| 混凝土三轴等幅拉-压疲劳性能试验研究 |
| |
| 引用本文： | 宋玉普,曹伟,孟宪宏.混凝土三轴等幅拉-压疲劳性能试验研究[J].上海大学学报(英文版),2005,9(2):127-133. |
| |
| 作者姓名： | 宋玉普 曹伟 孟宪宏 |
| |
| 作者单位： | [1]StateKeyLaboratoryofCoastalandOffshoreEngineering,DalianUniversityofTechnology,Dalian116023,P.R.China [2]DongguanCivilEngineeringQualitySupervisionOffice,Dongguan523067,P.R.China |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant No.50078010) |
| |
| 摘 要： | 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 nile of the fatigue stiffness, maximttm(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.
|
| 关 键 词： | 疲劳特征 混凝土 疲劳强度 循环荷载 使用寿命 |
| 收稿时间： | 7 July 2003 |
Fatigue properties of plain concrete under triaxial constant-amplitude tension-compression cyclic loading |
| |
| Song?Yu-pu,Cao?Wei,Meng?Xian-hong.Fatigue properties of plain concrete under triaxial constant-amplitude tension-compression cyclic loading[J].Journal of Shanghai University(English Edition),2005,9(2):127-133. |
| |
| Authors: | Song Yu-pu Cao Wei Meng Xian-hong |
| |
| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, P.R. China
2. Dongguan Civil Engineering Quality Supervision Office, Dongguan 523067, P.R. China |
| |
| Abstract: | Fatigue tests were conducted on tapered plain concrete prism specimens under tri axial constant-amplitude tension-compression cyclic loading. The low stress of the cyclic loading was taken as 0.2f c and the upper stress ranged from 0. 20f t to 0.65f t. Three constant lateral pressures were 0.1f c, 0.2f c and 0.3f c respec tively. Based on the results, the th ree-stage evolution rule of the fatigue stiffness, maximum(minimum) longitudina l strain and damage were analyzed, and a unified S-N curve to calculate fati gue strength factors was worked out. The results show that the fatigue strength and fa tigue life under triaxial constant-amplitude tension-compression cyclic loadin g are smaller than those under uniaxial fatigue condition. Moreover, the secondary strain creep rate is related to the fatigue life, a formula for describing thei r relation was derived. The investigation of this paper can provide information for the fatigue design of concrete structures. |
| |
| Keywords: | concrete triaxial constant-amplitude tension-compression cyclic loading fati gue strength fatigue life |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
