Author: SHAMSHER PRAKASH VIJAY K. PURI Professor Emeritus Professor Civil, Architecture and Environmental Civil and Environmental Engineering Engineering Southern Illinois University University of Missouri Rolla Carbondale, IL, USA Rolla, MO, USA | Size: 0.86 MB | Format:PDF | Quality:Unspecified | Publisher: Journal of Structural Engineering, SERC, Madras. INDIA | Year: April-May 2006, | pages: 39
The paper discusses the methods of analysis for determining the response of foundations subjected to vibratory loads. The design of a machine foundation is generally made by idealizing the foundation- soil system as spring-mass –dashpot model having one or two degrees of freedom. Most machine foundations are treated as surface footing and the soil spring and damping values are determined using the elastic-half space analog. The spring and damping values for response of embedded foundations can also be determined from the elastic half space concept as per Novak‟s work. The soil spring and damping values can also be obtained following the impedance –compliance function approach. The paper also presents a brief discussion of the predicted and observed response of machine foundations .
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FOUNDATIONS FOR INDUSTRIAL MACHINES AND EARTHQUAKE EFFECTS
Author: K.G. Bhatia Center for Applied Dynamics D-CAD Technologies, New Delhi | Size: 0.36 MB | Format:PDF | Quality:Unspecified | Publisher: ISET Journal of Earthquake Technology, Paper No. 495, Vol. 45, No. 1-2, March-June 2008, pp. 13–29 | Year: june2008 | pages: 17
Improvement in manufacturing technology has provided machines of higher ratings with better tolerances and controlled behaviour. These machines give rise to considerably higher dynamic forces and thereby higher stresses and, in return, demand improved performance and safety leaving no room for failures. This paper highlights need for a better interaction between foundation designer and machine manufacturer to ensure improved machine performance. The paper also describes the design aids/methodologies for foundation design. Various issues related to mathematical modeling and interpretations of results are discussed at length. Intricacies of designing vibration isolation system for
heavy-duty machines are also discussed. Influences of dynamic characteristics of foundation elements, viz., beams, columns, and pedestals etc. on the response of machine, along with some case studies, are also presented. The paper also touches upon the effects of earthquakes on machines as well as on their foundations. Use of commercially available finite element packages, for analysis and design of the foundation, is strongly recommended, but with caution.
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Geochemical modeling is an important tool in environmental studies, and in the areas of subsurface and surface hydrology, pedology, water resources management, mining geology, geothermal resources, hydrocarbon geology, and related areas dealing with the exploration and extraction of natural resources.
The book fills a gap in the literature through its discussion of geochemical modeling, which simulates the chemical and physical processes affecting the distribution of chemical species in liquid, gas, and solid phases. Geochemical modeling applies to a diversity of subsurface environments, from the vadose zone close to the Earth’s surface, down to deep-seated geothermal reservoirs.
This book provides the fundamental thermodynamic concepts of liquid-gas-solid phase systems. It introduces the principal types of geochemical models, such as speciation, reaction-path or forward, inverse- and reactive-transport models, together with examples of the most common codes and the best-practices for constructing geochemical models. The physical laws describing homogeneous and heterogeneous chemical reactions, their kinetics, and the transport of reactive solutes are presented. The partial differential or algebraic equations representing these laws, and the principal numerical methods that allow approximate solutions of these equations that can provide useful solutions to model different geochemical processes, are discussed in detail. Case studies applying geochemical models in different scientific areas and environmental settings, conclude the book.
The book is addressed to students, teachers, other professionals, and to the institutions involved in water, geothermal and hydrocarbon resources, mining, and environmental management. The book should prove useful to undergraduate and graduate students, postgraduates, professional geologists and geophysicists, engineers, environmental scientists, soil scientists, hydrochemists, and others interested in water and geochemistry.
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The main geometric parameters of curved highway bridges are studied in this dissertation and two analysis methods are developed for which general computer programs are written. On the basis of the new finite element method and the finite strip method of analysis, the behavior of curved girder bridges is studied and design recommendations are presented.
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Drilling and Completion in Petroleum Engineering: Theory and Numerical Applications (Multiphysics Modeling)
Author: Xinpu Shen, Mao Bai and William Standifird | Size: 11.4 MB | Format:PDF | Quality:Unspecified | Publisher: CRC Press | Year: 2011 | pages: 254 | ISBN: 0415665272
Modern petroleum and petrotechnical engineering is increasingly challenging due to the inherently scarce and decreasing number of global petroleum resources. Exploiting these resources efficiently will require researchers, scientists, engineers and other practitioners to develop innovative mathematical solutions to serve as basis for new asset development designs. Deploying these systems in numerical models is essential to the future success and efficiency of the petroleum industry.
