钢筋混凝土偏心受压柱徐变分析
- 摘 要
-
（1 北京市建筑工程研究院有限责任公司，北京100039；2 国家知识产权局专利局专利审查协作北京中心，北京 100190；3 北京航空航天大学，北京 100191）[摘要] 基于弹性徐变理论，研究了对称配筋的钢筋混凝土偏心受压柱中，钢筋和混凝土的应力-应变增量关系和递推公式；采用数值方法计算了考虑加、卸载后钢筋和混凝土应力-应变的变化过程；分析了偏心距、配筋率、加载龄期及卸载时间等因素对长期荷载下钢筋混凝土偏心受压柱徐变特性和卸载后混凝土应力的影响规律。[关键词] 钢筋混凝土; 偏心受压柱; 混凝土徐变; 卸载中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2013)S2-0532-04作者简介：张宇鹏，硕士，中级工程师，国家一级注册结构工程师，国家一级注册建造师， Email：29815435@qq.com。Creep analysis of reinforced concrete eccentric compression columnsZhang Yupeng1, Cao Yan2, Huang Dahai3(1 Beijing Building Construction Research Institute, Beijing 100039; 2 Patent Examination Cooperation Center of the Patent Office, SIPO, Beijing 100190; 3 Beihang University, Beijing 100191, China)Abstract: Based on the elastic-creep theory, this paper analyses the relationship of stress-strain increment and recurrence formula of reinforcement and concrete in reinforced concrete eccentric compression columns. The stress-strain changing process considering repeated loading is calculated through numerical method. The effects of long-time loading on creep behavior of RC eccentric compression columns and concrete stress after unloading is studied. Many factors are considered in the study, that include the eccentricity, the reinforcement ratio, the age of concrete at loading, and the duration of loading.Keywords: reinforced concrete; eccentric compression columns; concrete creep; unload
