Foundation Vibration Analysis

Author: John P Wolf
Publisher: Elsevier
ISBN: 0080477895
Format: PDF
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Structural analysis is usually carried out by a strength-of-materials approach that allows complex 3-D structures to be modelled adequately for design needs in a single dimension. However, this approach is not extensively used in geotechnical engineering, partly because 3-D media (soil, rock) are present, but more importantly because until recently the methods necessary to carry out this form of analysis did not exist. In the last ten years efforts at modelling practical problems in foundation analysis using a strength-of-materials approach have developed the concept of the conical bar or beam as a tool. Such cone models can be used to model a foundation in a dynamic soil-structure interaction analysis with a variation of the properties with depth. This book develops this new approach from scratch in a readable and accessible manner. A systematic evaluation for a wide range of actual sites demonstrates sufficient engineering accuracy. A short computer program written in MATLAB and a user-friendly executable program are provided, while practical examples ensure a clear understanding of the topic. Simplifies complex 3-D analysis of soil-structure interaction Applies strength-of-materials approach to geotechnical engineering Illustrated with practical examples Executable program and MATLAB program for foundation vibration analysis

Foundation Vibration Analysis Using Simple Physical Models

Author: John P. Wolf
Publisher: Pearson Education
ISBN: 0132442027
Format: PDF, Kindle
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This book provides simple physical models to represent the unbounded soil in time and frequency domain analysis. They do not supplant the more generally applicable rigorous methods, but rather supplement them. The physical models used consists of the following representations: cones based one-dimensional rod theory; lumped-parameter models with frequency-independent springs, dashpots, and masses; and prescribed wave patterns in the horizontal plane. The physical models thus offer a strength-of-materials approach to foundation dynamics.

Dynamik der Baukonstruktionen

Author: Christian Petersen
Publisher: Springer-Verlag
ISBN: 3834821098
Format: PDF, ePub
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Der Trend zu leichteren Konstruktionen und größeren Spannweiten macht es notwendig, den dynamischen Charakter der Einwirkungen auf die Tragsicherheit und Gebrauchstauglichkeit der Bauwerke stärker als bisher zu berücksichtigen; neben aerodynamischen und seismischen Einflüssen sind es solche aus Maschinenanlagen, aus dem Straßen- und Eisenbahnverkehr sowie von Menschen induzierte Einwirkungen, und nicht zuletzt Katastrophenlastfälle, wie Anprall, Flugzeugabsturz und anderes. Ausgehend von den Grundlagen der Dynamik werden Berechnungs- und Bewertungsverfahren unterschiedlicher Strenge dargestellt und anhand zahlreicher Beispiele praxisbezogen erläutert. Die mathematischen Verfahren werden in einem ausführlichen Anhang dargelegt, die einzelnen Kapitel sind jeweils durch umfangreiche Hinweise auf die Fachliteratur ergänzt.

Incorporating Sustainable Practice in Mechanics and Structures of Materials

Author: Sam Fragomeni
Publisher: CRC Press
ISBN: 0203829867
Format: PDF, Docs
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Incorporating Sustainable Practice in Mechanics of Structures and Materials is a collection of peer-reviewed papers presented at the 21st Australasian Conference on the Mechanics of Structures and Materials (ACMSM21, Victoria, University, Melbourne, Australia, 7th – 10th of December 2010). The contributions from academics, researchers and practising engineers from 17 countries, mainly from Australasia and the Asia-pacific region, cover a wide range of topics, including: • Composite structures • Computational mechanics • Concrete structures • Dynamic analysis of structures • Earthquake and wind engineering • Fibre composites • Fire engineering • Geomechanics and foundation engineering • Masonry structures • Mechanics of materials • Shock and impact loading • Steel and aluminium structures • Structural health monitoring • Structural optimisation • Sustainable materials • Timber engineering Incorporating Sustainable Practice in Mechanics of Structures and Materials will be a valuable reference for academics, researchers and practising engineers working in structural engineering and structural mechanics.

Ground Vibration Engineering

Author: Milutin Srbulov
Publisher: Springer Science & Business Media
ISBN: 9789048190829
Format: PDF, Docs
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Ground vibration consideration is gaining significance with people’s decreasing tolerance of vibration, introduction of new environmental legislations, increasing use of equipment sensitive to vibration, ageing of existing buildings and expanding construction sites to/near collapsible/liquefiable/thixotropic soil. This volume bridges the gap that exists between rather limited provisions of engineering codes/standards and complex numerical analyses/small-scale tests. The book contains descriptions of ground vibration measurements, predictions and control for engineers. Effects of most frequent sources of ground vibration arising from construction/demolition, traffic and machinery, ground wave amplification and attenuation as well as foundation kinematic and inertial interaction have been considered by simplified analyses aimed at ease and speed of use for major problems in ground vibration engineering. Comments on assumptions, limitations, and factors affecting the results are given. Case studies and examples worldwide are included to illustrate the accuracy and usefulness of simplified methods. A list of references is provided for further consideration, if desired. Audience: This work is of interest to geotechnical engineers, engineering geologists, earthquake engineers and students. Extra material: Microsoft Excel spreadsheets with the input data and results for the case studies and examples considered in this book are available at http://extras.springer.com

