4. A bridge beam of a 0.4%C steel is subjected to fully reversed cyclic stresses from freight rail traffic loads. Each train induces a cyclic stress amplitude on the beam of 400 MPa, and 20 trains cross the bridge each day. Using the S-N curve below and Miner's rule, what is the percent damage of the beam after 10 years? How many total years will it take for the beam to be 90% damaged?

4. A bridge beam of a 0.4%C steel is subjected to fully reversed cyclic stresses from freight rail traffic loads. Each train induces a cyclic stress amplitude on the beam of 400 MPa, and 20 trains cross the bridge each day. Using the S-N curve below and Miner's rule, what is the percent damage of the beam after 10 years? How many total years will it take for the beam to be 90% damaged?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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