Author: Christopher Scott Williams | Size: 8.54 MB | Format:PDF | Quality:Original preprint | Publisher: University of Texas | Year: 2011 | pages: 351
Strut-and-tie modeling (STM) is a versatile, lower-bound (i.e. conservative) design method for reinforced concrete structural components. Uncertainty expressed by engineers related to the implementation of existing STM code specifications as well as a growing inventory of distressed in-service bent caps exhibiting diagonal cracking was the impetus for the Texas Department of Transportation (TxDOT) to fund research project 0-5253, D-Region Strength and Serviceability Design, and the current implementation project (5-5253-01). As part of these projects, simple, accurate STM specifications were developed. This thesis acts as a guidebook for application of the proposed specifications and is intended to clarify any remaining uncertainties associated with strut-and-tie modeling. A series of five detailed design examples feature the application of the STM specifications. A brief overview of each design example is provided below. The examples are prefaced with a review of the theoretical background and fundamental design process of STM (Chapter 2). ʺ Example 1: Five-Column Bent Cap of a Skewed Bridge - This design example serves as an introduction to the application of STM. Challenges are introduced by the bridge's skew and complicated loading pattern. A clear procedure for defining relatively complex nodal geometries is presented. ʺ Example 2: Cantilever Bent Cap - A strut-and-tie model is developed to represent the flow of forces around a frame corner subjected to closing loads. The design and detailing of a curved-bar node at the outside of the frame corner is described. ʺ Example 3a: Inverted-T Straddle Bent Cap (Moment Frame) - An inverted-T straddle bent cap is modeled as a component within a moment frame. Bottom-chord (ledge) loading of the inverted-T necessitates the use of local STMs to model the flow of forces through the bent cap's cross section. ʺ Example 3b: Inverted-T Straddle Bent Cap (Simply Supported) - The inverted-T bent cap of Example 3a is designed as a member that is simply supported at the columns. ʺ Example 4: Drilled-Shaft Footing - Three-dimensional STMs are developed to properly model the flow of forces through a deep drilled-shaft footing. Two unique load cases are considered to familiarize the designer with the development of such models.
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Author: E. H. Connell | Size: 0.64 MB | Format:PDF | Quality:Original preprint | Year: 2004 | pages: 146
It covers abstract algebra in general, but the focus is on linear algebra. Here is a brief outline of the six chapters.
Background: Equivalence relations, injective, surjective, and bijective functions, product of sets, unique prime factorization in the integers (18 pages).
Groups: Normal subgroups, quotient groups, homomorphisms, permutations and symmetric groups, product of groups (18 pages).
Rings: Ideals and quotient rings, Zn, homomorphisms, polynomial rings, product of rings, Chinese remainder theorem, characteristic, Boolean rings (16 pages).
Matrices and Matrix Rings: Invertible matrices, elementary operations and elementary matrices, determinant, similarity, trace, characteristic polynomial (14 pages).
Linear Algebra: Modules, homomorphisms, quotient modules, products and coproducts, summands, independence, generating sets, free basis, uniqueness of dimension, change of basis, rank of a matrix, geometric interpretation of determinant, nilpotent homomorphisms, eigenvalues, characteristic roots, inner product spaces, orthogonal groups, diagonalization of symmetric matrices by orthogonal matrices (40 pages).
Appendix: Chinese remainder theorem, prime and maximal ideals, UFDs, splitting short exact sequences, finitely generated modules over Euclidean domains, Jordan form, determinants and multilinear forms, dual spaces (28 pages).
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The extensive additions, and the inclusion of a new chapter, has made this classic work by Jeffrey, now joined by co-author Dr. H.H. Dai, an even more essential reference for researchers and students in applied mathematics, engineering, and physics. It provides quick access to important formulas, relationships between functions, and mathematical techniques that range from matrix theory and integrals of commonly occurring functions to vector calculus, ordinary and partial differential equations, special functions, Fourier series, orthogonal polynomials, and Laplace and Fourier transforms. During the preparation of this edition full advantage was taken of the recently updated seventh edition of Gradshteyn and Ryzhik’s Table of Integrals, Series, and Products and other important reference works. Suggestions from users of the third edition of the Handbook have resulted in the expansion of many sections, and because of the relevance to boundary value problems for the Laplace equation in the plane, a new chapter on conformal mapping, has been added, complete with an atlas of useful mappings.
- Comprehensive coverage in reference form of the branches of mathematics used in science and engineering
- Organized to make results involving integrals and functions easy to locate
- Results illustrated by worked examples
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This text aims to facilitate a broader understanding of the total hydraulic system, including hardware, fluid properties and testing, and hydraulic lubricants. It provides a comprehensive and rigorous overview of hydraulic fluid technology and evaluates the ecological benefits of water as an important alternative technology. Equations, tables and illustrations are used to clarify and reinforce essential concepts.
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T. Paulay_PhD Thesis: The coupling of shear walls_Volume 1
Author: Thomas Paulay | Size: 11 MB | Format:PDF | Quality:Unspecified | Publisher: University of Canterbury | Year: 1969 | pages: 222
This thesis is a milestone in Civil Engineering. His author is a personality whom had a huge influence in Civil Engineering (specifically in the fields of Seismic Design of Concrete Structures and Earthquake Engineering).
Part of the Abstract: In this first project of a research program, initiated to investigate the behaviour of coupled shear walls subjected to seismic type lateral loading, the strength and behavior of the coupling beams is examined.
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Keywords: Slope engineering, Infrastructure, Research & Development (R&D), Culture
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Author: John N. Newman | Size: 5.77 MB | Format:DjVu | Quality:Original preprint | Publisher: The MIT Press | Year: August 15, 1977 | pages: 402 | ISBN: 0262140268, ISBN-13: 978-0262140263
Marine Hydrodynamics was specifically designed to meet the need for an ocean hydrodynamics text that is up-to-date in terms of both content and approach. The book is solidly based on fundamentals, but it also guides the student to an understanding of their engineering applications through its consideration of realistic configurations.
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SEISMIC DESIGN OF JOINTED PRECAST CONCRETE WALL SYSTEMS
Author: Sri Sritharan; Sriram Aaleti | Size: 0.3 MB | Format:PDF | Quality:Original preprint | Publisher: 4th International Conference on Earthquake Engineering, Taipei, Taiwan | Year: October 2006 | pages: 10
The precast concrete wall presented in this paper utilizes two or more individual precast walls that are connected to the footings using unbonded post-tensioning at the center of each wall.
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