欢迎光临《计算力学学报》官方网站!
考虑塑性变形发展程度系数的RC梁开裂弯矩改进计算公式
An improved formula for cracking moment calculation of RC beams considering the development coefficient of plastic deformations
投稿时间:2018-04-28  修订日期:2018-06-01
DOI:
中文关键词:  RC梁开裂弯矩  混凝土强度  塑性变形发展程度系数  塑性影响系数  改进计算公式
英文关键词:cracking moments of RC beams  concrete strength  plastic deformation development coefficient  influence coefficient of plasticity  improved calculation formula
基金项目:国家自然科学基金面上项目(51578158)
作者单位E-mail
方圣恩 福州大学土木工程学院 shengen.fang@fzu.edu.cn 
张培辉 福州大学土木工程学院  
摘要点击次数: 72
全文下载次数: 
中文摘要:
      针对RC梁开裂荷载计算方法尚未统一的现状,首先结合18根RC梁试验数据对比了已有的6种RC梁开裂弯矩计算公式,发现开裂弯矩理论计算值与试验值的偏差大小和混凝土强度有关;然后通过提出塑性变形发展程度系数k,推导新的RC梁开裂弯矩计算公式,并进一步基于k值和塑性影响系数计算值 进行改进;最后选取7根RC试验梁验证改进公式的准确性,发现改进公式的计算值与试验值吻合更好且偏于安全。
英文摘要:
      In view of the lack of a general method for calculating the cracking loads of RC beams, 6 different formulas for calculating cracking moments were first compared using 18 experimental RC beams. The results showed that the deviations between the calculated and experimental cracking moments were related to the concrete strength. Then a new concept of plastic deformation development coefficient, k, was proposed in order to deduce a new cracking moment formula. The formula was further improved based on k and the influence coefficient of plasticity related to k. The recommended values of k and were given respectively according to the concrete strength. Lastly, 12 experimental RC beams were used to verify the accuracy of the improved formula. It was found that the estimations by the improved formula agreed well with the experimental measurements and showed better safety reservation than the existing formulas.
  查看/发表评论  下载PDF阅读器
您是第4142578位访问者
版权所有:《计算力学学报》编辑部
本系统由 北京勤云科技发展有限公司设计