基于试验数据分析的FRP筋混凝土梁抗弯承载力预测方法  

Prediction of data-based flexural capacityfor concrete beam reinforced with FRPbar

作　　者：陈万祥 孙航 马建军 彭晓丽 孟凡俊 CHEN Wanxiang;SUN Hang;MA Jianjun;PENG Xiaoli;MENG Fanjun(School of Civil Engineering,Sun Yat-sen University,Zhuhai 519082,China;State Key Laboratory ofDisaster Prevention and Mitigation ofExplosion and Impact,PLA Army Engineering University,Nanjing 210007,China;Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai 519082,China)

机构地区：[1]中山大学土木工程学院,广东珠海519082 [2]陆军工程大学爆炸冲击防灾减灾国家重点实验室,江苏南京210007 [3]南方海洋科学与工程广东省实验室(珠海),广东珠海519082

出　　处：《混凝土》2024年第5期9-14,共6页Concrete

基　　金：江苏省自然科学基金(BK20221530)。

摘　　要：新型纤维增强复合材料(FRP)被视为一种可取代钢筋的理想增强材料,在岛礁及近海工程中得到广泛应用。参照相关规范的参数规定及基本假定,对国内外89根FRP筋混凝土梁的试验数据进行统计分析,引入无量纲化参数μp,建立了一种基于试验数据分析的抗弯承载力预测方法,并与我国现行规范中的计算方法进行对比分析,验证了本文提出预测方法的可靠性和预测精度。结果表明:基于试验数据分析的FRP筋混凝土梁抗弯承载力预测结果与试验结果吻合较好,M_(pre)/M_(exp)平均比值为0.96~1.03,为FRP筋混凝土梁极限承载力评估提供了一种新途径。Fiber Reinforced Polymer(FRP)is regarded as a reinforced material alternative to steel bars widely used in island and offshore engineering.Referring to the parameters and basic assumptions of relevant codes,a new nondimensionalized parameterμp is introduced by measured load-carrying capacity of 89 concrete beams reinforced with FRP,and the data-based flexural capacity of concrete beam rein-forced with FRP is further given.The reliability and prediction accuracy of proposed methods are verified by the results derived by current codes of China.It is indicated that the analytical results based on data analysis are in good agreement with the experimental data.A M_(pre)/M_(exp) ratio ranging from 0.96 to 1.02 is achieved,which provides a new approach to evaluate the ultimate load-carrying capacity of concrete beam reinforced with FRP.

关 键 词：FRP筋 混凝土梁 试验数据分析 极限承载力 预测方法 

分 类 号：TU528.571[建筑科学—建筑技术科学]