DSpaceCRIS@UNITENhttp://dspace.uniten.edu.my/jspuiThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.Mon, 14 Oct 2019 11:53:08 GMT2019-10-14T11:53:08Z5061- Maximum stress analysis for dam structure due to different magnitude scales of ground movementshttp://dspace.uniten.edu.my/jspui/handle/123456789/11071Title: Maximum stress analysis for dam structure due to different magnitude scales of ground movements
Authors: Zawawi, M.H.; Itam, Z.; Saleha, A.; Ramli, M.Z.; Hassan, N.H.; Zahari, N.M.; Salwa, A.; Muda, Z.C.
Abstract: This study is aimed to evaluate maximum stress analysis for dam stability due to ground movement on Chenderoh dam in Perak. The dam was constructed in the year 1930s, therefore it is important to examine the dam workability and integrity for the peoples to take caution and prepared for safety. Initially, the analysis using ABAQUS is to verify the available data obtained from Structural Earthquakes Research Malaysia. The data available is the maximum stress of 108.67 kN/m2 for seismic load of 0.16g. Validation for this data after running the ABAQUS program shows that it is in good agreement with the available data, that is the result at 0.16g, the maximum stress is 112 kN/m2. Using this data for example concrete grade 20 N/m2, the maximum stress at 0.16G, 0.20g and 0.25g are analyzed. The significant of this study is that at 0.25g seismic acceleration, the dam is still stable as the stress at 0.25g does not exceed the available maximum stress of the material. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/110712018-01-01T00:00:00Z
- A review: Fundamentals of computational fluid dynamics (CFD)http://dspace.uniten.edu.my/jspui/handle/123456789/11456Title: A review: Fundamentals of computational fluid dynamics (CFD)
Authors: Zawawi, M.H.; Saleha, A.; Salwa, A.; Hassan, N.H.; Zahari, N.M.; Ramli, M.Z.; Muda, Z.C.
Abstract: Computational fluid dynamics (CFD) provides numerical approximation to the equations that govern fluid motion. Application of the CFD to analyze a fluid problem requires the following steps. First, the mathematical equations describing the fluid flow are written. These are usually a set of partial differential equations. These equations are then discretized to produce a numerical analogue of the equations. The domain is then divided into small grids or elements. Finally, the initial conditions and the boundary conditions of the specific problem are used to solve these equations. All CFD codes contain three main elements: (1) A pre-processor, which is used to input the problem geometry, generate the grid, and define the flow parameter and the boundary conditions to the code. (2) A flow solver, which is used to solve the governing equations of the flow subject to the conditions provided. There are four different methods used as a flow solver: (i) finite difference method; (ii) finite element method, (iii) finite volume method. (3) A post-processor, which is used to massage the data and show the results in graphical and easy to read format. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/114562018-01-01T00:00:00Z
- Computational fluid dynamic analysis at dam spillway due to different gate openingshttp://dspace.uniten.edu.my/jspui/handle/123456789/11488Title: Computational fluid dynamic analysis at dam spillway due to different gate openings
Authors: Zawawi, M.H.; Aziz, N.A.; Radzi, M.R.M.; Hassan, N.H.; Ramli, M.Z.; Zahari, N.M.; Abbas, M.A.; Saleha, A.; Salwa, A.; Muda, Z.C.
Abstract: This paper presents a case study of dam where computational fluid dynamic (CFD) modelling is applied to simulate the three-dimensional (3D) flow hydraulics using computational aided program using ANSYS in order to analyse the existing fluid dynamic from reservoir to spillway of the dam due to long exposure to high pressure of water and high velocity of discharge. The purpose of this study is to ensure efficiency, reliability and safety of the dam generally and specifically on the spillway. Based on the findings, a model that have a worst condition based on both analysis is a model that have bigger area of the opening gate. This is because of the huge amount of the water release from the upstream to the downstream and produce a high value of water velocity and high impact from the water that fall from upstream towards the dam spillway. In order to avoid any sudden huge amount of the water release, the water level of the reservoir need to be check frequently. The water release from the dam need to be control to avoid any disaster to the environment and the dam structure. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/114882018-01-01T00:00:00Z
- Condition assessment on hydropower dam based on simulation approach: A reviewhttp://dspace.uniten.edu.my/jspui/handle/123456789/11487Title: Condition assessment on hydropower dam based on simulation approach: A review
Authors: Salwa, A.; Zawawi, M.H.; Ramli, M.Z.; Zahari, N.M.; Saleha, A.; Hassan, N.H.; Radzi, M.R.M.; Sidek, L.M.; Muda, Z.C.
