Hydraulic Experiments on Impact Forces from Tsunami-Driven Debris

AbstractImpact on a column by an idealized 1:5-scale shipping container propelled by tsunami flow was modeled in a large-scale wave flume. Results from hydraulic experiments were compared with corresponding data from in-air impact experiments using the same experimental configuration to assess the hydrodynamic effects on impact force and duration. Experiments were conducted by varying flow conditions, velocity, and nonstructural mass. An aluminum specimen was tested empty and with the addition of nonstructural mass to simulate partially loaded shipping containers. The measured peak impact forces from the longitudinal test in water were observed to have an increase no greater than 17% of the corresponding measured peak impact forces from the longitudinal test in air. The impact duration measured from the in-air test provided a lower bound for the impact duration measured for the in-water tests. Hydraulic effects were shown to increase the impact duration by an average of 20%. The additional nonstructural m...

[1]  Daniel T. Cox,et al.  Influence of Finite-Length Seawalls for Tsunami Loading on Coastal Structures , 2012 .

[2]  Marcelo H. Kobayashi,et al.  Water-Driven Debris Impact Forces on Structures: Experimental and Theoretical Program , 2013 .

[3]  Hideo Matsutomi,et al.  Inundation flow velocity of tsunami on land , 2010 .

[4]  Clay Naito,et al.  Effect of nonstructural mass on debris impact demands: Experimental and simulation studies , 2015 .

[5]  Norimi Mizutani,et al.  Collision Analysis of Container Drifted by Runup Tsunami Using Drift Collision Coupled Model , 2009 .

[6]  Hideo Matsutomi,et al.  Method for Estimating Collision Force of Driftwood Accompanying Tsunami Inundation Flow , 2009 .

[7]  Clay Naito,et al.  Full-Scale Experimental Study of Impact Demands Resulting from High Mass, Low Velocity Debris , 2014 .

[8]  Tiziana Rossetto,et al.  The Indian Ocean tsunami of December 26, 2004: observations in Sri Lanka and Thailand , 2007 .

[9]  Ioan Nistor,et al.  Experimental Investigation of Tsunami Impact on Free Standing Structures , 2010 .

[10]  Naoki Fujii,et al.  Applicability of Simulation Model for Drift Behavior of Containers due to Tsunami , 2006 .

[11]  H. Ronald Riggs,et al.  Simple hydroelastic impact models for water-borne debris , 2012 .

[12]  Anil C. Wijeyewickrema,et al.  INELASTIC DYNAMIC ANALYSIS OF AN RC BUILDING IMPACTED BY A TSUNAMI WATER-BORNE SHIPPING CONTAINER , 2012 .

[13]  Robert B. Haehnel,et al.  Maximum Impact Force of Woody Debris on Floodplain Structures , 2004 .

[14]  Paul W. Fieguth,et al.  Color-based tracking of heads and other mobile objects at video frame rates , 1997, Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition.