Author: D. Godone and S. Stanchi | Size: 36 MB | Format:PDF | Quality:Unspecified | Publisher: InTeOpP | Year: 2011 | pages: 330 | ISBN: 9533077109 9789533077109
This book colntains a series of papers on erosion, not focusing on agronomic implications, but on a variety of other relevant aspects of the erosion phenomena. The book covers a wide range of erosion-related themes from a variety of points of view (assessment, modeling, mitigation, best practices etc.).
The book is divided into three sections:
1) various implications of land management in arid and semiarid ecosystems,
2) erosion modeling and experimental studies;
3) other applications (e.g. geoscience, engineering).
Contents
Preface
Part 1 Arid and Semiarid Land Management
1 Natural Potential for Erosion for Brazilian Territory
2 Soil Erosion Processes in Semiarid Areas: The Importance of Native Vegetation
3 Deforestation / Reforestation in Mediterranean Europe: The Case of Greece
4 Soil Erosion Under Different Land Use and Cover Types in a Marginal Area of Portugal
5 Soil Erosion and Conservation Measures in Semiarid Ecosystems Affected by Wildfires
Part 2 Experimental Studies and Modeling Applications
6 Investigation of Effective Factors on Runoff Generation and Sediment Yield of Loess Deposits Using Rainfall Simulator
7 Plot-Scale Experimental Studies
8 Impact of Rainfall Microstructure on Erosivity and Splash Soil Erosion Under Simulated Rainfall
9 Soil Loss-Rainfall Duration Relations as Affected by Peat Content, Soil Type and Compaction Effort
10 Soil Erosion and Surface Runoff on Slopes in Mountain Environment Depending on Application Technique and Seed Mixture -ACase-Study
11 Combined Hydroseeding and Coconet Reinforcement for Soil Erosion Control
12 SCALES: An Original Model to Diagnose Soil Erosion Hazard and Assess the Impact of Climate Change on Its Evolution
13 SATEEC GIS System for Spatiotemporal Analysis of Soil Erosion and Sediment Yield
Part 3 Other Applications in Engineering/Geoscience
14 Internal Erosion Due to Water Flow Through Earth Dams and Earth Structures
15 Lake Mladotice in the Western Czech Republic - Sediments as a Geoarchive for Flood Events and Pre- to Postcommunist Change in Land Use since 1872
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Practical Guideline for Investigation,Repair and Strengthening of Cracked Concrete Structures-2009-
Size: 17 MB | Format:PDF | Quality:Scanner | Publisher: Japan Concrete Institute | Year: 2009 | pages: 156
Some cracks are very harmful and shuld be repaired as soon as possible.A good guideline on how to deal with cracks in concrete structures has been needed.This guideline describes the stadard methods recommended by the Research Committee of the JCI for the technical handling of cracks in concrete structures.
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These Guide Specifications address the design and construction of typical pedestrian bridges which are designed for and intended to carry primarily pedestrians, bicyclists, equestrian riders, and light maintenance vehicles, but not designed and intended to carry typical highway traffic. Pedestrian bridges with cable supports or atypical structural systems are not specifically addressed.
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Advances in Urban Flood Management (Balkema: Proceedings and Monographs in Engineering, Water and Earth Sciences)
Author: R. Ashley, S. Garvin, E. Pasche, A. Vassilopoulos, C. Zevenbergen | Size: 8.3 MB | Format:PDF | Quality:Unspecified | Publisher: Taylor & Francis | Year: 2007 | pages: 499 | ISBN: 0415436621, 978-0415436625
One of the effects of global climate change is the increasing variability of extreme flood events and cyclones. Current measures to mitigate flood impacts, particularly in the urban environment, are based on previously-planned flood risk intervals and no longer provide sufficient protection. Being prepared for unexpected changes and extreme flood events asks for a paradigm shift in current strategies to avoid and manage flood disasters. In order to stem the increasing impact of urban floods, a major rethink of current planning and flood management policies and practice is required, taking into account different spatial and temporal scales. This book addresses a broad spectrum of relevant issues in the emerging field of urban flood management. It may act as a stimulus for further research and development in urban flood management while informing and engaging stakeholders in the promotion of integrated and cooperative approaches in water management. An interdisciplinary approach which will be of interest to all those who are active in water, risk and urban management.
