SIMPLIFIED CALCULATION FOR THE STIFFNESS OF R.C.SIMPLE-SUPPORTED CRACKED BEAMS UNDER UNIFORM LOADS

摘要：

　　The calculating to get the curve of bending moment-curvature of the reinforced concrete beam section is programmed.Using the program,the cracking moment,yield moment,ultimate moment and the corresponding curvatures respectively of R.C.beam sections with different concrete strength,size and reinforcement ratio are obtained.Based on the three group of values obtained,the curve of bending moment-curvature is simplified into a triple line.Section stiffness is varied along the axis of the beam after cracking,that is,the cracked R.C.beam can be treated as a non-uniform beam.According to the equivalent principle of the bending strain energy between uniform beams and non-uniform beams,the equivalent stiffness of non-uniform beams is obtained.The simplified calculation formula,drawn form calculation results,for the stiffness of the R.C.simple-supported beam under uniform loads is given.

关键词： Reinforced concrete simple-supported beams stiffness simplified calculation

作者: Wangxi Zhang Zhiming Yang Xiaoan Xie Weijian Yi Yan Xiao

作者单位: College of Civil Engineering, Hunan University, Changsha 410082, P.R.China College of Civil Engineering, Hunan University, Changsha 410082, P.R.China ; Department of Civil Eng

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: 907-912

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）