GFRP带肋筋黏结性能试验研究与简化本构模型

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中图分类号：TU528.572 文献标志码：A 文章编号：2096-6717（2025）06-0123-10

Abstract：To investigate the bond performance between glassfiber reinforced polymer（GFRP）ribbed bars and concrete and improve the practicality of existing constitutive models，14 sets of specimens were prepared for beam-end tests，which aimed to explore the influences of concrete strength，thickness of cover， stirup configuration and the interaction between GFRP ribbed bars on the bond performance. The tests were conducted using displacement-controlled loading; loading force，free end slip value，and loading end slip value were recorded，the failure mode of the bond interface was observed，and a method for proposing a simplified bond-slip constitutive model was proposed based on the test results.The results showed that the beam-end tests mainly resulted in pul-out and spliting failures;the slip value of the bond-slip curve was related to the rib spacing，and the peak spacing was essentially consistent with the rib spacing；concrete strength and configuration of stirups would afect the failure mode and damage degree of the bond interface，thereby affecting bond-slip performance；the increase in cover thickness hada beneficial efect on thebond-slip performance within a certain range;the results of the second pul-out test showed that there was a mutual influence on the bond performance of the GFRP ribbed bars in the specimens.The simplified bond-slip constitutive modelcanaccurately fit the test data and further enhance the practicalityof the constitutive model.

Keywords： ribbed bars；beam-end test；bond-slip behavior;bond-slip constitutive model

纤维增强复合材料（fiberreinforcedpolymer，FRP）筋已在海港工程、岛礁建设、无磁建筑等中得到了应用1，并取得了良好的社会效益。（剩余12732字）