SAFETY ANALYSIS OF RIVETED BRIDGES BASED ON FRACTURE MECHANICS

Acta Metall Sin

1997, Vol. 33

Issue (2): 175-186 DOI:

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SAFETY ANALYSIS OF RIVETED BRIDGES BASED ON FRACTURE MECHANICS

W. Dahl and P. Langenberg(Institute of Ferrous Metallurgy; RWTH Aachen; Germany)

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W. Dahl and P. Langenberg(Institute of Ferrous Metallurgy; RWTH Aachen; Germany). SAFETY ANALYSIS OF RIVETED BRIDGES BASED ON FRACTURE MECHANICS. Acta Metall Sin, 1997, 33(2): 175-186.

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Abstract A simplified method of safety analysis of riveted bridges based on fracture mechanics is presented in this paper First a new formula for the calculation of the fracture load of a brjdge member with an assumed crack. has been derived from new FEM-calculations.Second. a population of more than 400 experimental strength and fracture mechanic values derived from material taken from riveted bridges build between 1890 and 1930has been evaluated statistically to derive characteristic distributions as a basis for the material input data of the fracture mechanic concept. Third, large scale tests with oldbridge plates using the plane plate geometries described above bearing artificially pro-duced cracks have been carried out to verify the proposed method by comparing pre-dicted with experimental results. Fourth the new formula has been applied for modern structural steels with yield strength from 350 t0 890 MPa and large scale tests per-formed on the large sale testing machine at the Institute of Ferrous Metallurgy in sever-al research projects have re-evaluated to find out the quality of this approach.

Key words: fracture mechanics finite element simulation safety of riveted bridge

Received: 18 February 1997

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1997/V33/I2/175

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