摘要
重点考虑收缩和徐变等因素,对再生混凝土梁的时变挠度进行了理论分析。假定收缩和徐变不会相互影响,通过截面时随分析,得到再生混凝土梁时变相对受压区高度表达式。依据现有文献的试验数据,对分析结果准确性进行了验证。结果表明:对于不同的再生粗骨料取代率,时变挠度的计算结果与试验结果相比,大多数误差可控制在19%以内。该文的工作较好揭示了再生混凝土梁时变挠度的演化特点,可以为今后再生混凝土梁的长期挠度预测提供理论基础。
Considering the shrinkage and creep characteristics of recycled aggregate concrete（RAC）, the time-dependent deflection of recycled concrete beams was analyzed. The influence of shrinkage and creep was taken into consideration separately. Through cross-sectional time-dependent analysis, the expression of time-varying relative compressive zone was established. Based on experimental data from published literature, the accuracy of analysis results was verified. The results showed that most of the errors were within 19% regardless of the value of replacement ratio of recycled coarse aggregate. This study shows the characteristics of time-dependent deflection of recycled concrete beams and provides an alternative theoretical basis for the prediction of long-term deflection of concrete beams.
作者
肖建庄
郑世同
XIAO Jian-zhuang ZHENG Shi-tong(Department of Structural Engineering, Tongji University, Shanghai 200092, Chin)
出处
《工程力学》
EI
CSCD
北大核心
2017年第4期57-62,共6页
Engineering Mechanics
基金
国家杰出青年科学基金项目(51325802)
关键词
再生混凝土梁
时变挠度
基于龄期调整的有效模量法
收缩
龄期系数
徐变
recycled aggregate concrete beams
time-dependent deflection
age-adjusted effective modulus method
shrinkage
aging coefficient
creep
