TRECC复合约束混凝土柱轴压力学性能模型分析  

Model Analysis of Axial Compressive Mechanical Properties of Concrete Column Constrained by Textile-Reinforced Engineered Cementitious Composites

作　　者：马高 王朝阳 MA Gao;WANG Zhaoyang(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China;Hunan Provincial Key Laboratory on Damage Diagnosis for Engineering Structures(Hunan University),Changsha,Hunan 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南大学工程结构损伤诊断湖南省重点实验室,湖南长沙410082

出　　处：《中外公路》2025年第1期109-118,共10页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:51878268);湖南省自然科学基金资助项目(编号:2020JJ4195)。

摘　　要：为避免纤维编织网增强混凝土(TRC)中存在的基体开裂问题,由纤维编织网和高性能水泥基材料(ECC)组成的网格布增强ECC(TRECC)复合加固方法被提出,然而国内外对TRECC约束混凝土的轴压力学性能研究还不充分,缺少可靠的强度和极限应变分析模型。该文收集116个TRC约束混凝土柱轴压试验结果和125个TRECC复合约束柱轴压试验结果,比较TRECC和TRC约束混凝土的约束机理和破坏模式,提出TRECC和TRC约束混凝土的强度和极限应变模型;考虑纵筋和箍筋对约束柱力学性能的贡献,提出TRECC约束钢筋混凝土柱的强度和极限应变模型;为方便实际应用,针对不同网格布类型分别提出相应的强度和极限应变模型。与试验结果的对比分析表明:模型具有良好的预测精度。In order to avoid the problem of matrix cracking in textile-reinforced concrete(TRC),a reinforcement method of textile-reinforced engineered cementitious composites(ECC),namely TRECC composed of textile and high-performance ECC was proposed.However,the research on the axial compressive mechanical properties of TRECC-constrained concrete in China and abroad is still insufficient,and there is a lack of reliable strength and ultimate strain analysis models.A total of 116 axial compression test results of TRC-constrained concrete columns and 125 axial compression test results of TRECC-constrained concrete columns were collected.The confinement mechanisms and failure modes of TRECC and TRC-constrained concrete were compared.Then,the strength models and ultimate strain models of TRECC and TRC-constrained concrete were proposed.By taking into account the contributions of longitudinal and hoop reinforcement to the mechanical properties of the columns,the strength model and ultimate strain model for TRECC-constrained reinforced concrete columns were proposed.For the convenience of practical applications,strength and ultimate strain models were proposed for different types of mesh fabrics.The comparative analysis with the experimental results shows that the models have good prediction accuracy.

关 键 词：纤维编织网增强混凝土(TRC) 水泥基复合材料(ECC) 强度模型 极限应变模型 

分 类 号：U441[建筑科学—桥梁与隧道工程]