GFRP筋+钢筋配置对混凝土构件力学性能研究  

Study on the Mechanical Properties of Concrete Members with Hybrid GFRP-Steel Reinforcement

作　　者：孙佳星 王珂 蔡迎春[2] SUN Jiaxing;WANG Ke;CAI Yingchun(Henan Zhongping Jiaoke Research and Design Institute,Pingdingshan 467000,China;Water Conservancy and Civil Engineering College,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]河南中平交科研究设计院有限公司,平顶山467000 [2]郑州大学水利与土木工程学院,郑州450000

出　　处：《粉煤灰综合利用》2025年第2期91-96,共6页Fly Ash Comprehensive Utilization

基　　金：2021河南省科技攻关项目(212102310289)。

摘　　要：通过推覆试验,研究采用GFRP筋+钢筋梯级配置方式的混凝土构件,在荷载作用下的裂缝扩展规律、塑性铰分布特征及耗能机制,探讨GFRP筋+钢筋混凝土构件的抗震性能。结果表明:GFRP筋的高强度与低弹性模量特性结合钢筋的延性优势,可促使构件形成多个可控塑性区,而多塑性区的分级演化有效延缓了结构刚度退化,使构件在强震下呈现稳定的多级屈服机制;通过GFRP筋与钢筋的梯级协同配筋策略,可有效调控混凝土构件多塑性区的形成,合理控制梯级长度和配筋参数,可使梯级GFRP筋+钢筋混凝土构件的抗震性能增加。研究揭示了梯级配筋对混凝土构件力学性能的增强路径,为新型组合结构抗震理论体系的完善提供了重要参考价值。Through pushover tests,this study investigates the crack propagation patterns,plastic hinge distribution characteristics,and energy dissipation mechanisms of concrete members with hybrid GFRP bar-steel bar stepped configurations under load,aiming to explore the seismic performance of GFRP-reinforced concrete composite structures.The results show that the high strength and low elastic modulus characteristics of GFRP bars combined with the ductility advantages of steel bars can promote the formation of multiple controllable plastic zones in the members,and the hierarchical evolution of multiple plastic zones effectively delays the degradation of structural stiffness,the multi-level yield mechanism of the members is stable under strong earthquake.The formation of multiple plastic zones in concrete members can be effectively regulated by the strategy of Cascade cooperative reinforcement of GFRP bars and steel bars,and the length and reinforcement parameters of the cascade can be reasonably controlled,it can increase the seismic performance of the cascade GFRP Bars+reinforced concrete members.This reveals the enhancement path of cascade reinforcement on the mechanical properties of concrete members,and provides an important reference value for the improvement of the seismic theory system of new composite structures.

关 键 词：GFRP筋+钢筋配置 推覆试验 多塑性区 生成机理 力学性能 抗震性能 

分 类 号：TU377.9[建筑科学—结构工程]