摘要
拱坝由于具有优良的力学性能和造价的经济性,使得拱坝特别是高拱坝在我国水电工程中得以大量应用.拱坝因为体型复杂,除温度外,坝体的自重和水荷载也能在拱坝坝体内引起相当大的拉应力,因此提高拱坝混凝土的抗裂能力是人们十分关注的问题.由于PVA纤维具有极高的弹性模量,良好的韧性和阻裂性等优点,将PVA纤维掺入高拱坝混凝土中可以提高其抗裂性能,从而改善拱坝混凝土的耐久性,提高拱坝混凝土的耐久寿命.
As a result of arch dam with excellent mechanical properties and lower cost, the arch dam, especially high arch dam is widely applied to hydropower projects in China. Because of complicated shape of arch dam, except for temperature, self-weight and wa- ter pressure can also cause considerable tensile stress in dam body. Therefore, to improve the crack resistance ability of arch dam con- crete is of great concern to the people. Because of PVA fiber with high elastic modulus, good toughness and crack resistance ability, the PVA fiber is mixed into high arch dam concrete can enhance its crack resistance, which would improve the durability and durability life of arch dam concrete.
出处
《华北水利水电学院学报》
2012年第6期112-115,共4页
North China Institute of Water Conservancy and Hydroelectric Power
关键词
水工材料
PVA纤维
高拱坝
抗裂性能
耐久寿命
hydraulic material
PVA fiber
high arch dam
crack resistance
durability life
