Browsing Civil and Environmental Engineering by Title
Now showing items 589-608 of 878
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Nitrogen Dynamics in a Harvested Rocky Mountain Catchment
(University of Waterloo, 2018-01-19)While the impacts of forest harvesting on nitrogen (N) are largely well documented, changes to watershed N following harvesting are difficult to characterize within steep, mountainous terrain creating uncertainty for ... -
Non-destructive Evaluation of Damage in Concrete with Applications in Shallow Foundations
(University of Waterloo, 2018-09-25)The most widely used material for civil infrastructure is reinforced concrete. The concrete deteriorates over time because of several reasons, and therefore, inspection of concrete is necessary to ensure its compliance ... -
Non-Destructive Passive Magnetic and Ultrasonic Inspection Methods for Condition Assessment of Reinforced Concrete
(University of Waterloo, 2016-06-15)Sustainability, reliability, and safety of complex industrial infrastructure are crucial worldwide issues. Long-term sustainable life quality, services and economic growth provided by modern life is dependent on the quality ... -
A non-local plasticity model of stimulated volume evolution during hydraulic fracturing
(Elsevier, 2018-10-02)Hydraulic fracturing in naturally fractured rocks often leads to the creation of a stimulated zone in which the target rock formation is deformed and fractured by the reactivation and shear dilation of natural fractures ... -
Nondestructive Evaluation of Asphalt Pavement Joints Using LWD and MASW Tests
(University of Waterloo, 2010-09-16)Longitudinal joints are one of the critical factors that cause premature pavement failure. Poor-quality joints are characterized by a low density and high permeability; which generates surface distresses such as ravelling ... -
Nondestructive Evaluation of the Depth of Cracks in Concrete Plates Using Surface Waves
(University of Waterloo, 2009-04-16)Concrete structures can often be modeled as plates, for example, bridges, tunnel walls and pipes. Near-surface damage in concrete structures mostly takes the form of cracking. Surface-breaking cracks affect concrete ... -
Nonlinear Analysis of Reinforced Concrete Frames Subjected to Abnormal Loads
(University of Waterloo, 2007-09-20)The purpose of this study is to analyze reinforced concrete frames subjected to abnormal loads. Structures are rarely subjected to abnormal loads, however, when they are subjected to them, it can lead to a progressive ... -
Nonlinear Finite Element Analysis of Influence of Support Geometry on the Punching Shear Behaviour of Reinforced Concrete Slabs
(University of Waterloo, 2023-06-23)Due to their many benefits including ease of construction, open floor plans and reduced cost reinforced concrete flat slabs are one of the most common structural systems. However, these systems, particularly flat slabs ... -
Nonlinear Finite Element Analysis of Punching Shear of Reinforced Concrete Slab-Column Connections
(University of Waterloo, 2016-01-08)The code provisions for the design of reinforced concrete slabs are based on empirical and mostly statistical formulations derived from the tests. The available testing database consists of different types of slabs and in ... -
Nonlinear Finite Element Analysis of Punching Shear of Reinforced Concrete Slabs Supported on Rectangular Columns
(University of Waterloo, 2018-08-22)Historical and current design code provisions for the punching shear of reinforced concrete slabs supported on rectangular columns vary greatly and are primarily based on empirical results. Additionally, the existing ... -
Nonlinear Finite Element Analysis of Reinforced Concrete Slab-Column Connections with Headed Stud/Bolt Shear Reinforcement Subjected to Punching Shear
(University of Waterloo, 2022-08-29)While many experimental tests have been conducted by various researchers on the punching behaviour of reinforced concrete flat slabs supported on columns with headed stud/bolt shear reinforcement, there are still many ... -
Nonlinear Macromechanical Analysis of Polymeric Materials
(University of Waterloo, 2017-05-19)A new methodology for predicting the short term and long term responses of viscoelastic and viscoplastic materials is developed in this research. The methodology aims to predict the behaviour of viscoelastic/viscoplastic ... -
Nonparametric Methods for Road Safety Analysis
(University of Waterloo, 2016-08-16)Crash models for predicting long-term crash risk at some specific components of a road network are fundamental to road safety analyses such as network screening and countermeasure studies. These models are often calibrated ... -
A novel selective disassembly sequence planning method for adaptive reuse of buildings
(Elsevier, 2018-05-10)Adaptive reuse of buildings can be an attractive alternative to new construction in terms of sustainability and a circular economy. Achieving net benefits with adaptive reuse partly relies on efficiently planning building ... -
Novel SMA Dowel Connections for Seismically Resilient Timber Buildings
(University of Waterloo, 2022-05-03)The trend towards sustainable construction practices has led to a growing demand for mid- to high-rise mass timber structures and a growing interest in their behaviour during earthquakes. Due to the brittle nature of wood, ... -
Novelty Detection in Airport Baggage Conveyor Gear-Motors Using Synchro-Squeezing Transform and Self-Organizing Maps
(Prognostic and Health Management Society, 2013)A powerful continuous wavelet transform based signal processing tool named Synchro-squeezing transform (SST) has recently emerged in the context of non-stationary signal processing. Founded upon the premise of time-frequency ... -
Numerical Analysis of Crack Induced Debonding Mechanisms in FRP-Strengthened RC Beams
(University of Waterloo, 2009-01-22)The continual deterioration of infrastructure has motivated researchers to look for new ways of repairing and monitoring existing structures. A particularly challenging problem confronting engineers in the revival of the ... -
Numerical Analysis of Debonding Mechanisms of Externally Bonded FRP Reinforcement in RC Beams
(University of Waterloo, 2018-04-16)There is an urgent need to develop economic and efficient methods to repair and strengthen existing reinforced concrete structures. This demand is motivated by several factors including the aging of concrete structures, ... -
Numerical considerations for the simulation of proppant transport through fractures
(Elsevier, 2019-09)Injection of a proppant slurry (fluid mixed with granular material) into a reservoir to keep fractures open is a common procedure in hydraulic fracturing treatments. This article presents the numerical methodology for ... -
Numerical Evaluation of Classification Techniques for Flaw Detection
(University of Waterloo, 2007-09-24)Nondestructive testing is used extensively throughout the industry for quality assessment and detection of defects in engineering materials. The range and variety of anomalies is enormous and critical assessment of their ...