Dynamic Soil Structure Interaction

Author: C. Zhang
Publisher: Elsevier
ISBN: 9780080530581
Format: PDF, Kindle
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Dynamic Soil-structure interaction is one of the major topics in earthquake engineering and soil dynamics since it is closely related to the safety evaluation of many important engineering projects, such as nuclear power plants, to resist earthquakes. In dealing with the analysis of dynamic soil-structure interactions, one of the most difficult tasks is the modeling of unbounded media. To solve this problem, many numerical methods and techniques have been developed. This book summarizes the most recent developments and applications in the field of dynamic soil-structure interaction, both in China and Switzerland. An excellent book for scientists and engineers in civil engineering, structural engineering, geotechnical engineering and earthquake engineering.

Dynamic Analysis of Structures for Looms Industry

Author: Jigar Sevalia
Publisher: GRIN Verlag
ISBN: 3656755035
Format: PDF, ePub, Mobi
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Bachelor Thesis from the year 2013 in the subject Engineering - Civil Engineering, grade: AA, Gujarat University (Gujarat Technological University), course: Final Year Project, language: English, abstract: Ever since the existence of mankind, it has noticed a remarkable advancement in field of science and technology. Traditional hand weaving methods have been replaced by modern and speedy looms machine. With faster production rate, these machines proved to be a boon for textile manufacturers. However, they come with an unnoticed problem of “vibration”. Hence, there arises a need to study the effects of vibrations on the structural as well as non structural components of the building. Here in this project, an attempt has been made to study the dynamic behavior of a structure for looms industry subjected to vibration due to operations of looms machine; by changing its various parameters. With an increase in demand of textile, more and more looms machines are being installed every day. While designing the structure to house these looms it becomes incumbent upon the designer to curtail the amplitude of vibrations within the permissible limits. One must also make sure that the frequency of structure is separated for operating frequency of machine by a good margin, so that the “Resonance Condition” can be avoided. The looms machine fall under the category of reciprocating machine and have medium operating speed ranging from 100 rpm to 180 rpm. The main source of vibration is the Beating-Up motion. This generates a Harmonic Load due to the unbalanced force caused by the reciprocating sley movement. Hence, the designing of structure for looms industry is a complex process which needs prime considerations. The cost of dynamic analysis of these structure is paramount, hence a small fraction of amount is being spent might lead to inadequately constructed structures which may result in failure and shut downs, exceeding many times the cost of the capital investment required for properly designed and built structure. Now, in such a case by executing parametric study, one can decide which parameter out of many is most sensitive to odd results, so that by varying those parameters only results can be brought to the required level and do not affect other reliable results. An attempt is made in the thesis to carry out a parametric study by using software STAAD. Pro Following Parameters are studied in this thesis 1. Sizes of Column 2. Sizes of Beams 3. Story Height 4. Number of Stories Effect of remedial measures like: 1. Cross Bracing below Plinth Level 2. Full Length Jacketing of Columns 3. Partial Length Jacketing of Columns 4. Cross Tie-Beams 5. Haunches at the Junction

Finite Elemente Methoden

Author: Klaus-Jürgen Bathe
Publisher: DrMaster Publications
ISBN: 9783540668060
Format: PDF, Docs
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Dieses Lehr- und Handbuch behandelt sowohl die elementaren Konzepte als auch die fortgeschrittenen und zukunftsweisenden linearen und nichtlinearen FE-Methoden in Statik, Dynamik, Festkörper- und Fluidmechanik. Es wird sowohl der physikalische als auch der mathematische Hintergrund der Prozeduren ausführlich und verständlich beschrieben. Das Werk enthält eine Vielzahl von ausgearbeiteten Beispielen, Rechnerübungen und Programmlisten. Als Übersetzung eines erfolgreichen amerikanischen Lehrbuchs hat es sich in zwei Auflagen auch bei den deutschsprachigen Ingenieuren etabliert. Die umfangreichen Änderungen gegenüber der Vorauflage innerhalb aller Kapitel - vor allem aber der fortgeschrittenen - spiegeln die rasche Entwicklung innerhalb des letzten Jahrzehnts auf diesem Gebiet wieder. TOC:Eine Einführung in den Gebrauch von Finite-Elemente-Verfahren.-Vektoren, Matrizen und Tensoren.-Einige Grundbegriffe ingenieurwissenschaftlicher Berechnungen.-Formulierung der Methode der finiten Elemente.-Formulierung und Berechnung von isoparametrischen Finite-Elemente-Matrizen.-Nichtlineare Finite-Elemente-Berechnungen in der Festkörper- und Strukturmechanik.-Finite-Elemente-Berechnungen von Wärmeübertragungs- und Feldproblemen.-Lösung von Gleichgewichtsbeziehungen in statischen Berechnungen.-Lösung von Bewegungsgleichungen in kinetischen Berechnungen.-Vorbemerkungen zur Lösung von Eigenproblemen.-Lösungsverfahren für Eigenprobleme.-Implementierung der Finite-Elemente-Methode.