CFRP约束地质聚合物混凝土轴向应力-应变关系  

Axial stress-strain behavior of CFRP-confined geopolymer concrete

作　　者：周华飞 洪恒达 谢子令 董鑫熠[1] ZHOU Huafei;HONG Hengda;XIE Ziling;DONG Xinyi(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Zhejiang Key Laboratory of Civil Engineering Structures&Disaster Prevention and Mitigation Technology(Zhejiang University of Technology),Hangzhou 310023,China;College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China;Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province(Wenzhou University),Wenzhou 325035,China)

机构地区：[1]浙江工业大学土木工程学院,杭州310023 [2]浙江省工程结构与防灾减灾技术研究重点实验室(浙江工业大学),杭州310023 [3]温州大学建筑工程学院,温州325035 [4]浙江省软弱土地基与海涂围垦工程技术重点实验室(温州大学),温州325035

出　　处：《复合材料学报》2024年第1期414-425,共12页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52278320);浙江省自然科学基金(LGF21E080010)。

摘　　要：为了探究地质聚合物混凝土(GPC)在多轴应力状态下的应力-应变关系,开展了碳纤维增强树脂复合材料(CFRP)约束GPC圆柱的轴压试验,揭示了GPC在不同约束条件下的应力-应变曲线特征,据此建立了完整的轴向应力-应变模型、抗压强度模型和极限轴向压应变模型,特别是针对CFRP约束普通强度GPC,提出了新的模型参数表达式,并利用文献试验结果予以验证。结果表明:抗压强度模型具有良好的预测能力,预测值的平均绝对误差为3.55%;极限轴向压应变模型也能较精准地对其他研究的试验结果做出预测,预测值的平均绝对误差为17.03%。新的轴向应力-应变模型参数表达式不仅适用于CFRP约束高强GPC也适用于CFRP约束普通强度GPC。To investigate the stress-strain behavior of geopolymer concrete(GPC)under multi-axial stress states,axial compression tests were conducted on GPC columns with and without carbon fiber reinforced polymer(CFRP)confinement.The characteristics of stress-strain curves for GPC under various confinement conditions were examined,and models for axial stress-strain,compressive strength,and ultimate axial compressive strain were established.Specifically,novel expressions for model parameters were proposed for CFRP-confined normal strength GPC,and the model was validated using experimental results from other studies.The results demonstrate that the compressive strength model has good predictive capability,with an average absolute error of 3.55%.Additionally,the ultimate axial compressive strain model accurately predicts experimental results from other studies,with an average absolute error of 17.03%.The newly proposed parameter expressions for the axial stress-strain model are applicable not only to CFRP-confined high-strength GPC but also to CFRP-confined normal strength GPC.

关 键 词：地质聚合物混凝土 纤维增强复合材料 应力-应变模型 极限状态 被动约束 

分 类 号：TU528.41[建筑科学—建筑技术科学] TB332[一般工业技术—材料科学与工程]