庹
连续组合梁
次内力
concrete creep
creep degree
continuous composite beam
secondary stress
