ABSTRACT
Currently, natural disasters are occurring around the world with larger damage scales. It seems to increase more frequency than previously by Chanthamanivong et al. (2019). It is more difficult to predict its impact. It was always brought negative results by demolishing the infrastructure such as buildings, roads and bridges by Ario et al. (2010). The disaster will affect the bridge structures, which links between the cities or the prefectures. However, we can respond to these problems by using a deployable bridge based on the creation from Origami’s post-buckling theory as a smart bridge to reconnects the transportation system links between impacted areas and core city areas by Adachi et al. (2017). In the previous studies, the optimization structure and deployable structure of bridges have been investigating. In this paper, the authors would like to present a design method by using the influence line diagrams for scissors-type bridge approaching. It will determinate the size of each member appropriately by changing the live load distribution in possible cases on the structure to obtain the minimum and maximum of influence line border for a light vehicle. Therefore, to solve this problem for a heavier vehicle passing on the bridge for temporary, we can obtain the fundamental interior axial forces and bending moments. Thus, the authors would like to propose a new type of emergency bridge, which called scissors-type bridge model B because its stress resistance showed that higher than a double warren truss (hereinafter DWT) and it can deploy for the full set only a few hours and less employee requirement like a robotic bridge.
