中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 1997, Vol. 16 ›› Issue (2): 13-20.

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部分预应力砼梁、钢筋砼小偏心受压构件中和轴高度计算的几种简便方法及比较

杨丽梅   

  1. 重庆交通学院桥梁及结构工程系 630074
  • 收稿日期:1996-05-07 出版日期:1997-04-21 发布日期:2016-11-14
  • 作者简介:杨丽梅,女,1964年生,讲师

Some Simplified Calculation Methods and the Comparison for Determining Neutral Axis of Partially Pretressed Concrete Beams and Compression Members with Small Eccentricity

Yang Limei   

  1. Department of Bridge and Structure Engineering
  • Received:1996-05-07 Online:1997-04-21 Published:2016-11-14

摘要: 根据公路桥涵设计规范JTJ023-85,推导了部分预应力砼梁B类构件在计算使用荷载下开裂截面应力时求中和轴位置的一般三次方程,及钢筋砼小偏心受压构件计算中,求受压区高度的一般三次方程.分析了3种解三次方程的简便计算方法,并根据例题进行了分析比较,可供工程技术人员参考.

关键词: 中性轴, 比较, 简化

Abstract: According to Standard (JTJ023-85)of road、bridge and culvert, the beams of the kind of B of partially pretressed concrete and the compression members with small eccentricity, this paper gives the general equations of calculating the value of ξ of a relative height in the com pression reign of the section.And it gives different formulas of the coefficient of these equations.This paper also offers three kinds of simplified approaches by which a cubic equation approximated by aquadratic equqation with acceptable accuracy is proposed.Through examples these simplified methods are analysed and compared.

Key words: neutral-axis, comparison, simplified