Author: Mary Emerson (Writer on bridges)Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 62
Book Description
Extreme Values of Bridge Temperatures for Design Purposes
Author: Mary Emerson (Writer on bridges)Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 62
Book Description
Extreme Values of Bridge Temperatures for Design Purposes
Author: Mary EmersonExtreme Values of Bridge Temperatures for Design Purposes by Mary Emerson
Author: Mary EmersonBridge Design for Economy and Durability
Author: Brian PritchardPublisher: Thomas Telford
ISBN: 9780727716712
Category : Technology & Engineering
Languages : en
Pages : 200
Book Description
Describes several bridging concepts, which were developed and successfully applied during the author's forty years of close involvement with UK and international bridge design, construction, maintenance and research. The concepts mainly apply to the small/medium span range of bridges and viaducts.
Bridge Temperatures
Author: Extreme Values of Thermal Loading Parameters in Concrete Bridges
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
The present paper addresses the question of developing design criteria for thermal effects in concrete bridges. The objective is to determine extreme temperature effects having specified return periods. The parameters of the local meterorological regime which critically affect the extreme thermal effects are identified. Their variation in time is analyzed and related to the thermal loading parameters in a concrete bridge. These include average temperature, temperature difference between sections, linear temperature differential, and residual temperature fields. The analysis of the extreme values of these parameters is described in detail. The reduction of data, the model development, and the statistical analysis are clarified by the application to the Bow River light rail transit bridge in Calgary, Alberta. Temperature profiles in several sections of this structure are being measured on an hourly basis. The findings of this study show certain shortcomings of the temperature effects design criteria currently included in the Canadian bridge design codes.
Integral Bridges
Author: George L. EnglandPublisher: Thomas Telford
ISBN: 9780727728456
Category : Technology & Engineering
Languages : en
Pages : 178
Book Description
This work was commissioned by the Highways Agency to produce guidance for bridge designers by addressing the thermally induced soil/structure integration problem created by environmental changes of temperature and the associated cyclical displacements imposed on the granular backfill to the bridge abutments. It develops a better theoretical understanding of the cyclic performance, in particular the strain racheting in the backfill soil when in contact with a stiff structure. It also identifies the governing soil parameters and examines their influence in the interaction problem, develops numerical modelling procedures to predict interactive soil behaviour, and identifies and quantifies the controlling features of bridge structures relevant to the interaction problem.
Building for the Future: Durable, Sustainable, Resilient
Author: Alper IlkiPublisher: Springer Nature
ISBN: 3031325192
Category : Technology & Engineering
Languages : en
Pages : 1969
Book Description
This book presents the proceedings of the fib Symposium “Building for the future: Durable, Sustainable, Resilient”, held in Istanbul, Turkey, on 5–7 June 2023. The book covers topics such as concrete and innovative materials, structural performance and design, construction methods and management, and outstanding structures. fib (The International Federation for Structural Concrete) is a not-for-profit association whose mission is to develop at an international level the study of scientific and practical matters capable of advancing the technical, economic, aesthetic, and environmental performance of concrete construction.
Impact of Extreme Summer Temperatures on Bridge Structures
Author: Ryan Michael HagedornPublisher:
ISBN:
Category : Bridges
Languages : en
Pages : 152
Book Description
Climate change and its effect on weather in the United States is a well-documented phenomenon. In particular, extreme heat waves have become more intense, more frequent, and longer lasting, especially in the southern United States. As with much of America's transportation infrastructure, prestressed concrete bridge girders experience the effects of these heat waves. Uneven heating of optimized bridge girder sections results in large non-linear temperature gradients. In this study, temperature was monitored in three different AASHTO I-girders to determine the vertical and transverse temperature gradients in a pre-deck placement condition. It was determined that the current design standard, which uses a non-linear vertical thermal gradient, was inaccurate in both shape and magnitude for girders Type IV and smaller in this condition. Transverse gradients were also recommended as none are included in design standards. Using three dimensional modeling, this study also sought to understand the response of the girders to non-linear temperature gradients and if they should be accounted for in girder design.
Hydro-Environmental Analysis
Author: James L. MartinPublisher: CRC Press
ISBN: 1138000868
Category : Science
Languages : en
Pages : 5742
Book Description
Focusing on fundamental principles, Hydro-Environmental Analysis: Freshwater Environments presents in-depth information about freshwater environments and how they are influenced by regulation. It provides a holistic approach, exploring the factors that impact water quality and quantity, and the regulations, policy and management methods that are necessary to maintain this vital resource. It offers a historical viewpoint as well as an overview and foundation of the physical, chemical, and biological characteristics affecting the management of freshwater environments. The book concentrates on broad and general concepts, providing an interdisciplinary foundation. The author covers the methods of measurement and classification; chemical, physical, and biological characteristics; indicators of ecological health; and management and restoration. He also considers common indicators of environmental health; characteristics and operations of regulatory control structures; applicable laws and regulations; and restoration methods. The text delves into rivers and streams in the first half and lakes and reservoirs in the second half. Each section centers on the characteristics of those systems and methods of classification, and then moves on to discuss the physical, chemical, and biological characteristics of each. In the section on lakes and reservoirs, it examines the characteristics and operations of regulatory structures, and presents the methods commonly used to assess the environmental health or integrity of these water bodies. It also introduces considerations for restoration, and presents two unique aquatic environments: wetlands and reservoir tailwaters. Written from an engineering perspective, the book is an ideal introduction to the aquatic and limnological sciences for students of environmental science, as well as students of environmental engineering. It also serves as a reference for engineers and scientists involved in the management, regulation, or restoration of freshwater environments.