FRP-钢复合圆管约束混凝土轴压性能预测模型

科技工作者之家 2019-03-20

《复合材料学报》优先在线发表论文。

 

要:纤维增强聚合物基复合材料(FRP)-钢复合圆管约束混凝土由于具有很好的综合性能,近年来得到了较为广泛的研究,尚缺乏完整的应力-应变关系全曲线计算模型。本文在综合作者现有研究成果的基础上,广泛收集了96个FRP-钢复合圆管约束混凝土柱的轴心受压试验结果,系统分析了试件参数的影响规律,提出了FRP-钢复合圆管约束混凝土的应力-应变关系曲线的完整计算模型,包括峰值应力、峰值应变、极限应力和极限应变的计算方法,并建议了应力-应变关系全曲线预测模型,模型较好地预测了FRP-钢复合圆管约束混凝土的应力-应变关系曲线的特征,预测结果与试验结果吻合较好。建议模型具有较好的通用性和准确性。

 

关键词:纤维增强聚合物基复合材料(FRP);钢管;混凝土;约束;轴心受压;计算模型

 

Abstract:Fiber reinforced polymer (FRP)-steel composite circular tube confined concrete has been studied extensively in recent years due to its excellent comprehensive properties, however, a complete computational model to predict the stress-strain curve is still lacking. On the basis of the author's existing research results, the axial compression test results of 96 FRP-steel composite circular tube confined concrete columns were extensively collected in this paper and the influence rule of specimen parameters was systematically analyzed, a complete calculation model of stress - strain curve of FRP- steel composite circular tube confined concrete was presented, including the calculation methods of peak stress, peak strain, ultimate stress and ultimate strain, and the prediction model of the whole stress-strain curve was proposed. The model can predict the characteristics of the stress-strain curve of FRP-steel composite circular tube confined concrete, and the predicted results are in good agreement with the test results. The proposed model has good universality and accuracy.

 

Keywords: fiber reinforced polymer (FRP); steel tube; concrete; confinement; axial compression; calculation model

 

作者:张依睿等,南京林业大学 土木工程学院,南京

通讯作者:魏洋,南京林业大学 土木工程学院,南京

全文详见中国知网学术期刊优先数字出版。


来源:CSCM_OFFICE 中国复合材料学会

原文链接:https://mp.weixin.qq.com/s?__biz=MjM5MTA2NTk1Nw==&mid=2654409082&idx=3&sn=4feba0faf025fb8086248cc4c9c435db&scene=0#wechat_redirect

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