FATIGUE STRENGTH OF PRESTRESSING STEELS
| 项目名称： | FATIGUE STRENGTH OF PRESTRESSING STEELS |
| 摘要： | THE INFLUENCE OF TIME ON THE FATIGUE STRENGTH OF PRESTRESSING WIRES CONSTANTLY UNDER STRESS WAS DETERMINED BY MEANS OF TESTS ON WIRES REMOVED FROM VARIOUS STRUCTURAL ELEMENTS OF DIFFERENT AGES, AND ON WIRES WHICH HAD BEEN SUBJECTED TO A STRESS OF ABOUT 0.60 BETA (Z) FOR ONE AND A HALF YEARS. THE RESULTS OF THE TESTS SHOW THAT, FOR THE COMMERCIALLY AVAILABLE TYPES OF PRESTRESSING WIRE, GIVEN MAXIMUM STRESS IN THE REGION OF THE PERMISSIBLE STRESS UNDER A CONTINUOUS LOADING IN THE REGION OF THE PERMISSIBLE STRESS, THERE IS NO DECREASE IN FATIGUE STRENGTH UNLESS THE PRESTRESSING WIRES ARE DAMAGED BY FAIRLY MARKED CORROSION OR MECHANICAL IMPAIRMENT. |
| 状态： | Completed |
| 资助组织： | DEUTSCHER AUSSCHUSS FUER STAHLBETON (GERMAN REINFORCED CONCRETE COMMITTEE) |
| 项目负责人： | KUPFER, H |
| 执行机构： | TECHNISCHE UNIV. MUENCHEN, INST. FUER MASSIVBAU (TECHNICAL UNIVERSITY OF MUNICH, INST. FOR MASSIVE CONSTRUCTION) |
| 开始时间： | 19690207 |
| 实际结束时间： | 19710000 |
| 主题领域： | Research；I34: Steels and Metals |
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