Evaluation of DAF For Steel Truss Railway Bridge Using Experimental and Numerical Approach.

Hashad, Ahmed; El-Hakem, Yasser

doi:10.21608/bfemu.2020.104934

Evaluation of DAF For Steel Truss Railway Bridge Using Experimental and Numerical Approach.

Document Type : Research Studies

Authors

Ahmed Hashad ¹
Yasser El-Hakem ²

¹ Associate Professor, Construction Research Institute, National Water Research Center, Egypt

² Professor, Construction Research Institute, National Water Research Center, Egypt.

10.21608/bfemu.2020.104934

Abstract

This research studies the differences between the real measured Dynamic Amplification Factor (DAF) and the calculated one according to the new Egyptian Standard. One of the arched steel railway bridges in Egypt was subjected to loading capacity evaluation process, during this process a study to evaluate the (DAF) was carried out.
The actual DAF was determined experimentally by using dynamic loading tests that were carried out under the bridge normal operation conditions. The results of the dynamic loading tests were also validated by using numerical models for the bridge and the train loads. The numerical model was calibrated also with the results of the measured bridge dynamic characteristics.
The results obtained from the experiments and from the numerical model were compared to the DAF obtained from the Egyptian standards. The research results indicated that, there is a considerable difference between the two actual values and the Egyptian standard calculated one.

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