Browsing Civil engineering by Issue Date
Now showing items 1-20 of 413
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An area approach to forest slope stability
(1992)An area approach to analyzing the slope stability of thinly-soiled forest areas under consideration for timber harvest is presented. The objective of the research was to develop a probabilistic approach that considers the ... -
Deformation prediction of geosynthetic reinforced soil retaining walls
(1995)A program to investigate the behavior of geosynthetic reinforced soil and the deformation of geosynthetic reinforced soil retaining walls is presented. This investigation included laboratory testing of geosynthetic ... -
A computational framework for dynamic soil-structure interaction analysis
(1996)This dissertation presents: (i) a simple but general soil model; and (ii) a general computational framework, enabling the development of efficient interactive software for the analysis of dynamic soil-structure interaction ... -
Effects of liquefaction-induced lateral spreading on pile foundations
(1996)Earthquakes cause structural damage in many ways. A particularly devastating combination occurs when pile foundations are situated in loose, saturated soil deposits that are prone to liquefaction. If such a deposit is ... -
Nonlinear characteristics of tuned liquid dampers
(1997)In recent years, tuned liquid dampers (TLD) have been successfully employed in practice to mitigate undesirable structural vibrations. Although this device has many advantages, its damping mechanism has not been thoroughly ... -
Reconstruction algorithms to improve nondestructive evaluation of reinforced concrete
(1997)Two reconstruction algorithms have been developed to improve nondestructive evaluation of reinforced concrete structures. Both algorithms implement computationally demanding strategies to estimate the properties of potentially ... -
Limited dependent variable and structural equations models: empirical applications to traffic operations and safety
(1997)This dissertation presents empirical applications of econometric and statistical methodologies to traffic operations and safety. The motivation of this research was to develop methodological frameworks to investigate factors ... -
Effects of spatial constraints on channel network topology: implications for geomorphological inference
(1997)In the fifty-two years since Robert Horton's 1945 pioneering quantitative description of channel network planform (or plan view morphology), no conclusive findings have been presented that permit inference of geomorphological ... -
The Functions of Riparian Buffers in Urban Watersheds
(University of Washington, 1998)There are numerous functions that the riparian zone provides for the streams in undisturbed watersheds in the Pacific Northwest. In general the vegetation in this zone influences the water quality, hydrology, and biology ... -
New technologies for data collection and their application for empirical investigation of travel time measurement issues
(1999)Travel time is emerging as the preferred measure of congestion and mobility. From both the planning and operational perspectives, travel time is considered to be a key and desirable variable for several reasons. Travel ... -
Aspects of boreal forest hydrology: from stand to watershed
(2000)This dissertation evaluates land surface hydrologic processes in the boreal forest using observations collected as part of the Boreal Ecosystem Atmosphere Study (BOREAS). Three separate studies, two of which have appeared ... -
Scour in low gradient gravel bed streams: patterns, processes, and implications for the survival of salmonid embryos
(2000)A field investigation of scour depth in eleven gravel bed stream reaches between approximately 100 and 300 m long, with slopes between 0.001 and 0.01, showed that scour assessments need to consider two distinct bedload ... -
The frequency and extent of hydrologic disturbances in streams in the Puget Lowland, Washington
(2000)Hydrologic changes resulting from urban development degrade the biological conditions of stream ecosystems by modifying annual and inter-annual stream flow patterns. In urban streams, discharge is less than mean annual ... -
Characterization of Performance Predictors and Evaluation of Mowing Practices in Biofiltration Swales
(2000)General site maintenance is important for keeping a well functioning swale; however, it is not always easy to determine how well a site is currently functioning. Swale performance can be evaluated by measuring its hydraulic ... -
Applying mobile boundary water surface profile models to coarse-bedded bridge crossings
(2001)This thesis presents general processes for applying mobile boundary models at coarse-bedded bridge crossings. To develop these processes, the research uses a series of case studies involving highway bridges that span ... -
Spatial Effects of Urbanization on Physical Conditions in Puget Sound Lowland Streams
(University of Washington, 2001)Urban development threatens local and global ecosystems. In the Puget Sound region, urbanization has dramatically altered stream ecosystems by changing their flow regimes and their physical attributes. This study of ... -
Estimating the freshwater budget of high-latitude land areas
(2002)As the most land-locked of the world's oceans, freshwater input from the land surface strongly controls the salinity of the Arctic Ocean, and subsequently the thermohaline circulation of the North Atlantic. There is mounting ... -
A Sediment Budget for the Pipers Creek Watershed: Applications for Urban Stream Restoration
(University of Washington, 2002)Changes in land use and hydrology resulting from urbanization alter the processes of sediment production, delivery, and fluvial transport within a watershed. In this study, a sediment budget was constructed for the Pipers ... -
Prediction of the residual strength of liquefied soils
(2003)Soil liquefaction has led to extensive damage to buildings, bridge, and lifelines in past earthquakes. While the effects of liquefaction can be manifested in many ways, the most devastating are in the form of flow slides. ...