應用動床模式建構橋墩沖刷模擬分析操作系統=Using mobile-bed numerical model on operational system development for bridge pier scour depth
Journal
農業工程學報
Journal Volume
64
Journal Issue
4
Pages
58-75
Date Issued
2018
Author(s)
Lee, F.-Z.
Lai, J.-S.
Lin, Y.-B.
Chang, K.-C.
Liu, X.
Huang, C.-C.
Chang, C.-C.
Wang, S.-D.
Abstract
Due to the extreme weather, flood disasters occur frequently in recent years. It induces the changing of hydrological condition, flow and sediment transport mechanics, river bed slope, river bed degradation and river bed aggradation. However, bridge pier geometry and disposition, bank and river channel protection, and hydraulic works are the main factors affecting the erosional depth and river bed stabilization. Therefore, it is a vital issue to develop a system that can provide valuable and useful information for the estimation of bridge pier scour depth. This study apply interface operation system to develop and integrate rainfall runoff model, 1-D and 2-D hydraulic and sediment transport model, and calculation formulas of bridge pier scour depth. The purpose of this study is to develop an estimation system of bridge pier scour depth that is suitable for the hydraulic pattern simulation and sediment transport routing in the Zhuoshui River Basin. Numerical simulation models combined with interface operation on assessment system development of specific bridge pier scour depth is established. Therefore, it can be implemented to simulate the general scour and local scour depth at bridge piers. In this study, the historical events are adapted to calibrate and verify models that include rainfall runoff model, 1-D and 2-D hydraulic and sediment transport model, and calculation formulas of bridge pier scour depth. In addition, easy operation and integrated interface is developed in the system for the estimation of bridge pier scour depth. The system can supplies users for model verification by input and output through the interface. To achieve the forecast of the erosional depth on the bridge piers in the ZhuoShui River, the system can also be connected to the rainfall forecast system of Taiwan Typhoon and Flood Research Institute (TTFRI) and the tidal forecast of Central Weather Bureau (CWB) in the future. Additionally, the results can be provided references for the management unit of bridges, such as estimating the risk of bridge piers damage and the necessity of bridge closure.
Publisher
社團法人台灣農業工程學會
Type
journal article