| dc.description.abstract | Submerged Floating Tube Bridges (SFTB) are evaluated as potential fixed links in the Ferry-Free E39 project led by the National Public Road Administration (NPRA). However, the risk of internal explosions and the impact of fire on these structures are major concerns that must be addressed. Such events pose significant threats to the structural integrity and the safety of individuals and property. Therefore, it is crucial to thoroughly investigate and comprehend the structural response of the external and internal components of the SFTB when exposed to blast loading and the combination of blast load and fire.
The objective of this thesis was to investigate the structural response of internal structures in an SFTB to blast loading and the combined effect of blast loading and fire. LS-DYNA software was utilized to explore various scenarios, including different charge sizes of TNT, reinforcement presence, and consideration of pre-existing damage. The outcomes were a combination of anticipated and unforeseen results, particularly regarding the observed visual damage attributed to element erosion. A comprehensive preliminary study was conducted to ensure the reliability and accuracy of the material and blast models. This initial investigation aimed to identify any potential design constraints or limitations, thus establishing a robust foundation for the subsequent analysis | |
