混凝土三轴等幅拉-压疲劳性能试验研究

O3; Fatigue tests were conducted on tapered plain concrete prism specimens under triaxial constant-amplitude tension-compression cyclic loading. The low stress of the cyclic loading was taken as 0.2fc and the upper stress ranged from 0.20ft to 0.65ft. Three constant lateral pressures were 0.1fc, 0.2...

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Bibliographic Details
Published in上海大学学报(英文版) Vol. 9; no. 2; pp. 127 - 133
Main Authors 宋玉普, 曹伟, 孟宪宏
Format Journal Article
LanguageChinese
Published State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, P.R. China%Dongguan Civil Engineering Quality Supervision Office, Dongguan 523067, P.R. China 2005
Subjects
concrete
fatigue strength
triaxial constant-amplitude tension-compression cyclic loading
fatigue life
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ISSN1007-6417

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Summary:O3; Fatigue tests were conducted on tapered plain concrete prism specimens under triaxial constant-amplitude tension-compression cyclic loading. The low stress of the cyclic loading was taken as 0.2fc and the upper stress ranged from 0.20ft to 0.65ft. Three constant lateral pressures were 0.1fc, 0.2fc and 0.3fc respectively. Based on the results, the three-stage evolution rule of the fatigue stiffness, maximum(minimum) longitudinal strain and damage were analyzed, and a unified S-N curve to calculate fatigue strength factors was worked out. The results show that the fatigue strength and fatigue life under triaxial constant-amplitude tension-compression cyclic loading are smaller than those under uniaxial fatigue condition. Moreover, the secondary strain creep rate is related to the fatigue life, a formula for describing their relation was derived. The investigation of this paper can provide information for the fatigue design of concrete structures.
ISSN:1007-6417