赵军,谌李平,姚敦敏,等.钢筋连接用套筒灌浆料受压本构关系研究[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787. （ 2024070042  ）..

ZHAO J, SHEN L P, YAO D M, et al． Study on compressive constitutive relation of sleeve grouting material for steel bar connection[J]. Journal of Henan Polytechnic University( Natural Science) ， doi: 10.16186/j.cnki.1673-9787. （ 2024070042  ）..

钢筋连接用套筒灌浆料受压本构关系研究(网络首发)

赵军1，谌李平1，姚敦敏1，刘其舟2

1.桂林电子科技大学 建筑与交通工程学院，广西 桂林 541004；2.桂林理工大学 土木工程学院，广西 桂林 541004

摘要: 目的 为了探究钢筋连接所用套筒灌浆料的抗压特性及其受压行为随龄期变化的规律及其受压本构关系。方法 针对不同龄期和形状的灌浆料试块进行了抗压试验及有限元分析。结果结果表明：标准试块在龄期为3天时，其强度已经达到了28天强度的70%，而圆柱体试块在相同龄期下的强度则达到了28天强度的63%。可见无论是标准试块还是圆柱体试块，其3天内的强度增长极为迅速。然而，随着龄期从3天增加到28天，试样的强度增长速度明显减缓，最终强度相比3天时仅提升约30%。通过轴心受压试验得到的应力-应变曲线能很好地反映灌浆料随龄期增长的应力-应变关系，峰值应力与标准试块的强度之间存在显著的差异，而弹性模量则随着龄期的增加而逐渐增大。同时，峰值应变在灌浆料的早期阶段增长尤为迅速。基于实测的应力-应变值，建立了灌浆料的拟合本构与统计损伤本构模型。使用有限元软件对所建立的本构模型进行了模拟分析。模拟结果（荷载-位移曲线、峰值应力以及灌浆料内部的损伤分布情况等）与实际试验结果高度吻合，从而验证了所建立本构模型的可行性和可靠性。结论 通过试验揭示了套筒灌浆料抗压性能随龄期变化的规律，并通过构建并验证可靠的本构模型，为灌浆料在钢筋连接工程中的设计、数值模拟、应用与优化提供了重要的理论基础与实践指导。

关键词:套筒灌浆料；抗压强度；本构模型；应力-应变曲线；有限元分析

doi: 10.16186/j.cnki.1673-9787. （ 2024070042  ）

基金项目:国家自然科学基金资助项目（52368014）；广西研究生教育创新计划项目（YCSW2024330）

收稿日期：2027-07-09

修回日期：2024-08-29

网络首发日期：2026-06-05

Study on compressive constitutive relation of sleeve grouting material for steel bar connection (Online)

Zhao Jun1，Shen Liping1，Yao Dunmin1，Liu Qizhou2

1. School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China ; 2. College of Civil Engineering, Guilin university of technology, Guilin 541004, China

Abstract: Objectives To explore the compressive properties of sleeve grouting materials used in steel bar connections, the law of changes in their compressive behavior with age, and their compressive constitutive relationship. Methods Compression tests and finite element analysis were carried out on grouting material specimens of different ages and shapes. Results The results show that the strength of the standard test block at the age of 3 days has reached 70% of the strength of 28 days. The strength of the cylindrical specimens at the same age reached 63% of the 28-day strength. It can be seen that the strength of both the standard test block and the cylindrical test block increases extremely rapidly within 3 days. However, as the age increased from 3 days to 28 days, the strength growth rate of the specimens slowed down significantly, and the final strength only increased by about 30% compared to 3 days. The stress-strain curve obtained through the axial compression test can well reflect the stress-strain relationship of the grouting material as it ages. There is a significant difference between the peak stress and the strength of the standard test block. The elastic modulus gradually increases with age. Meanwhile, the peak strain increases particularly rapidly in the early stage of the grouting material. Based on the measured stress-strain values, the fitting constitutive and statistical damage constitutive models of the grouting material were established. The established constitutive model was simulated and analyzed using finite element software. The simulation results (load-displacement curve, peak stress, and damage distribution inside the grouting material, etc.) are highly consistent with the actual test results, thus verifying the feasibility and reliability of the established constitutive model. Conclusion The experiment revealed the law of the change of the compressive properties of sleeve grouting materials with age.And by constructing and verifying reliable constitutive models, it provides important theoretical foundation and practical guidance for the design, numerical simulation, application and optimization of grouting materials in steel bar connection projects.

Key words: sleeve grouting material; compressive strength; constitutive model; stress-strain curve; finite element simulation