Full Session with Abstracts
Quantifying effects produced by dynamic fluid loading is essential for design of structures to resist tsunami and wave impacts. To advance engineering understanding, two metal building exterior cladding sub-assembly specimens are subjected to surge and bore solitary waves experimentally. The test specimens are designed for wind loading at Risk Categories II and IV. The two designs are identical except for an additional intermediate framing member that produces higher stiffness for the Category IV specimen. The full-sized wall sub-assemblies are tested with varying ratios of wave height to initial water levels. The maximum structural responses, measured as curvatures and displacements, are identified well after initial wave impact, as the splash-up begins to subside. For a given wave height to initial water depth ratio, the pressure time history remains consistent for both specimens, while the strains and displacements are considerably different due to the different framing conditions. This demonstrates that the wave forcing which produces maximum structural response is not influenced by the structure flexibility, even though surface pressure magnitude and loading rate are higher at initial wave impact for the stiffer specimen. Structural analysis of the specimens using a linear pressure distribution along the wall elevation, based on best-fit measured pressures at the maximum strain conditions, reveals that load distributions on the specimen are different depending on the incident wave conditions (bore compared to surge). A method to predict the pressure magnitude and distribution on the cladding at the time of maximum response is proposed.