土木工程与管理学报2023，Vol.40Issue(6)：1-8,8.DOI:10.13579/j.cnki.2095-0985.2023.20230068
钢-PVA混杂纤维高性能混凝土隧道衬砌管片抗弯性能试验
Flexural Behavior Test of Steel-PVA Hybrid Fiber High Performance Concrete Tunnel Lining Segments
摘要
Abstract
In order to study the effects of steel fiber,polyvinyl alcohol(PVA)fiber and mineral pow-der on the force performance of hybrid fiber high performance concrete tunnel lining segments,with different volume fractions of steel fiber(0.5％,1.0％,1.5％),PVA fiber(0.1％,0.2％,0.3％)and different blending amounts of mineral powder(10％,20％,30％),L9(33)orthogonal test was de-signed,and one piece of reinforced concrete(RC)lining segment and nine pieces of steel-PVA hy-brid fiber high performance concrete lining segments were made to test the flexural performance.The results show that compared with RC lining segment,steel-PVA hybrid fibers could significantly im-prove the cracking bending moment of lining segments,the bending moment corresponding to the crack width of 0.2 mm,the yield bending moment,the ultimate bending moment and the control abil-ity of crack development of the lining segments,among them,the steel fiber has the most significant improvement on the ultimate bending moment of the lining segments,with the maximum improvement up to 64.0％,followed by mineral powder and PVA fiber.The optimal combination of the three factors was determined as 1.5％steel fiber,0.3％PVA fiber and 20％mineral powder.To provide theoretical and experimental basis for the selection principle of steel-PVA hybrid fiber concrete and its applica-tion in lining segments.关键词
钢-PVA混杂纤维/高性能混凝土/隧道衬砌管片/正交试验Key words
steel-PVA hybrid fiber/high performance concrete/tunnel lining segment/orthogonal test分类
建筑与水利引用本文复制引用
许成祥,曾光辉,许奇琦,肖良丽..钢-PVA混杂纤维高性能混凝土隧道衬砌管片抗弯性能试验[J].土木工程与管理学报,2023,40(6):1-8,8.基金项目
湖北省高等学校优秀中青年科技创新团队计划项目(T2022002) （T2022002）
