TIME-DEPENDENT BEHAVIORS OF PRESTRESSED CONCRETE TRACK BEAMS UNDER SUSTAINED LOADS

摘要：

　　Experimental and analytical studies are conducted to investigate time-dependent behaviors of 5 prestressed concrete track girder models (1:5) of urban light rail for 3000 days.The research is carried out with an emphasis on effects of types of concrete,methods of tensioning,stress differences between upper and lower fibers of midspan sections on long-term deflections,strains,curvatures of the midspan sections of the models.Theoretical formula based on the compatibility of strains and equilibrium of forces was presented to predict the long-term deflections of the prestressed concrete beams.In addition,based on the Age-adjusted Effective Modulus Method (AEMM),a step-by-step finite element analysis program was developed to predict the long-term behaviors of prestressed concrete beams.The deflections at midspan predicted by the formulas and the program were compared to the measured responses of the beams tested in the laboratory,with close agreement being observed.

关键词： Prestressed concrete track beam long-term behaviors test theoretical formula time-dependent analysis

作者: Weichen Xue Ting Liu

作者单位: College of Civil Engineering, Tongji University, Shanghai 200092, P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 1012-1017

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）