摘要
通过84根尺寸为100mm×100mm×400mm的高强混凝土、钢纤维高强混凝土、聚丙烯纤维高强混凝土试件在剪切荷载作用下的抗剪试验,研究了纤维类型和纤维体积率(掺量)对高强混凝土抗剪强度及在剪切荷载作用下变形性能的影响。结果表明,纤维的加入有效地改善了高强混凝土的抗剪强度及变形性能。初裂抗剪强度和变形、极限抗剪强度和变形以及抗剪韧性均随纤维体积率(掺量)的增加而增大,试件破坏时能保持完整性。根据试验结果,建立了钢纤维高强混凝土及聚丙烯纤维高强混凝土抗剪性能的剪力传递模型和数学表达式。
Through the experiments on 84 plain and fiber reinforced high strength concrete specimens with dimensions of 100mm×100mm×400 mm under direct shear, the influences of fibers with various types and various fiber volume fractions on shear strength and deformation properties of high strength concrete were studied. It is indicated from the test results that the addition of fibers into concrete leads to improvement on the properties of shear strength and deformations of high strength concrete efficiently, first cracking shear strength and relevant deformation, ultimate shear strength and relevant deformation, and shear ductility have been enhanced with the increasing addition of the fibers. Moreover, the specimens with fibers can keep integrity after failure. Based on the test results, shear transfer models of steel fiber reinforced high strength concrete and polypropylene fiber reinforced high strength concrete are established and corresponding formulations are put forward.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2004年第6期88-92,98,共6页
Journal of Building Structures
基金
国家自然科学基金资助项目(59479001)
