基于改进Drucker-Prager准则的GFRP管约束高强混凝土短柱单轴压缩分析模型  

Theuniaxial compression analysis model of high-strength concrete constrained by GFRP tubes based on improved Drucker-Prager criterion

作　　者：王磊佳 祝明桥 董嘉睿[2] WANG Leijia;ZHU Mingqiao;DONG Jiarui(School of Mechanical Engineering,Hunan University of Science and Technology,411201 Xiangtan,China;School of Civil Engineering,Hunan Engineering Research Center for Intelligently Prefabricate Passive House,Hunan University of Science and Technology,411201 Xiangtan,China)

机构地区：[1]湖南科技大学机电工程学院,湘潭411201 [2]湖南科技大学土木工程学院湖南省智慧建造装配式被动房工程技术研究中心,湘潭411201

出　　处：《应用力学学报》2023年第2期397-404,共8页Chinese Journal of Applied Mechanics

基　　金：湖南省自然科学基金资助项目(No.2020JJ4313);湖南省重点实验室开放基金资助项目(No.19K033)。

摘　　要：针对玻璃纤维增强聚合物(glass fiber reinforced polymer, GFRP)管约束高强混凝土短柱的受力特点,及传统Drucker-Prager (D-P)准则存在拉剪区偏大的问题,提出了一种改进的D-P型塑性约束高强混凝土短柱单轴压缩分析模型,其考虑GFRP管约束效应相关的混凝土硬化/软化规律和非关联流动准则,以提高GFRP管约束高强混凝土短柱单轴压缩下轴向和环向应力-应变曲线的预测精度。该模型在ANSYS软件中实现了GFRP管约束高强混凝土短柱力学性能的计算模拟,并与试验结果的对比表明:两者的应力-应变曲线吻合较好,提出的分析模型合理可靠。此研究可为GFRP管约束高强混凝土的设计提供理论参考。In view of the glass fiber reinforced polymer(GFRP)tube loading characteristics of high strength concrete short column and the large shear zone of the traditional Drucker-Prager rule,this paper puts forward an improved Drucker-Prager type plastic constraint model of high strength concrete.In order to improve the prediction accuracy of axial and circumferential stress-strain curves under uniaxial compression of high-strength concrete short columns constrained by GFRP tubes,concrete hardening/softening criteria and uncorrelated flow criteria were considered.The new model was used in ANSYS software to simulate the mechanical properties of high-strength concrete short columns constrained by GFRP tubes.The comparison between the finite element analysis results and the test results shows that the stress-strain curves of the two columns are in good agreement with the structural failure mode,and the proposed model is reasonable and reliable.This study can provide theoretical reference for the design of FRP tube confined high strength concrete.

关 键 词：约束混凝土 GFRP管 DP塑性准则 轴心受压 有限元分析 

分 类 号：TU318[建筑科学—结构工程] TU312