【摘要】 根据线性徐变的迭加原理,引入平均龄期影响系数和平均持荷影响系数,利用AC I规范中的徐变和收缩计算公式,推导了钢筋混凝土轴压构件分批加载时收缩徐变分析的简化计算方法.该法可以考虑加载龄期、加载速度、构件厚度、环境相对湿度以及截面配筋率对收缩徐变的影响.算例表明该法简单实用且计算误差较小,可以用于超高层建筑结构设计中估算收缩徐变.更多还原

【Abstract】 Based on the linear creep superposition principle,admiting average loading age coefficient and average time-lasting coefficient,adopting creep and shrinkage calcultion in ACI code,a simplified method of creep and shrinkage analysis in reinforced concrete member bearing multi-times axial forces is presented.Effects on the creep and shinkage of loading-age,loading-rate,member thickness,surroundings relative humidity,and ratio of steel area to concrete area are taken into account.Calculation sample showed that this method is simple and applicable in estimating creep and shrinkage in tall building structural design.更多还原