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Advances in Fluid Mechanics VIII (Wit Transactions on Engineering Sciences)
Author: M. Rahman, C. A. Brebbia, M. Rahman, C. A. Brebbia | Size: 20.6 MB | Format:PDF | Quality:Unspecified | Publisher: WITpress | Year: 2010 | pages: 609 | ISBN: 184564476X
This book contains the papers presented at the Eighth International Conference on Advances in Fluid Mechanics held September 15-17, 2010, in Algarve, Portugal. This biennial conference is the latest in a successful series that began in 1996. The conference provides a platform for engineering professionals to share advances and new applications in the area of fluid mechanics.
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Theoretical and Experimental Study of Plate-Strengthened Concrete Columns under Eccentric Compression Loading
Author: Lu Wang and Ray Kai-Leung Su | Size: 1.4 MB | Format:PDF | Quality:Unspecified | Publisher: ASCE | Year: 2013 | pages: 10
Steel jacketing has been widely used for strengthening RC columns in the last four decades. In practice, the RC columns to be
strengthened are usually subjected to eccentric precompressed axial loads. Until now, there have been only limited studies conducted that address
the stress-lagging effects between the original column and the new jacket due to the preexisting load. In this paper, the precambered steel
plate–strengthening approach, which can alleviate the stress-lagging effects, was adopted to improve the axial strength and moment capacity of
the preloaded RC columns subjected to eccentric compression loading. An experimental study that involved eight specimens with different
eccentricities, plate thicknesses, and initial precamber displacements was conducted to examine the ductility and moment-curvature response of
strengthened columns and to validate the effectiveness of this approach. A theoretical model was developed to predict the axial load capacity of
the plate-strengthened columns.Acomparison of the theoretical and experimental results showed that the theoretical model accurately predicted
the axial load-carrying capacities of the plate-strengthened columns under eccentric compression loading
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Probabilistic Fatigue Life Estimation of Steel Bridges by Using a Bilinear S-N Approach
Author: Kihyon Kwon, Dan M. Frangopol and Mohamed Soliman | Size: 1.4 MB | Format:PDF | Quality:Unspecified | Publisher: ASCE | Year: 2012 | pages: 13
This paper focuses on estimating the fatigue life below the constant amplitude fatigue threshold (CAFT) of steel bridges by using a
probabilistic approach on the basis of a bilinear stress life (i.e., the S-N approach). The current AASHTO S-N approach uses a single S-N line
for predicting the fatigue life. However, because of the variation of actual applied live-load stress cycles, this approach very often results in a
severe underestimation of the useful life of structures. It implies that fatigue damage in respective structural steel details may be overestimated.
To improve fatigue life estimation, a bilinear S-N approach is integrated into a probabilistic framework that can model the uncertainties
associated with the fatigue deterioration process. In this approach, the equivalent stress range is computed by using two S-N slopes and
several probability density functions associated with stress ranges. These probabilistic functions are determined on the basis of stress-range
bin histograms from long-term monitoring. An existing bridge that is expected to experience finite fatigue life is used to illustrate the application
of the proposed approach.
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A reliability-based fatigue-damage-evaluation procedure developed
in the companion paper is extended in this paper to incorporate information from
nondestructive inspections (NDI). Since inspections are required at regular intervals,
the results from these inspections can be used for fatigue maintenance of steel
bridges. The sensitivity and capability of some of the inspection methods, including
ultrasonic inspection, are investigated. Inspection information is beneficial; however,
it adds uncertainty to the fatigue-evaluation process. The detectability and
the accuracy are the two additional sources of uncertainty in the NDI. The uncertainties
in them are quantified. The detection events are classified into three cases,
no crack detection, crack detection but without size measurement, and crack detection
with the crack-size measurement. Using the information from k inspections,
the distributions of the basic random variables and the corresponding reliability
index are updated. Using the information on the updated reliability index, a decision
can be made on what to do next, in terms of reducing the next scheduled inspection
interval, or whether to repair, replace, or do nothing. The procedure is explained
with the help of an example. It is concluded that the inspection results can be used
to maintain the fatigue-damage integrity of steel bridges. Fatigue damage-control
curves are also proposed for everyday use
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