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基于弹性应变能的钢筋混凝土简支梁极限承载力判据研究

《应用力学学报》[ISSN:1000-4939/CN:61-1112/O3]

期数:
2019年02期
页码:
485-491
栏目:
出版日期:
2018-12-18

文章信息/Info

Title:
Ultimate bearing capacity criterion of reinforced concrete beam based on elastic strain energy
作者:
夏雨胡淼珍聂宏涛张泽俊
广西科技大学 土木建筑工程学院 545006 柳州
Author(s):
Xia Yu Hu Miaozhen Nie Hongtao Zhang Zejun
Civil Engineering and Architecture College, Guangxi University of Science and Technology, 545006, Liuzhou, China
关键词:
钢筋混凝土简支梁弹性应变能概率分布极限承载力判据
分类号:
TU313.3
DOI:
10.11776/cjam.36.02.B001
文献标识码:
A
摘要:
基于弹性应变能提出了钢筋混凝土简支梁极限承载力的能量判别依据。首先对简支梁进行了有限元建模计算;然后对简支梁9种工况下的混凝土单元弹性应变能进行了概率统计分析,由加载过程中弹性应变能的概率分布形式及变化情况来分析混凝土单元的破坏,从整体趋势上计算极限承载力,降低了数值计算时的误差。研究发现:混凝土单元应变能符合对数正态分布,且随着加载过程逐渐趋于稳定,较客观地反映了构件变形过程中能量积累的特征;应变能对数正态分布拟合参数的变化较符合二次曲线,由二次曲线方程能够推断出构件所能承受的极限荷载,与理论值相比有较高的一致性,其误差为13.6%,且此误差可通过改进模型得到控制。文中所提的判据可为极限承载力判据的研究提供参考。

参考文献/References

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