王强, 胡兆杰, 朱万旭,等.预应力CFRP布和高强灌浆料修复加固严重震损装配式柱地震损伤模型研究[J].河南理工大学学报（自然科学版）,2026,45(5):177-187.

WANG Q, HU Z J, ZHU W X,et al.Seismic damage modeling of prefabricated columns strengthened with prestressed CFRP strips and high-strength grout after severe earthquake damage[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(5):177-187.

预应力CFRP布和高强灌浆料修复加固严重震损装配式柱地震损伤模型研究

王强1,2, 胡兆杰2, 朱万旭1,2, 卢春玲1,2

1.桂林理工大学 广西绿色建材与建筑工业化重点实验室， 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:目的为量化评估地震作用下严重震损的建筑在紧急修复后经历二次震损的损伤状态，进行预应力碳纤维增强聚合物（carbon fiber reinforced polymer， CFRP）布和高强灌浆料修复加固严重震损装配式柱地震损伤模型研究。  方法以轴压比和纵筋直径为变量，设计制作装配式钢筋混凝土方柱。先对试件进行循环往复荷载试验模拟达到严重震损状态，再使用预应力碳纤维增强聚合物和高强灌浆料修复加固严重震损状态柱并进行拟静力试验。结合现有模型理论与试验结果，采用重构混凝土强度和折减箍筋弹性模量方法，提出一种适用于预应力CFRP布和高强灌浆料修复加固严重震损装配式柱的双参数地震损伤模型，并对试件的主要设计参数进行非线性回归分析，得出组合系数表达式，根据模型和试件损伤程度进行损伤量化分析。  结果结果表明：轴压比固定时，损伤指标随纵筋直径增大而减小。纵筋直径固定时，损伤指标随轴压比增大而减小。本文模型计算的损伤指标［0.8，1.0］，较好地体现了预应力CFRP布修复严重震损构件的损伤演化规律。根据本文模型和试验结果，重新划定5个损伤等级，并给定各个等级的损伤指标界限值。  结论研究结果为使用预应力CFRP布和高强灌浆料修复加固装配式柱在地震作用下的损伤评估提供了理论支撑。

关键词:装配式柱;预应力CFRP布;震损修复;初始损伤;地震损伤模型

doi:10.16186/j.cnki.1673-9787.2024030049

基金项目:国家自然科学基金资助项目（52068014）；广西自然科学基金资助项目（2023GXNSFAA026337）

收稿日期:2024/03/18

修回日期:2024/06/11

出版日期:2026-07-24

Seismic damage modeling of prefabricated columns strengthened with prestressed CFRP strips and high-strength grout after severe earthquake damage

Wang Qiang1,2, Hu Zhaojie2, Zhu Wanxu1,2, Lu Chunling1,2

1.Guangxi Key Laboratory of Green Building Materials and Construction Industrialization， Guilin University of Technology， Guilin  541004， Guangxi， China；2.School of Civil Engineering， Guilin University of Technology， Guilin  541004， Guangxi， China

Abstract: Objectives To quantitatively evaluate the damage state of prefabricated columns subjected to secondary seismic damage after emergency repair under earthquake actions， a seismic damage model for prefabricated reinforced concrete columns strengthened with prestressed carbon fiber-reinforced polymer （CFRP） strips and high-strength grout is developed.  Methods Four prefabricated reinforced concrete square columns were designed with axial compression ratio and longitudinal reinforcement diameter as variables. Cyclic loading tests were conducted to simulate severe seismic damage states. The damaged concrete was removed， and the columns were subsequently repaired and strengthened using prestressed CFRP strips and high-strength grout， followed by quasi-static tests. Based on existing theoretical models and experimental results， a dual-parameter seismic damage model was proposed by introducing reconstructed concrete strength and reduced shear reinforcement elastic modulus. Nonlinear regression analysis was performed on key design parameters to obtain the expression of combination coefficients， and damage quantification was carried out based on the proposed model.  Results The results show that， under a constant axial compression ratio， the damage index decreases with increasing longitudinal reinforcement diameter. Conversely， under a constant longitudinal reinforcement diameter， the damage index decreases with increasing axial compression ratio. Existing models generally yield damage indices either greater than 1.0 or lower than 0.8 for repaired columns， failing to accurately describe the damage evolution process. In contrast， the proposed model yields damage indices ranging from 0.8 to 1.0， which better reflects the damage evolution behavior of severely earthquake-damaged prefabricated columns repaired with prestressed CFRP strips.  Conclusions The proposed model effectively captures the seismic damage evolution behavior of repaired prefabricated columns under earthquake loading. Based on the model and experimental results， five damage levels are redefined with corresponding threshold values of the damage index， providing a theoretical basis for seismic damage assessment of prefabricated structural members after severe earthquake damage.

Key words:prefabricated reinforced concrete columns;prestressed CFRP strips;seismic damage repair;initial damage state;seismic damage model