摘要
受弯混凝土构件进行抗裂计算时，将受拉区的应力分布曲线图简化成矩形图。但用于锥形截面时，所得抗裂弯矩系数γｍ值偏大，本文将受拉区的矩形应力计算图改进成梯形应力计算图。能适用各种不同形状的截面确定γｍ值。现行规范ＧＢＪ１０—８９规定的γｍ值有限，采用本方法可求得尚未规定的γｍ值。
The stress distribution curve diagram in the tensile area is used to be simplified into a rectangular one when the crock resistance of the concret member in bending was being calculated. The rectanguler stress diagram is not suitable to the taper section and the crack resistance moment coefficient γm is greater than the normal one. This paper suggests that the rectangular stress diagram be improved into a trapezoidal stress diagram. The coefficient γm undecided of code GBJ10-89 can be obtained with the method suggested in this paper.
出处
《兰州铁道学院学报》
1994年第4期27-34,共8页
Journal of Lanzhou Railway University
关键词
抗裂计算
开裂弯矩
截面开裂
混凝土
crock resistance calculation
cracking moment
crock resistance moment coefficient
