A new method to quantify breach sizes for the flood risk management of concrete arch dams

Abstract

When predicting dam-break floods and the associated risk zones for the flood risk management of dams, the breach size must be determined by considering the complex structure of the dam body under the effects of different loads. To predict the breach size quantitatively, this article proposes the concept of an element group, comprising a group of elements through the dam body. The dam-body safety status is simulated by using the three-dimensional (3D) finite element model ANSYS and is quantified by the element reliability index β for various loads such as hydraulic and earthquake loads. A new structural reliability method for calculating the breach size was developed to quantitatively predict the failure likelihood of a dam. This new method is more intuitive and reasonable than the point safety factor k. It allows for a more accurate and quantitative prediction of the breach size of new or existing dams. An existing Roller Compacted Concrete arch dam was taken as an example to demonstrate the applicability of the new method.

Development of the design module of the software and hardware complex to ensure the safety of mutually influencing HPS

“…Является основной моделью для оценки состояния основных конструкций комплекса взаимовлияющих ГТС. Модель разработана в универсальном промышленном программном комплексе ANSYS Mechanical, который в настоящее время широко применяется при решении подобных задач [8][9][10][11][12][13][14][15][16][17][18][19][20]. В случае разработки ПАК применение подобного ПО позволяет учитывать различные сочетания нагрузок, в том числе при учете граничных условий, передаваемых из моделей ГФМ и РГММ.…”

Simulation of Flood Event in Kelantan on December 2014 as revealed by the HEC-HMS

“…One way to identify the flood inundation impact due to heavy rainfall is approached through the hydraulichydrology modeling (Fang, et al, 2016). The input data needed in HEC-HMS are rainfall data and observed discharge data.…”

Flood Inundation Prediction of Logung River due to the Break of Logung Dam

“…In order to simulate the dam break, the break size should be initially determined quantitatively (Fang, et al, 2016). The estimations of the break including location, size, and development time parameter are important to make an accurate estimate of the outflow hydrographs and downstream inundation.…”