Amirkabir University of Technology AUT Journal of Civil Engineering 2588-2899 4 4 2020 12 01 Dynamic Analysis of Suspension Footbridges under Human-induced Vibrations and Near-field Earthquakes–Soti Ghat Bridge in Nepal 505 516 3681 10.22060/ajce.2019.16842.5604 EN Bahram Samadi Department of Civil Engineering, Faculty of Engineering, Urmia University, Urmia, Iran Gholamreza Zamani Ahari Department of Civil Engineering, Faculty of Engineering, Urmia University, Urmia, Iran 0000-0001-7228-8769 Journal Article 2019 07 28 <strong>Suspension footbridges are mainly under the influence of pedestrians' loads. In addition to the forces caused by pedestrians during the structure's lifetime, natural forces such as wind and earthquake also affect these structures. The effects of wind force on the suspension bridges are generally considered in the design process of the structure due to the high repetition of this phenomenon and lightweight of these structures but the earthquake forces are ignored due to the low probability of occurrence, low mass, and the high flexibility of these structures. This study aimed to investigate the dynamic behavior of suspension footbridges under the influence of the coincidence of pedestrians loading and earthquake forces. The final finding of this study was the impact of the earthquake on the suspension footbridges, which caused a change in the acceleration and forces of the bridge cables. It was found out that the simultaneity of human loading and earthquake forces increases the response of the lateral acceleration of the structure, and this increase is affected by the acceleration of earthquakes. Moreover, the lateral acceleration response of the structure changes during the pedestrians' movement, like the vertical acceleration response, but its amount is small at different speeds and does not cause any difficulty in operating the structure.</strong> https://ajce.aut.ac.ir/article_3681_9426c311e76888b3b2368150cd05f362.pdf