Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 23 for “"Hydraulic Structures"”.
-
Theoretical investigation of standing waves in hydraulic structures
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Civil Engineering, 1946.
-
Advanced Composites for Design and Rehabilitation of Hydraulic Structures
… steel have been predominantly used in civil and hydraulic infrastructure construction. With several years of service under adverse climatic conditions, those structures have exhibited moderate to severe deterioration and composite materials are emerging as one of the most feasible and economical …
-
Moisture Conditions and Frost Resistance of Concrete in Hydraulic Structures
… by frost action, have been found in concrete in hydraulic structures. These observations have raised questions about the long-term behaviour of hydraulic structures in cold regions. Superficial damage, similar in appearance to salt scaling of concrete, can be seen at the waterline of hydraulic …
-
3D Numerical Modeling of the Turbulent Flow in Hydraulic Structures
Prototype-scale hydrodynamic modelings were first conducted to evaluate the structure design of the Calumet High-Level Influent Pumping Station (CHLIPS). The complex geometries were discretized into unstructured tetrahedral meshes. A FEM flow solver was used with the k-epsilon model as the …
-
Scour at the Base of Hydraulic Structures: Monitoring Instrumentation and Physical Investigations Over a Wide Range of Reynolds Numbers
Hydraulically induced scour of the streambed at the base of bridge piers is the leading cause of bridge failures. Despite the significant scientific efforts towards the solution of this challenging engineering problem, there are still no reliable tools for the prediction and mitigation of bridge …
-
A compendium of Virginia hydrology
… of the extremes of flow on which the safety of hydraulic structures depends.
-
Extreme rainfall regime characterization in Sardinia using daily rainfall data
For the design of hydraulic structures for flood conveyance and discharge, or protection of territory against flood is fundamental the knowledge of the ``extreme rainfall regime'' in the area where the hydraulic structures must be set up. Indeed the design flood is commonly evaluated as output of …
-
Numerical modelling of local scour in rivers using fluent 6.2
… such as bridge piers and abutments and other hydraulic structures alter flow patterns causing local scouring and deposition. Excessive scour undermines the foundations of bridges and other fluvial structures which may ultimately cause their collapse. Reliable methods are needed to model the …
-
Modelling Transient Air-water Flows in Civil and Environmental Engineering
… engineering, like rivers, pipes, and hydraulic structures. Theoretical results of this doctoral research may be summarized in two main propositions. First, I show that any mathematical model for free surface flows can be extended to pressurized flows. Second, the multiphase drift‐flux …
-
Seepage monitoring and diagnosis of distresses in an earth embankment dam using probability methods
… the ERM method in seepage detection in earthen hydraulic structures is also undertaken as a result of the correlation of the field measurements of flow rates and ERM outputs. An earth dam suffering from seepage is studied and monitored visually and with the ERM to discover and locate the …
-
Sediment Control In Alluvial Rivers Using Simulation-Based Optimization
… gullying can threaten the stability of in-stream hydraulic structures, river banks, levees, and underground utilities. On the other hand, large amounts of sediment deposition can significantly reduce the flow capacity of channel or reservoir and increases further possibility of flooding. …
-
Joint probability distribution of rainfall intensity and duration
… used for peak discharge estimation in designing hydraulic structures. The traditional Gumbel probability method entails selecting annual maximum rainfall depths (intensities) conditioned on a fixed time window width (which in general will not coincide with the rainfall event duration) from a …
-
Abrasion resistance of IV-RCC used to construct spillway concrete steps of South African dams
… it can be used to assess abrasion resistance of hydraulic structures. A two-way experimental approach was adopted to achieve results for this research. The first approach was a laboratory investigation, where concrete cubes were produced under controlled conditions and tested for abrasion …
-
Simulation of suspended sediment and contaminant transport in shallow water using two-dimensional depth-averaged model with unstructured meshes
… problems of sediment transport and environmental hydraulics have been becoming more and more important and valued. Computational fluid dynamics is a very useful and powerful tool in those studies. In 2008, Dr. Liu developed a two-dimensional model HydroSed which solves for 2D shallow water …
-
Structural evaluation of fixed offshore platforms
In fixed offshore structures, damage incurred below the waterline is often difficult to detect, but significant enough to be the source of a subsequent massive failure. A technique is described that can be used to detect subsurface structural failure by detecting changes in the natural frequencies …
-
The behaviour of Siphon Spillways, with particular reference to air entrainment and model scale effects
… field of air entrainment and air regulation in hydraulic structures. An attempt is made to outline the main purpose of air - controlled siphon spillways and how they can be modified to function in a great variety of engineering situations.<br/><br/>In the experimental work, six siphon models are …
-
Modeling of surges caused by the release of breakup ice jams
… damage to property, erode river beds, endanger hydraulic structures and affect safety at river crossings. The current understanding of the breakup ice jam phenomena is insufficient and therefore the state-of-the-art is not well advanced. There is an urgent need to improve it. The primary …
-
Permeability characteristics of fibre-reinforced Perth sandy soil
… mixed with soils to enhance their strength and hydraulic characteristics. Fibre-mixed soils are often known as the fibre-reinforced soils. In the past, both systematically and randomly reinforced soils have been used widely in civil and geotechnical structures. Randomly reinforced-soils using …
Page 1 of 2