钢-聚丙烯混杂纤维混凝土压力管道有限元分析  

Finite Element Analysis of Steel-Polypropylene Hybrid Fiber Concrete Penstock

作　　者：何山 吴海林[1] 司东东 HE Shan;WU Hailin;SI Dongdong(College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang 443000,China)

机构地区：[1]三峡大学水利与环境学院

出　　处：《人民珠江》2020年第2期124-128,共5页Pearl River

基　　金：国家自然科学基金(51879146)

摘　　要：为改善钢衬钢筋混凝土压力管道的承载性能,保证管道的安全性和耐久性,考虑在压力管道外包混凝土中掺入混杂纤维来进行混凝土裂缝控制。钢纤维体积掺量为0.5%、1.0%、1.5%3个等级,聚丙烯纤维体积掺量为0.05%、0.10%、0.15%3个等级,进行钢纤维和聚丙烯纤维混杂组合,采用混凝土塑性损伤模型,在有限元软件ABAQUS中模拟钢-聚丙烯混杂纤维混凝土压力管道在内水压力作用下外包混凝土的损伤过程。结果表明:钢-聚丙烯混杂纤维的掺入不仅能够限制压力管道外包混凝土裂缝的开展,降低管道的开裂荷载,钢材的应力值也随着混杂纤维体积率的增加而减少。In order to improve the bearing capacity of steel-lined reinforced concrete penstock and ensure the safety and durability of the penstock,it is planned to mix hybrid fibers into the wrapped concrete of penstock for crack control.The steel fiber volume fraction is 0.5%,1.0%,1.5%,and the polypropylene fiber volume fraction is 0.05%,0.10%,0.15%.After mixing the steel fiber and polypropylene fiber,this paper simulates the damage process of steel-polypropylene hybrid fiber concrete penstock under internal water pressure through ABAQUS(as a finite element software)by the plastic damage model of concrete.The results show that the mixture of steel-polypropylene hybrid fiber can not only limit the crack development on wrapped concrete of penstock,but also reduce the crack load of penstock,and the stress of the steel also decreases with the increase of the volume fraction of the hybrid fiber.

关 键 词：钢衬钢筋混凝土管道 钢-聚丙烯纤维混凝土 有限元分析 裂缝 

分 类 号：TV335[水利工程—水工结构工程]