福州大学学报（自然科学版）2025，Vol.53Issue(2)：210-217,8.DOI:10.7631/issn.1000-2243.24130
采用PE-ECC的钢混组合梁负弯矩区受力性能试验
Experimental study on the stress performance of steel-concrete composite beam with PE-ECC in negative moment zone
摘要
Abstract
Through the scaled-down design of the real bridge,two steel-mixed combination girder members were tested for flexural stress performance under negative moments,and the bearing capacity of the test girder deck slabs,cracks,strains of the girder sections,and reinforcement strains were analyzed in order to investigate the stress and damage patterns of the combination girder members.The test results show that the ultimate bearing capacity of the steel-concrete composite beam with engineered cementitious composite(ECC)is slightly higher than that of the ordinary steel-concrete composite beam under the action of negative bending moment.Under the same condition of longitudinal reinforcement,the polyethylene(PE)fiber contained in the bridge deck of the steel-concrete compos-ite beam using ECC can exert a tensile effect,increase the ultimate stress level of the tensile zone of the composite beam,and improve its flexural bearing capacity.The use of PE-ECC as the bridge deck material can not only effectively control the occurrence of cracks under the action of negative bending moment,but also delay the development of crack width,improve the overall durability and safety of the bridge deck,and strengthen its crack resistance.关键词
PE-ECC/钢-混组合梁/负弯矩/模型试验Key words
PE-ECC/steel-concrete composite beam/negative moment/model test分类
建筑与水利引用本文复制引用
许莉,花鹏,张晓毅,杨明清,侯思远..采用PE-ECC的钢混组合梁负弯矩区受力性能试验[J].福州大学学报（自然科学版）,2025,53(2):210-217,8.基金项目
福建省科技厅引导性基金资助项目(2024H0007) （2024H0007）
