双轴对称截面FRP轴心受压杆件整体屈曲临界力计算方法分析  

ANALYSIS OF CALCULATION METHOD OF CRITICAL LOADS FOR GLOBAL BUCKLING OF AXIALLY LOADED FRP MEMBERS WITH DOUBLY SYMMETRIC CROSS SECTIONS

作　　者：詹瑒[1,2] 李奔奔 崔璟 杨亚强 ZHAN Yang;LI Ben-ben;CUI Jing;YANG Ya-qiang(Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing 210096,China;School of Civil Engineering and Architecture,Nanjing Institute of Technology,Nanjing 211167,China;College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096 [2]南京工程学院建筑工程学院,南京211167 [3]南京工业大学土木工程学院,南京211816 [4]河南工业大学土木工程学院,郑州450001 [5]江苏科技大学土木工程与建筑学院,镇江212003

出　　处：《复合材料科学与工程》2021年第6期58-64,共7页Composites Science and Engineering

基　　金：国家自然科学基金(51708259,51808265);东南大学混凝土及预应力混凝土结构教育部重点实验室开放课题基金(CPCSME2018-08,CPCSME2019-04)。

摘　　要：本文通过对1969年至2020年相关文献的收集与挑选,建立了包含132根双轴对称截面FRP轴压杆件整体屈曲失效试验数据的数据库,并以此数据库为依据,考察了目前用于预测FRP轴心受压杆件整体屈曲临界力的5种方法(经典欧拉公式、Engesser和Haringx修正公式、Strongwell与Fiberline公司建议公式)的预测精度及性能。结果显示:经典欧拉公式高估了FRP杆件整体屈曲临界力约16.7%,平均绝对误差约为18.1%;由于考虑了剪切变形的影响,Engesser和Haringx修正公式的预测精度明显高于欧拉公式,分别高估了FRP杆件整体屈曲临界力约8.4%和9.5%,相应的平均绝对误差分别约为11.3%和12.0%;Fiberline公司建议公式低估了FRP杆件整体屈曲临界力约12.5%,平均绝对误差约为14.3%;Strongwell公司建议公式高估了FRP杆件整体屈曲临界力约118.2%,且平均绝对误差高达118.2%。根据预测性能及精度,推荐使用Engesser修正公式预测双轴对称截面FRP轴压杆件整体屈曲临界力。This paper presents a test database of concentric compression experiments on fiber-reinforced polymer(FRP)specimens with doubly symmetric cross sections that failed in a global buckling mode published in literature between 1969 and 2020.The prediction accuracies of the five closed-form solutions recommended by Euler,Engesser,Haringx,Strongwell and Fiberline corporations which can be used to predict the global buckling loads of FRP members with doubly symmetric cross sections were evaluated according to the test database.The results show that the classical Euler formula overestimates the experimentally obtained capacity by 16.7%,and the average absolute error(AAE)is approximately 18.1%.Because the effect of shear deformation is considered in Engesser and Haringx shear correction formulae,the two solutions overestimates the capacity by only 8.4%and 9.5%,respectively,and the AAE values are approximately 11.3%and 12.0%,respectively.The formula recommended by Fiberline Composites underestimates the experimentally measured capacity by 12.5%,and the AAE is approximately 14.3%.The formula recommended by Strongwell Corporation significantly overestimates the experimentally obtained capacity by 118.2%,and the AAE is approximately 118.2%.Considering the prediction accuracy,the Engesser shear correction formula is recommended to be used to predict the global buckling loads of FRP members with doubly symmetric cross sections.

关 键 词：双轴对称截面FRP杆件 整体屈曲 临界力 预测精度 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]