Does anybody have access to this thesis ?, it's will be very help if anyone can shared this thesis to me.
Article/eBook Full Name: Dissertation/Thesis-Structural wall systems nonlinear modeling and collapse assessment of shear walls and slab-column frames
Author(s): Gogus, Aysegul, Ph.D.
Publish Date: 2010
Published By: ProQuest Dissertations & Theses (PQDT)
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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. Features: 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; and new numerical monitoring methods for mass and semi-mature aged concrete.
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Finite Element Analysis and Design of Metal Structures
Author: Ehab Ellobody, Ran Feng, Ben Young | Size: 16 MB | Format:PDF | Quality:Original preprint | Publisher: Butterworth-Heinemann | Year: 2013 | pages: 211 | ISBN: 0124165613
Traditionally, engineers have used laboratory testing to investigate the behavior of metal structures and systems. These numerical models must be carefully developed, calibrated and validated against the available physical test results. They are commonly complex and very expensive. From concept to assembly, Finite Element Analysis and Design of Metal Structures provides civil and structural engineers with the concepts and procedures needed to build accurate numerical models without using expensive laboratory testing methods. Professionals and researchers will find Finite Element Analysis and Design of Metal Structures a valuable guide to finite elements in terms of its applications.
Presents design examples for metal tubular connections
Simplified review for general steps of finite element analysis
Commonly used linear and nonlinear analyses in finite element modeling
Realistic examples of concepts and procedures for Finite Element Analysis and Design
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Abstract
In conventional design of pile foundations, all loads are taken by the piles, i.e. the contact pressure between the raft and the soil is neglected. In the last decades geotechnical engineers have started to take this pressure into account in design of pile foundation. Such a foundation, where the raft and the piles interact to transfer the loads to the ground, is in this dissertation called piled raft foundation or piled raft.
Analysis of piled rafts requires numerical methods, due to complex soil-structure interaction. In this dissertation four different modelling approaches for analysis of piled raft foundation are compared; a full three dimensional finite element method model (FEM model) and also three plane strain FEM models (i.e. two dimensional models). All models are carried out by using programs developed by Plaxis, i.e. Plaxis 3DFoundation and Plaxis 2D, respectively. The plane strain models are similar but differ in the way of modelling the interaction between the piles and the soil. The first plane strain model is introduced in Chapter 3.4.2. Since this model produce questionable results, due to too weak modelling of the pile-soil interaction, two alternative models are introduced in Chapter 8.4 and 8.5 (called AM1 and AM2). Piled raft foundations are three dimensional problems, in a two dimensional analysis one has to introduce simplifications and thereby inaccuracies. However, it could still be convenient to use this method since it is faster and the software is less expensive. The inaccuracies in a 2D model compared to a 3D model will vary depending on the characteristics of the problem. The object of the work is to study the inaccuracies and how these changes as the characteristics of the problem change.
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Dynamic analysis of buildings for earthquake- resistant design
Author: Murat Saatcioglu and JagMohan Humar | Size: 536 KB | Format:PDF | Quality:Unspecified | pages: 22
The proposed 2005 edition of the National Building Code of Canada specifies dynamic analysis as the preferred
method for computing seismic design forces and deflections, while maintaining the equivalent static force
method for areas of low seismicity and for buildings with certain height limitations. Dynamic analysis procedures are
categorized as either linear (elastic) dynamic analysis, consisting of the elastic modal response spectrum method or the
numerical integration linear time history method, or nonlinear (inelastic) response history analysis. While both linear
and nonlinear analyses require careful analytical modelling, the latter requires additional considerations for proper simulation
of hysteretic response and necessitates a special study that involves detailed review of design and supporting
analyses by an independent team of engineers. The paper provides an overview of dynamic analysis procedures for use
in seismic design, with discussions on mathematical modelling of structures, structural elements, and hysteretic response.
A discussion of the determination of structural period to be used in association with the equivalent static force
method is presented.
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This review article provides an overview of the problems pertaining to structural dynamics with bolted joints. These problems are complex in nature because every joint involves different sources of uncertainty and non-smooth non-linear characteristics. For example, the contact forces are not ideally plane due to manufacturing tolerances of contact surfaces. Furthermore, the initial forces will be redistributed nonuniformly in the presence of lateral loads. This is in addition to the prying loading, which is non-linear tension in the bolt and non-linear compression in the joint. Under environmental dynamic loading, the joint preload experiences some relaxation that results in time variation of the structure’s dynamic properties.
Most of the reported studies focused on the energy dissipation of bolted joints, linear and non-linear identification of the dynamic properties of the joints, parameter uncertainties and relaxation, and active control of the joint preload. Design issues of fully and partially restrained joints, sensitivity analysis to
variations of joint parameters, and fatigue prediction for metallic and composite joints will be discussed.
r 2003 Elsevier Ltd. All rights reserved.
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Posted by: vangjo - 12-20-2013, 11:56 AM - Forum: Archive
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Article/eBook Full Name: Earthquake Resistant Concrete Structures
Author(s): Andreas Kappos, G.G. Penelis
Edition: 1st ed
Publish Date: December 12, 1996
ISBN: 978-0419187202
Published By: CRC Press
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Author: Dinu BRATOSIN Institute of Solid Mechanics - Romanian Academy, | Size: 352 KB | Format:PDF | Quality:Unspecified | Publisher: SISOM 2006, Bucharest 17-19 May | Year: 2006 | pages: 9
The main goal of the base-isolated technology is to shift the natural period of structure away from the dominant period of earthquake excitation. Using a linear one-degree-of-freedom model for structure with fixed base and a non-linear one-degree-of-freedom model for base-isolated structure one presents some remarks for optimum choice of the isolated natural period taking into account the non-linear characteristics of the devices and materials from isolator layer and from site materials.
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