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孙佳星¹ ,  王   珂¹  ,  蔡迎春²

( 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)

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。

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

中图分类号：TU377. 9           

文献标志码：A           

文章编号： 1005- 8249   (2025)  02- 0091- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.016

 

SUN Jiaxing¹  ,  WANG Ke¹  ,  CAI Yingchun²

(1 . Henan Zhongping Jiaoke Research and Design Institute ,  Pingdingshan 467000 ,   China;

2. Water Conservancy and Civil Engineering College ,  Zhengzhou University ,  Zhengzhou 450000 ,   China) 

Abstract : In order to further analyze the seismic performance of concrete members, the formation and mechanical characteristics of the multi-plastic zone of each specimen are discussed by pushover test using the GFRP Bar + reinforcement cascade configuration. Based on the spatial arrangement of GFRP bars and steel bars, the crack propagation law, plastic hinge distribution characteristics and energy dissipation mechanism of GFRP bars and steel bars under load were studied. 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. Therefore, in engineering construction, 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 study 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.

Keywords: GFRP REBAR + rebar configuration; concrete member; pushover test; multi-plastic zone; formation mechanism; mechanical properties; seismic performance

基金项目：2021 河南省科技攻关项目 (212102310289) 。

作者简介：孙佳星  (1987—) ,  男 ，本科 ，高级工程师 ，研究方向：公路路面设计 、桥梁 、景观设计。

通信作者：蔡迎春  (1971 —) ,  男 ，博士 ，教授 ，研究方向： 交通基础设施安全防护理论与技术研究等。

收稿日期：2024 - 12 - 08