Whether or not, you are on the job site or back in the office, this book will help you to avoid mistakes, code violations, and wasted time and money. The book's four part treatment begins with constituent materials followed by self contained parts on Concrete Properties, Processes, and Concrete Repair and Rehabilitation.
Designed to be an "all in one" reference, the author includes a wealth information for the most popular types of testing. This includes: Analysis of Fresh Concrete; Testing Machines; Accelerated Testing Methods; Analysis of Hardened Concrete and Mortar; Core Sampling and Testing; Assessment of Concrete Construction ; Repair; Quality Concepts; Quality Control; Statistics; Standards, Specifications, and Codes of Practice. With this book in hand, construction engineers and even technicians find valuable information regarding Exposed Concrete Finishes, Repairing Concrete, Formwork, Precast Concrete, Concrete Roads, and Industrial Floors.
Project managers and owners will find this reference a valuable guide to concrete both in terms of its applications in construction projects and the science and chemistry of concrete for its own sake.
Fundamentals of Concrete Chemistry
Handy at your figure tip calculations
Tips for working with all types of concretes
Covers Roads, floors, and finishes
Principles of Precast, Reinforced and Prestressed Concrete
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International Conference on State of The Art of Pile Foundation and Pile Case Histories (PILE 2013)
Piling has been used very widely and the rapid rate of development of commercial buildings and infrastructures require intensive use of pilings. Like all new development, there has been considerable time between the development of improved design method and their implementation in practice. This process can be accelerated by sharing ideas and insemination of the knowledge.
Recently established Deep Foundation Research Institute in the Department of Civil Engineering, Parahyangan Catholic University will be organizing International Conference on State of The Art of Pile Foundation and Pile Case Histories (PILE 2013). The conference will be held in Bandung, West Java, Indonesia.
This program is a result of cooperation among Civil Engineering Department, Faculty of Engineering Parahyangan Catholic University, Indonesia and Institute of Rock and Soil Mechanic (IRSM), Chinese Academy of Science Wuhan, China under the auspices of Indonesian Geotechnical Society (HATTI) and International Society of Soil Mechanics and Foundation Engineering (ISSMGE).
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SEISMIC SOIL-STRUCTURE INTERACTION IN THE TIME DOMAIN
Author: Zhang Jian Jing | Size: 8.7 MB | Format:PDF | Quality:Unspecified | Publisher: DEPARTMENT OF CIVIL ENGINEERING UNIVERSITY OF CANTERBURY CHRISTCHURCH, NEW ZEALAND | Year: 2000 | pages: 245
A time domain analysis procedure and method for seismic soil-structure interaction
analysis are introduced in this work. This includes the selection of the soil model, the
far field model, the structural model and the soil-structure interaction analysis
method.
The bounding surface plasticity model is implemented to model the near field. The
boundary element method in the time domain is used as the far field model. A
coupling method between the boundary elements and finite elements has been
proposed, its main advantages being: equilibrium and compatibility conditions are
used directly and the present boundary element and finite element packages only need
a small modification before they are used in this coupled procedure.
Nonlinear local site analyses have been carried out. The comparisons of the effects of
strong and weak input motions, different soft clay sites and different input motions on
local site amplification show the effect of soil yielding on local site response.
A primary investigation of the effect of soil-structure interaction on structural
response is carried out using the linear and nonlinear soil models. When the linear
elastic model is used to represent the soil behaviour, the effects of different sites,
frames and input motions from the basement rock on the soil-structure interaction are
investigated. The results show that the natural vibration periods of the site and
structure can represent the effect of the site and structure on the soil-structure
interaction and the predominant period of the input motion can represent the effect of
the input motion on soil-structure interaction. Acceleration response at the foundation,
displacement at the top floor, inter-storey shear force and the rocking of the
foundation are used to show the effect of the natural periods on the soil-structure
interaction. When the nonlinear soil model is used to represent the soil behaviour, a
comparison of the results of the linear and nonlinear analyses shows that the soil
yielding has a great influence on vibration frequency and vibration amplitude of both
the acceleration and the displacement at the foundation and at the top floor of the
structures. The permanent settlement of the foundation shows its accumulative
characteristics.