Multiphysics modeling has been widely applied in the petroleum industry since the 1960s. The rapid development of computer technology has enabled the numerical applications of multiphysics modeling in the petroleum industry: its applications are particularly popular for the numerical simulation of drilling and completion processes. This book covers theory and numerical applications of multiphysical modeling presenting various author-developed subroutines, used to address complex pore pressure input, complex initial geo-stress field input, etc. Some innovative methods in drilling and completion developed by the authors, such as trajectory optimization and a 3-dimensional workflow for calculation of mud weight window etc, are also presented. Detailed explanations are provided for the modeling process of each application example included in the book. In addition, details of the completed numerical models data are presented as supporting material which can be downloaded from the website of the publisher. Readers can easily understand key modeling techniques with the theory of multiphysics embedded in examples of applications,and can use the data to reproduce the results presented.
While this book would be of interest to any student, academic or professional practitioner of engineering, mathematics and natural science, we believe those professionals and academics working in civil engineering, petroleum engineering and petroleum geomechanics would find the work especially relevant to their endeavors.
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When confronted with a fire protection problem, building management is often desperately short on information and know-how in this critical component of protection for their own facility. It is not that the material is hard to grasp, but that there is so much of it that makes the task seem so daunting.
Touching on the many subfields of fire protection engineering, Fire Protection for Commercial Facilities deconstructs the issues of fire prevention and life safety into easily digested information.
Written in a conversational tone that makes the concepts easy to understand, this book presents systems and practices that can increase a facility's ability to avoid fires, limit the development and spread of fires, and effectively control fires. It provides guidance for decision making regarding what can be effectively controlled in-house, and what should be contracted out to relieve the workload burden of the in-house staff. The information offered augments a broad range of expertise common to building or plant engineers, keeping them abreast of the divergent subfields of fire prevention.
Every facility manager dreams of the day when absolutely nothing goes wrong, the week where no new unforeseen problems occur. A fire protection problem is just one of the many emergencies that might spoil this dream. Delineating current and time-tested fire protection practices, this book explores the wide array of fire protection engineering applications encountered during typical facility operations so that facilities managers can be well-versed, informed, and better able to handle fire-related incidents.
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A method is presented for analysis of orthotropic folded plate structures with eccentric stiffeners. The development is based on finite strip stiffness which couples the plate bending and the in-plane action due to the eccentricity of the ribs. Harmonic analysis is utilized in conjunction with the direct stiffness method providing a very efficient computer program (MULSTR). The program is restricted to the analysis of prismatic folded plate structures which are simply supported at the two end diaphragms.
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Environmental Health and Hazard Risk Assessment: Principles and Calculations explains how to evaluate and apply environmental health and hazard risk assessment calculations in a variety of real-life settings. Using a wealth of examples and case studies, the book helps readers develop both a theoretical understanding and a working knowledge of the principles of health, safety, and accident management.
Learn the Fundamentals of Health, Safety, and Accident Management
The book takes a pragmatic approach to risk assessment, identifying problems and outlining solutions. Organized into four parts, the text:
Presents an overview of the history of environmental health and hazard problems, legal considerations, and emergency planning and response
Tackles the broad subject of health risk assessment, discussing toxicology, exposure, and health risk characterization
Examines hazard risk assessment in significant detail—from problem identification, probability, consequence, and characterization of hazards/accidents to the fundamentals of applicable statistics theory
Uses case studies to demonstrate the applications and calculations of risk analysis for real systems
Incorporate Health and Safety in Process Design
The book assumes only a basic background in physics, chemistry, and mathematics, making it suitable for students and those new to the field. It is also a valuable reference for practicing engineers, scientists, technicians, technical managers, and others tasked with ensuring that plant and equipment operations meet applicable standards and regulations. A clear and comprehensive resource, this book offers guidance for those who want to reduce or eliminate the environmental health effects and accidents that can result in loss of life, materials, and property.
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Under the pressure of harsh environmental conditions and natural hazards, large parts of the world population are struggling to maintain their livelihoods. Population growth, increasing land utilization and shrinking natural resources have led to an increasing demand of improved efficiency of existing technologies and the development of new ones.
Additionally, growing complexities of societal functionalities and interdependencies among infrastructures and urban habitats amplify consequences of malfunctions and failures. Malevolence, sustainable developments and climatic changes have more recently been added to the list of challenges. Over the last decades, substantial progress has been made in assessing and quantifying risks. However, with regard to the broader utilization of risk assessment as a means for societal strategic and operational planning, there is still a great need for further development.
Applications of Statistics and Probability in Civil Engineering contains the proceedings of the 11th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP11, Zürich, Switzerland, 1-4 August 2011). The book focuses not only on the more traditional technical issues, but also emphasizes the societal context of the decision making problems including the interaction between stakeholders. This holistic perspective supports the enhanced and sustainable allocation of limited resources for the improvement of safety, environment and economy. The book is of interest to researchers and scientists working in the field of risk and reliability in engineering; to professionals and engineers, including insurance and consulting companies working with natural hazards, design, operation and maintenance of civil engineering and industrial facilities; and to decision makers and professionals in the public sector, including nongovernmental organisations responsible for risk management in the public domain, e.g. building authorities, the health and safety executives, the United Nations and the World Economic Forum.
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