混凝土受弯构件受拉钢筋最小配筋率  

Minimum Reinforcement Ratio of Tensile Reinforcement for Concrete Flexural Members

作　　者：屈文俊[1] 方瑾[1] 周国全[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《建筑科学与工程学报》2011年第1期6-10,共5页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50678127)

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。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 members under two circumstances were comparative analyzed.Limiting values of the minimum reinforcement ratios in different codes were compared through an example,and the method to determine the minimum reinforcement 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 seismic-resistance area,the reinforcement ratio is quite similar in each code,except that the reinforcement ratio in Chinese code is lower than the others.

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 

分 类 号：TU352.1[建筑科学—结构工程]