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I am looking for this research paper by an imminent researcher . It is a highly recent publication as recent as April 2013 . Published in International Journal of Geomechanics Volume 13, Issue 2 (April 2013)
I believe many will be having access to ASCE journals . My institute is not having the access.
Please help me rgarding this paper
1. Rigid Spread Footings Resting on Soil Subjected to Axial Load and Biaxial Bending. I: Simplified Analytical Method
Published : International Journal of Geomechanics
Year : Volume 13, Issue 2 (April 2013)
Link
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2. Rigid Spread Footings Resting on Soil Subjected to Axial Load and Biaxial Bending. II: Design Aids
Published : International Journal of Geomechanics
Year : Volume 13, Issue 2 (April 2013)
Link :
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I 'll be highly gratefull to anyone who is able to provide me with these papers .
Please help i have been looking for this paper since past twenty one days so far no progress from my institute
The interaction of a building, its foundation and the underlying soils may have important effects on the behavior of
each of these components as well as on the overall system behavior. For example, the relative stiffness of a building structure, its mat foundation and the soils that support the foundation will influence the stresses and displacements of both the structure and soil. Soil-structure interaction (SSI) effects are sometimes neglected by the use of a structural model supported on a fixed base. Other simple models assume an ideally flexible or infinitely rigid foundation on an elastic subsoil. An investigation of the effects of SSI on the
stresses and displacements in the structure and the soil of a model fifty-story steel frame structure with a concrete mat foundation bearing on a deformable soil was undertaken
as a means of best understanding how to perform
and apply SSI analyses. The study included investigating the effects of the stiffnesses of the building, its mat foundation and
an elastic subsoil on the stresses, internal forces and displacements of the building, foundation and subsoils. The soil-structure model also considered the effects of foundation
embedment.
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An E cient Seismic Analysis Procedure for Torsionally Coupled Multistory Buildings Including Soil-Structure Interaction
Author: Erkan C ELEB _ I ; A. Necmettin G ¨ UND ¨ UZ | Size: 0.42 MB | Format:PDF | Quality:Unspecified | Publisher: _ Istanbul Technical University, Department of Civil Engineering _ Istanbul-TURKEY | Year: 2004 | pages: 15
In this paper, a simpli ed methodology of analysis for the seismic response of 3-dimensional irregular
high-rise buildings on a rigid footing resting on the surface of a linear elastic half-space is formulated.
An e cient method using modal decomposition and carried out in the frequency domain by using the
fast Fourier transform to obtain the structural response of torsionally asymmetric buildings, including soilstructure
interaction e ects, is presented. Applying this algorithm, full advantage is taken of classical normal
mode approximation, and the interaction problem is solved easily and e ectively within the framework of
the Fourier-transformed frequency domain analysis for a xed-base structure. The matrix formulation of
this method produces accurate approximation with less computational e ort, in spite of using the frequency
dependent impedance functions.
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Author: Jack Moehle, PhD, PE; Yousef Bozorgnia, PhD, PE; and T.Y. Yang, PhD Pacific Earthquake Engineering Research Center | Size: 1 MB | Format:PDF | Quality:Unspecified | Publisher: SEAOC 2007 CONVENTION PROCEEDINGS | Year: 2007 | pages: 10
Several west coast cities are seeing an upsurge in the
construction of high-rise buildings. Many of these buildings
feature framing systems, materials, heights, and dynamic
properties not envisioned by our current building code
prescriptive provisions. Rather than force these buildings to
conform, many jurisdictions are allowing these new designs
to proceed under the alternative procedures provision of the
building code, which allows alternative lateral-force
procedures using rational analyses based on well-established
principles of mechanics in lieu of the prescriptive provisions.
