Header menu link for other important links
X
Experimental investigation of floating debris impact loading on structures during extreme waves like tsunami
Published in International Society of Offshore and Polar Engineers
2018
Volume: 2018-June
   
Pages: 83 - 88
Abstract
Debris generated during extreme events like the tsunami can impose substantial impact loading on structures closer in the coastal zone. Majority of design codes do not quantify the impact forces close to reality owing to uncertainties in defining the wave characteristics and a lack of knowledge in understanding the underlying physical processes. The present study focuses on the measurement of forces which a coastal structure would encounter due to the impact of debris in motion during such an extreme event. The study herein focuses the motion of the debris due to undular bores. 1:20 scaled model of structure and the debris were used. Experiments were conducted in a wave flume 72.5 m long and 2 m wide. A beach slope of 1:30 is laid to replicate the coastal zone. By varying the wave heights and time periods, different types of waves such as elongated single pulse waves, symmetrical N waves and unsymmetrical N waves were generated replicating the characteristics of a tsunami as close as possible. The impact tests were conducted using box shaped smart devices as debris of weight 4.62 kg, 5.82 kg and 7.02 kg. The debris is attached with an accelerometer for measuring the impact acceleration. In order to have a better understanding of the behavior of debris during the impact, a camera at a speed of 120 fps is operated. The force acting on the structure is measured with a load cell. The forces due to the velocity of the debris and the mass is compared with the force measured using load cell. The details of the testing facility, model parameters, test set-up, test procedure, analysis of results and discussion are presented in the paper. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)
About the journal
JournalProceedings of the International Offshore and Polar Engineering Conference
PublisherInternational Society of Offshore and Polar Engineers
ISSN10986189
Open AccessNo
Concepts (16)
  •  related image
    ARCTIC ENGINEERING
  •  related image
    Coastal zones
  •  related image
    Debris
  •  related image
    Ocean currents
  •  related image
    Structure (composition)
  •  related image
    Tsunamis
  •  related image
    Offshore oil well production
  •  related image
    COASTAL STRUCTURES
  •  related image
    Experimental investigations
  •  related image
    EXTREME WAVES
  •  related image
    IMPACT LOADINGS
  •  related image
    Model parameters
  •  related image
    Physical process
  •  related image
    TESTING FACILITY
  •  related image
    Wave characteristics
  •  related image
    Structural design