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Remaining strength evaluation method of plate girders with corrosion near supports |
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| รหัสดีโอไอ | |
| Title | Remaining strength evaluation method of plate girders with corrosion near supports |
| Creator | Naoyuki Asao, Katashi Fujii, Hiroaki Fukuda, Ryuichi Yokota |
| Contributor | - |
| Publisher | ISEC PRESS |
| Publication Year | 2559 |
| Keyword | Shear strength, Local corrosion, Local buckling, Web, Vertical stiffener, Peeling |
| Abstract | In Japan, a lot of steel railway bridges were constructed during the period of rapid economic growth in the 1960s. Now, since over 50 years have passed, the aging of these structures has become conspicuous and a major social problem. In particular, for steel plate girders with open deck system, deterioration and damage due to corrosion is becoming obvious. However, the remaining strength evaluation method of corroded structures is not always sufficient. Therefore the purpose of this study is to propose the analytically-based evaluation method for the maintenance of steel railway bridges. Then the following remarks can be listed based on the results from this study.1) Regarding the shearing strength of plate girders with corrosion near supports, the remaining strength depends on the corroded surface condition of each component such as a web or a vertical stiffener. Furthermore, according to the form and degree of corrosion, the fracture mode also changes from the buckling of web to the buckling of cross-shape column consisting of the web and vertical stiffener. Then the result shows that the corroded web has more effect on the shearing strength than the vertical stiffener.2) Regarding the flaking between the web and bottom flange due to corrosion, the remaining strength is deteriorated more rapidly than above case 1), when the flaking range lengthens more than the sole plate area. |
| ISBN | 978-0-9960437-3-1 |
