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Stochastic Reliability Analysis of Armor Units of Rubble-Mound Breakwaters Subject to Multiple Loads

다중하중에 따른 경사제 피복재의 추계학적 신뢰성 해석

  • Lee, Cheol-Eung (Department of Civil Engineering, Kangwon National University)
  • 이철응 (강원대학교 토목공학과)
  • Received : 2012.03.16
  • Accepted : 2012.04.19
  • Published : 2012.04.30

Abstract

A stochastic reliability analysis model has been developed for evaluating the time-dependent stability performance of armor units of rubble-mound breakwaters subjected to the multiple loads of arbitrary magnitudes which could be occurred randomly. The initial structural capacities and the damage rates of armor units of rubble-mound breakwaters could be estimated as a function of the incident wave height with a given return period by using the modified Hudson's formula and Melby's formula. The structural stability performances of armor units of rubble-mound breakwaters could be analyzed in detail through the lifetime reliability investigations according to the limit states such as the serviceability or ultimate limit state and the conditions of multiple loads. Finally, repair intervals for the structural management of armor units of rubble-mound breakwaters could quantitatively be evaluated by a new approach suggested in this paper that has been based on the target probability for repair and the accumulated probabilities of failure obtained from the present stochastic reliability analysis model.

Keywords

stochastic reliability analysis;multiple loads;armor units of rubble-mound breakwaters;limit state;structural management

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