[PDF] A Finite Element Model For The Prediction Of Thermal Stresses In Mass Concrete eBook

Author : Adrian M. Lawrence
Publisher :
Page : pages
File Size : 43,15 MB
Release : 2009
Category :
ISBN :

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In each mix, one block was insulated on all six sides to simulate a fully adiabatic process, while the other block was insulated on five of the faces with the top face left open and exposed to environmental conditions. Measurements of the temperature and strain at predetermined locations within the blocks were recorded until the equilibrium temperature was achieved. Using the developed model, a parametric analysis was performed to evaluate the effects of cement heat generation, concrete thermal properties, dimension of concrete structure, insulation of structure, convection of heat, etc. on the temperature distribution and induced stresses in mass concrete structures. Recommendations on methods for evaluating the potential performance of mass concrete structures are presented.

Author :
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Page : pages
File Size : 30,92 MB
Release : 1905
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In the early stages of erected concrete structures, temperature rise occurs due to hydration of cement. Two theoretical models, namely, a transient thermal model and a transient stress model are developed to predict the behaviour of young concrete. The models account for several factors such as arbitrary concrete block pour history, convective heat exchange between concrete and air, and a variable modulus of elasticity. First, a model of concrete test specimens prepared as part of this research program was used to investigate what ultimately drives the potential for failure. Subsequently, the specimen size is enlarged and the size effect is captured. In addition, the pour time effect is analyzed. Finally, a model, which presents an actual dam's upper structure (two blocks), is analyzed. The numerical analysis is carried out using commercial software, which uses the finite element method revealed the magnitude and the internal residual stress distribution. (Abstract shortened by UMI.).

Author : Zhu Bofang
Publisher : Butterworth-Heinemann
Page : 525 pages
File Size : 34,99 MB
Release : 2013-12-11
Category : Technology & Engineering
ISBN : 0124078540

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Methods of controlling mass concrete temperatures range from relatively simple to complex and from inexpensive too costly. Depending on a particular situation, it may be advantageous to use one or more methods over others. Based on the author’s 50 years of personal experience in designing mass concrete structures, Thermal Stresses and Temperature Control of Mass Concrete provides a clear and rigorous guide to selecting the right techniques to meet project-specific and financial needs. New techniques such as long time superficial thermal insulation, comprehensive temperature control, and MgO self-expansive concrete are introduced. Methods for calculating the temperature field and thermal stresses in dams, docks, tunnels, and concrete blocks and beams on elastic foundations Thermal stress computations that take into account the influences of all factors and simulate the process of construction Analytical methods for determining thermal and mechanical properties of concrete Formulas for determining water temperature in reservoirs and temperature loading of arched dams New numerical monitoring methods for mass and semi-mature aged concrete

Author : Tu Anh Do
Publisher :
Page : 0 pages
File Size : 23,84 MB
Release : 2022
Category : Computers
ISBN :

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A combination of finite difference and finite element methods was employed to develop a model for predicting the temperature development and thermally induced stresses in early-age concrete members (such as bridge footings, piers, columns, girders, and slabs). A two-dimensional finite difference (FD) scheme was utilized for heat generation and transfer within a hydrating concrete member. A finite element (FE) plane strain model was then established to compute the thermal stresses in the concrete subjected to the temperature changes. The FD-FE model can be easily created using any programing language, and the methodology can be used to predict the temperatures and stresses as well as assess the possibility of early-age cracking in concrete members.

Author : Mahboub Baccouch
Publisher : BoD – Books on Demand
Page : 318 pages
File Size : 39,42 MB
Release : 2021-11-17
Category : Computers
ISBN : 1839623411

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This book provides several applications of the finite element method (FEM) for solving real-world problems. FEM is a widely used technique for numerical simulations in many areas of physics and engineering. It has gained increased popularity over recent years for the solution of complex engineering and science problems. FEM is now a powerful and popular numerical method for solving differential equations, with flexibility in dealing with complex geometric domains and various boundary conditions. The method has a wide range of applications in various branches of engineering such as mechanical engineering, thermal and fluid flows, electromagnetics, business management, and many others. This book describes the development of FEM and discusses and illustrates its specific applications.

Author : J. N. Reddy
Publisher : Springer Nature
Page : 1219 pages
File Size : 47,83 MB
Release : 2020-07-27
Category : Technology & Engineering
ISBN : 9811551448

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This book presents papers from the International Conference on Sustainable Civil Engineering and Architecture 2019, which was held in Ho Chi Minh City, Vietnam, from 24–26 October 2019. The conference brought together international experts from both academia and industry to share their knowledge and experiences, and to facilitate collaboration and improve cooperation in the field. The book highlights the latest advances in sustainable architecture and civil engineering, covering topics such as offshore structures, structural engineering, construction materials, and architecture.