首页|基于数据库的玻璃纤维增强复合材料箍筋弯拉强度计算方法

基于数据库的玻璃纤维增强复合材料箍筋弯拉强度计算方法

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玻璃纤维增强复合材料箍筋弯拉强度试验主要研究弯折半径与直径之比对弯拉强度的影响,直线段抗拉强度对弯拉强度的影响研究较少.本文基于ACI 440.3R-12 中B.5 试验方法,开展 3 组(9 个弯拉试件)不同直线段抗拉强度的玻璃纤维增强复合材料箍筋弯拉强度试验研究.3 组试件直线段抗拉强度分别为 530(A组)、850(B组)和 1 100 MPa(C组),弯折半径与箍筋直径之比均为 3.试验结果表明:所有试件均发生玻璃纤维增强复合材料箍筋弯折段被拉断的破坏模式;A、B、C组试件弯拉强度分别为 325、445 和 530 MPa.本文系统收集了国内外已有 93 个弯拉试件,并结合本文 9 个弯拉试件建立了玻璃纤维增强复合材料箍筋弯拉强度试验数据库.基于数据库统计分析,提出了保证率不小于 95%的玻璃纤维增强复合材料箍筋弯拉强度计算方法.
Calculation method of the flexural tensile strength of the glass fiber-reinforced polymer stirrup based on the database
Tests for the flexural tensile strength of glass fiber-reinforced polymer(GFRP)stirrups mainly concen-trate on the impact of the ratio of the bending radius to the diameter on the flexural tensile strength of GFRP stir-rups.However,the influence of the tensile strength of the straight portion on the flexural tensile strength of GFRP stirrups has seldom been studied.In this study,three groups(nine specimens in total)with different tensile strengths of the straight portion were examined to investigate the flexural tensile strength of GFRP stirrups using the B.5 test method from ACI 440.3R-12.The tensile strengths of the straight portion were 530 MPa for group A,850 MPa for group B,and 1 100 MPa for group C,and the ratio of the bending radius to the stirrup diameter was 3.The findings revealed that GFRP stirrups ruptured at the bending portion in all specimens.The flexural tensile strengths of the specimens of groups A,B,and C were 325,445,and 530 MPa,respectively.Moreover,a data-base was established with 93 systematically collected specimens in the literature at home and abroad and 9 speci-mens for testing of the flexural tensile strength.A method of calculating the flexural tensile strength of GFRP stir-rups with a guaranteed rate of more than 95%was proposed based on the statistical analysis of the database.

glass fiber-reinforced polymer(GFRP)stirrupflexural tensile strength of GFRP stirruptensile strength of straight portionbend radiustest for the flexural tensile strength of GFRP stirrupdatabaseguarantee ratecalculation method

白浩阳、薛伟辰、江佳斐

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同济大学 土木工程学院, 上海 200092

玻璃纤维增强复合材料箍筋 玻璃纤维增强复合材料箍筋弯拉强度 直线段抗拉强度 弯折半径 玻璃纤维增强复合材料箍筋弯拉强度试验 数据库 保证率 计算方法

非金属材料创新中心创新基金项目

2023TDA4-1

2024

10.11990/jheu.202304017

哈尔滨工程大学学报
哈尔滨工程大学

哈尔滨工程大学学报

CSTPCD北大核心
影响因子：0.655
ISSN：1006-7043
年,卷(期)：2024.45(2)
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