S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Civil & Environmental Engineering (건설환경공학부) Theses (Master's Degree_건설환경공학부)
Derivation of Wave Overtopping Formulas for Vertical and Inclined Seawalls Using GMDH Algorithm : GMDH 알고리즘을 이용한 수직벽과 경사식 호안에 대한 월파량 공식 유도
- Seok Bong Lee
- 공과대학 건설환경공학부
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 공과대학 건설환경공학부, 2018. 2. 황진환.
- Since wave overtopping is a complex phenomenon and it is sensitive to hydraulic and structural parameters, hydraulic model tests have been used to estimate the wave overtopping rates at coastal structures. Efforts have also been made toward deriving empirical formulas based on a large amount of accumulated data, e.g. the EurOtop formulas based on the CLASH database. To complement the EurOtop formulas, artificial neural network (ANN) models were presented, which is one of the data models. Other data models have also been developed. On the other hand, Goda developed unified formulas for vertical and inclined seawalls with smooth, impermeable surfaces. In this study, new data-based formulas are developed by using the group method of data handling (GMDH) algorithm with the CLASH and new EurOtop datasets. The GMDH formulas are shown to be more accurate than the Godas formulas and comparable in accuracy to other formulas developed separately for vertical and inclined seawalls. The estimation errors of 95% confidence interval and the range of 95% prediction error are also given. Sensitivity analysis of the derived formulas is also carried out.