混凝土受弯构件受拉钢筋最小配筋率
屈文俊，方 瑾，周国全
(同济大学土木工程学院，上海200092)
摘要：简述了中国不同时期的混凝土设计规范对非抗震情况和抗震情况下受拉钢筋最小配筋率的
取值及确定原则，同时对比分析了各国混凝土设计规范中2种情况下混凝土受弯构件受拉钢筋最
小配筋率的规定及确定方法；通过实例对各国规范的最小配筋率取值进行了比较，建议了最小配筋
率的确定原则。结果表明：各国规范多以“截面开裂后，构件不致立即失效”为确定最小配筋率的原
则，但对非抗震构件所取的最小配筋率相差较大，对抗震区最小配筋率的取值，除中国规范偏低外，
其他国家规范大体相当。
关键词：钢筋混凝土；受弯构件；受拉钢筋；最小配筋率；抗震框架梁
中图分类号：TU352．1 文献标志码：A
M inimum Reinforeement Ratio of Tensile Reinforcement for
Concrete Flexural M embers
QU Wen_jun，FANG
(School of Civil Engineering，Tongji
Jin，ZHOU Guo—quan
University，Shanghai 200092，China)
Abstract：Authors simply analyzed the minimum reinforcement ratio and its determination
principles under the non-seismic—resistance and seismic—resistance situations，which were referred
to the Chinese concrete design codes in different periods． Meanwhile， the values and
determinations of the minimum reinforcement ratio of tensile reinforcement for concrete flexural
m embers under two circum stances were comparative analyzed． Limiting values of the minimum
reinforcement ratios in different codes were compared through an example，and the method tO
determine the m inimum reinforcem ent ratios was suggested． The results show that the concrete
design codes of different countries described “the member is not failure immediately after
cracking”as the principle tO determine the minimum reinforcement ratio．There is a big difference
on the minimum reinforcement ratio for non—seismic—resistance member in each code， but for
seism ic-resistance area， the reinforcement ratio is quite similar in each code， except that the
reinforcement ratio in Chinese code iS lower than the others．
Key words：reinforced concrete；flexural mem ber；tensile reinforcem ent；minimum reinforcem ent
ratio；seismie frame beam
0 引 言
钢筋混凝土受弯构件的最小配筋率取值是一个
比较复杂的问题。目前世界各国钢筋混凝土受弯构
件受拉钢筋最小配筋率的取值方法基本上有2种：
模型法和经验法。模型法是指截面受拉区混凝土开

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