الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
A proposal for calculating the vertical and lateral accelerations due to the human induced dynamic forces is presented. Also the effect of introducing a tuned mass damper, TMD, with different mass ratios on the footbridges to control the induced accelerations in both directions is presented.
The human induced dynamic forces are represented as a Fourier series. Consequently, researches were concerned with identifying the Fourier coefficients and the phase angle between the used harmonics. For the human induced dynamic loads in the vertical direction, three loading schemes are tested on five simple footbridges with different spans and verified with the results obtained from the BS Standards and the AISC Standards; to determine the most suitable method to simulate the human induced dynamic load in the vertical direction. Two load models for the human induced dynamic loads in the lateral direction are presented: (1) by DaIIard et aI. (2001), (2) by Nakamura et aI. (2006); these models have been studied and Nakamura’s model has been used for simulating the human induced dynamic loads in the lateral direction.
A parametric study for the factors affecting the accelerations induced in the vertical and lateral directions in footbridges is conducted, followed by the proposed method for determining the maximum acceleration in the vertical and lateral directions that can be used for all types of footbridges. Also a general equation computed by nonlinear regression of the studied parameters is presented for calculating the acceleration in both directions.