部分预应力砼受弯构件截面中和轴的简捷计算  

A Simplified Method for Determining Neutral Axis of Partially Prestressed Concrete Beams

作　　者：田秀梅 史玉廷[2] 

机构地区：[1]天津红桥区职工大学,天津300131 [2]河北工业大学土建学院,天津300132

出　　处：《河北工业大学学报》2002年第1期108-110,共3页Journal of Hebei University of Technology

摘　　要：部分预应力砼梁缝宽度计算或疲劳验算以及钢筋砼小偏压构件正截面强度计算，均需求算关于截面受压区相对高度系数 的三次方程．用常用的数学方法一次换元消去ζ２项，给出ζ的精确解．此法不仅可方便的用于工程设计，而且可避免进行复杂的抗裂验算．For evaluating the crack width and checking the fatigue strength of a partially prestressed concrete beam, or calculating the strength of normal section of compression member with small eccentricity. It usually needs to compute the value of of a relative height in the compression region of the section. This paper offers an accurate calculation of by the currently used mathematical method of eliminating term by exchanging el-ement to solve the cubic equation for . it is very convenient for engineering design and avods the complicated crack calculation has been proposed.

关 键 词：预应力砼受弯构件 截面受压区 相对高度系数ζ 

分 类 号：TU311.2[建筑科学—结构工程]