李治, 刘旺相, 石裕焕,等.角柱失效工况下GFRP筋加固RC梁板子结构抗连续倒塌数值模拟研究[J].河南理工大学学报（自然科学版）,2026,45(3):163-170.

LI Z, LIU W X, SHI Y H, et al.Numerical study on progressive collapse resistance of GFRP-reinforced RC beam-slab substructures under corner column removal[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(3):163-170.

角柱失效工况下GFRP筋加固RC梁板子结构抗连续倒塌数值模拟研究

李治1,2, 刘旺相1,2, 石裕焕2, 林睿文2, 邓炼1, 胡海宁3

1.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；3.广西水利电力职业技术学院，广西 南宁  530023

摘要:目的 为深入研究角柱失效工况下玻璃纤维（glassfibre reinforced plastics， GFRP）筋加固的钢筋混凝土（reinforced concrete， RC）梁板子结构的抗连续倒塌性能，探究GFRP筋的配筋率、直径和布置方式对加固后的RC梁板子结构抗连续倒塌性能的影响规律。  方法 基于角柱失效工况下GFRP筋加固的RC梁板子结构的Pushdown试验建立精细化有限元模型，利用有限元模型对GFRP筋加固后的RC梁板子结构的抗力机制、破坏模态进行分析。  结果 结果表明：GFRP筋配筋率提高0.36%，对应子结构峰值荷载提高9.68%，残余承载力提高49.17%，提高GFRP筋配筋率可有效提高结构承载能力，残余承载能力的提高更显著；GFRP筋配筋率不变时，将其直径从10 mm减至4 mm，子结构峰值荷载提高2.10%，采用较小直径的GFRP筋加固梁板子结构并不能明显提高结构承载力，但可以抑制裂缝宽度；当GFRP筋与角柱失效工况下梁板子结构失效线正交布置时，GFRP筋使用量为GFRP筋与边梁平行加固方式60%时，可得到和GFRP筋与边梁平行加固方式相近的加固效果，GFRP筋使用量和GFRP筋与边梁平行加固方式相同时，子结构峰值荷载提高了6.03%，GFRP筋沿着失效线正交方向布置加固效果更好。  结论 改善GFRP筋的加固方式可有效提高RC梁板子结构的抗连续倒塌性能，研究结果可为结构加固等实际工程提供参考。

关键词:连续倒塌;角柱失效;RC梁板子结构;GFRP加固;FEM

doi:10.16186/j.cnki.1673-9787.2024020015

基金项目:国家自然科学基金资助项目（52308489）；广西建筑新能源与节能重点实验室开放基金资助项目（桂科能22-21-5）；广西高校中青年教师科研基础能力提升项目（2023KY1142）；广西研究生教育创新计划项目（YCSW2022309）

收稿日期:2024/02/22

修回日期:2024/04/30

出版日期:2026/04/28

Numerical study on progressive collapse resistance of GFRP-reinforced RC beam-slab substructures under corner column removal

Li Zhi1,2, Liu Wangxiang1,2, Shi Yuhuan2, Lin Ruiwen2, Deng Lian1, Hu Haining3

1.Guangxi Key Laboratory of Green Building Materials and Construction Industrialization， Guilin  541004， Guangxi， China；2.College of Civil Engineering， Guilin University of Technology， Guilin  541004， Guangxi， China；3.Guangxi College of Water Resources and Electric Power， Nanning  530023， Guangxi， China

Abstract: Objectives To investigate the progressive collapse resistance of reinforced concrete （RC） beam-slab substructures strengthened with glass fiber reinforced polymer （GFRP） bars under a corner column removal scenario， and to evaluate the effects of reinforcement ratio， bar diameter， and arrangement of GFRP bars.  Methods A refined finite element （FE） model was developed based on pushdown tests of GFRP-reinforced RC beam-slab substructures. The load-resisting mechanisms and failure modes were analyzed using the proposed model.  Results The results indicate that increasing the GFRP reinforcement ratio by 0.36% leads to a 9.68% increase in peak load and a 49.17% increase in residual load-carrying capacity， demonstrating a more pronounced improvement in residual capacity. When the reinforcement ratio remains constant， reducing the bar diameter from 10 mm to 4 mm increases the peak load by 2.10%. Although the increase in load capacity is limited， smaller-diameter bars effectively reduce crack width. When GFRP bars are arranged perpendicular to the failure line， a comparable strengthening effect can be achieved with only 60% of the material used in the parallel arrangement. With the same amount of GFRP bars， the peak load increases by 6.03%， indicating that the perpendicular arrangement provides better strengthening performance.  Conclusions Optimizing the arrangement of GFRP bars can effectively enhance the progressive collapse resistance of RC beam-slab substructures. The findings provide useful references for structural strengthening design in engineering practice.

Key words:progressive collapse;corner column removal;RC beam-slab substructure;GFRP reinforcement;finite element method