河南理工大学学报（自然科学版）2026，Vol.45Issue(3)：163-170,8.DOI:10.16186/j.cnki.1673-9787.2024020015
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
Numerical study on progressive collapse resistance of GFRP-reinforced RC beam-slab substructures under corner column removal
摘要
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 re-moval 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 us-ing 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 perfor-mance.Conclusions Optimizing the arrangement of GFRP bars can effectively enhance the progressive col-lapse resistance of RC beam-slab substructures.The findings provide useful references for structural strengthening design in engineering practice.关键词
连续倒塌/角柱失效/RC梁板子结构/GFRP加固/FEMKey words
progressive collapse/corner column removal/RC beam-slab substructure/GFRP reinforce-ment/finite element method分类
建筑与水利引用本文复制引用
李治,刘旺相,石裕焕,林睿文,邓炼,胡海宁..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):163-170,8.基金项目
国家自然科学基金资助项目(52308489) （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) （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) （2023KY1142）
广西研究生教育创新计划项目(YCSW2022309) （YCSW2022309）