Most designs are opting for a performance-based approach in
which a rational analysis demonstrates serviceability and
safety equivalent to that intended by the code prescriptive
provisions. Several questions arise in a performance-based
design. What is equivalent performance? How should it be
demonstrated? If dynamic analysis is conducted for a range
of anticipated earthquake ground motions, how should the
ground motions be selected and how should the design value
determined? How should performance designs be reviewed?
The Tall Buildings Initiative is funding a range of short to
intermediate-term projects in 2006-2009. The final product
will be a set of written guidelines containing principles and
specific criteria for tall building seismic design. The
document is intended to support ongoing guidelines and
code-writing activities of collaborating organizations, as well
as being a stand-alone reference for designers of high-rise
buildings.
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Author: PAUL C. JENNINGS AND JACOBO BIELAK | Size: 2 MB | Format:PDF | Quality:Unspecified | Publisher: Bulletin of tile Seismological Society of America. Vol. 63, No. 1, pp. 9-48. February 1973 | Year: 1973 | pages: 40
In this study of the dynamics of building-soil interaction, the soil is modeled by a
linear elastic half-space, and the building structure by an n-degree-of-freedom
oscillator. Both earthquake response and steady-state response to sinusoidal
excitation are examined. By assuming that the interaction system possesses
n + 2 significant resonant frequencies, the response of the system is reduced to the
superposition of the responses of damped linear oscillators subjected to modified
excitations. The results are valid even though the interaction systems do not
possess classical normal modes. For the special cases of single-story systems and
the first modes of n-story systems, simplified approximate formulas are developed
for the modified natural frequency and damping ratio and for the modified excita-
tion. Example calculations are carried out by the approximate and more exact
analysis for one-story, two-story and ten-story interaction systems.
The results show that interaction tends to decrease all resonant frequencies,
but that the effects are often significant only for the fundamental mode for many
n-story structures and are more pronounced for rocking than for translation.
If the fixed-base structure has damping, the effects of interaction on the earth-
quake responses are not always conservative, and an increase or decrease in the
response can occur, depending on the parameters of the system.
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Effects of Soil-Structure Interaction on the Seismic Response of Existing R.C. Frame Buildings
Author: M. Jawad Arefi | Size: 2.7 MB | Format:PDF | Quality:Unspecified | Publisher: Istituto Universitario di Studi Superiori di Pavia Università degli Studi di Pavia | Year: 2008 | pages: 100
Comprehensive experimental and analytical studies have been carried out to understand the behaviour of existing frame buildings constructed before the introduction of seismic design codes in 1970’s. Different aspects of the response have been investigated and inherent weaknesses have been pointed out. This usually has been done assuming a fixed-base structure while ignoring the flexibility of soil and foundation. In this thesis, the interaction between the super-structure and sub-structure (SSI) is investigated by modelling the soil as simple as possible to capture the overall response of the system.
As new analytical hysteresis rules and more advanced tools of analysis have been developed in recentyears, first the nonlinear response of a single-degree-of-freedom (SDOF) system which can be representative of a broad range of existing or newly designed structures, is investigated while allowing for flexibility of the soil-foundation system and SSI effects.
This simple soil model then is employed to existing nonlinear frame models to quantify the effect of SSI on the overall response of actual structures. The use of flexible base in the analysis can lead to reduction in the structural response and damage consequences in joints and infills. In a further step, the assessed existing frames are retrofitted in beam-column joints area and the effects of flexible base condition on structural demand are examined in more detail.
The results of this study suggest that the compliance of simply modelled soilfor typical building structures have in average beneficial effects in terms of structural demand especially for stiff structures. On the other hand, the governing component of these effects, i.e. rocking of foundation, can result in average to higher absolute deformation of floors which points out to potential pounding problems for structures existing in close vicinity to each other.
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