Abstract: The understanding of dam structure condition under the static and dynamic should be aware as to fulfils the criteria of safety to the public. Furthermore, it is crucial to understand the parameter of the condition assessment of hydropower dam. Sliding failure, overturning failure, concrete deterioration, concrete distress, internal failure and foundation failure are the parameter induced to damage the dam stability. However, due to some areas on dam structure are difficult to be assessed such as its penstock and spillway, development condition assessment rating on structural condition for hydropower dam based on fluid-structure interaction (FSI) simulation approach is vital since it is impossible to stop the dam operation as it is needed in generating electricity. The present study aimed is to summarize the collection of various papers that related to dam analysis as to develop the condition assessment rating on structural condition for hydropower dam based on fluid-structure interaction (FSI) simulation approach. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/114872018-01-01T00:00:00Z
- Fluid-structure interactions study on hydraulic structures: A reviewhttp://dspace.uniten.edu.my/jspui/handle/123456789/11500Title: Fluid-structure interactions study on hydraulic structures: A review
Authors: Zawawi, M.H.; Hassan, N.H.; Ramli, M.Z.; Zahari, N.M.; Radzi, M.R.M.; Saleha, A.; Salwa, A.; Sidek, L.M.; Muda, Z.C.; Kamaruddin, M.A.
Abstract: Fluid-structure interactions (FSI) occurs when fluid flow causes deformation of the structure and in turn, the deformation changes the boundary conditions of the fluid flow. FSI is considered essential in the design of many engineering systems. The example of application FSI to engineering system is hydraulic structures. Hydraulic structures are purposely created and built to perform controlled, conveyed and contained water. It will be more useful to consumers if it is functioning satisfactorily. In order to study the effect of the FSI on hydraulic structure, computational fluid dynamic (CFD) is used to analyse the data. The main objective of this paper is to review the studies conducted on FSI within hydraulic structures. The study of FSI on hydraulic structure is devoted to the solution of the equation of fluid flow through the use of computer. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/115002018-01-01T00:00:00Z
- Maximum stress analysis for dam structure due to different magnitude scales of ground movementshttp://dspace.uniten.edu.my/jspui/handle/123456789/11459Title: Maximum stress analysis for dam structure due to different magnitude scales of ground movements
Authors: Zawawi, M.H.; Itam, Z.; Saleha, A.; Ramli, M.Z.; Hassan, N.H.; Zahari, N.M.; Salwa, A.; Muda, Z.C.
Abstract: This study is aimed to evaluate maximum stress analysis for dam stability due to ground movement on Chenderoh dam in Perak. The dam was constructed in the year 1930s, therefore it is important to examine the dam workability and integrity for the peoples to take caution and prepared for safety. Initially, the analysis using ABAQUS is to verify the available data obtained from Structural Earthquakes Research Malaysia. The data available is the maximum stress of 108.67 kN/m2 for seismic load of 0.16g. Validation for this data after running the ABAQUS program shows that it is in good agreement with the available data, that is the result at 0.16g, the maximum stress is 112 kN/m2. Using this data for example concrete grade 20 N/m2, the maximum stress at 0.16G, 0.20g and 0.25g are analyzed. The significant of this study is that at 0.25g seismic acceleration, the dam is still stable as the stress at 0.25g does not exceed the available maximum stress of the material. © 2018 Author(s).
Mon, 01 Jan 2018 00:00:00 GMThttp://dspace.uniten.edu.my/jspui/handle/123456789/114592018-01-01T00:00:00Z