摘要
在分析钢管混凝土构件受弯极限状态时钢管和混凝土受力特征的基础上,建立了截面的内力平衡方程,推导了新的抗弯承载力计算公式,并给出了相关的计算图表。对国内外70个受弯试件的数据进行分析,结果表明,提出公式的计算值与试验值之比的平均值为0.933,均方差为0.098,可见计算结果与试验结果吻合良好,且略偏于安全,可以用来计算圆钢管混凝土构件的抗弯承载力。
The internal force equilibrium equations of a typical concrete-filled steel tube （CFST） section are established based on analysis of the behaviors of steel tube and concrete in bending ultimate state. A new formula is presented to predict the ultimate flexural capacity of CFST and correlative charts are provided for calculating conveniently. The test results and predicted results of 70 bending specimens are analyzed and it shows that the average ratio of predicted-to-test results is 0. 933, and the standard deviation is 0. 098. It can be concluded that the calculated results obtained from the proposed method agree well with the test results, and the calculated results are little conservative. Therefore, the new formula can be used to calculate ultimate flexural capacity of CFST.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第17期96-98,共3页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50808039)
江苏省自然科学基金(BK2008148)
关键词
钢管混凝土
纯弯
承载力
concrete-filled circular steel tube
pure bending
bearing capacity
