ON MODELLING OF TYPHOON-INDUCED NON-STATIONARY WIND SPEED FOR TALL BUILDINGS
Author: J. CHEN AND Y. L. XU | Size: 1.74 MB | Format:PDF | Quality:Unspecified | Publisher: J. CHEN AND Y. L. XU | Year: 2004 | pages: 19
Typhoon-induced wind around tall buildings may not be stationary because it is a large body of rotating air. A
new approach is thus proposed in this paper for characterizing typhoon-induced wind speed. Typhoon-induced
non-stationary wind speed is modelled as a deterministic time-varying mean wind speed component plus a zero
mean stationary fluctuating wind speed component. The time-varying mean wind speed is naturally extracted
from the measured wind speed time history using empirical mode decomposition (EMD). Wind characteristics
described in the traditional approach based on a stationary wind model are redefined and extended in the nonstationary
wind model. The new approach is then applied to wind data measured at the Di Wang building during
Typhoon York. The results show that most of recorded wind samples are non-stationary but they can be decomposed
into a time-varying mean wind speed component plus a well-behaved zero mean fluctuating wind speed
component admitted as a stationary random process with Gaussian distribution. Other wind characteristics such
as probability distribution of fluctuating wind speed, turbulence intensity, gust factor, and wind spectrum obtained
by the new approach seem to be more realistic than those gained by the traditional approach.
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Author: Brian W. Smith | Size: 17 MB | Format:PDF | Quality:Scanner | Publisher: Thomas Telford Ltd | Year: 2007 | pages: 352 | ISBN: 9780727734006
“engineers working in the fields of design, analysis, fabrication and construction of masts and/or towers will accomplish their tasks with confidence by consulting this book”
- Mamoru Kawaguchi, President of IASS
This book combines the accumulated knowledge of structural engineers, scientific researchers, mast and tower owners and antenna experts with experience in the analysis, design, construction and operation of communication structures, into one accessible volume.
It introduces the reader to the basis of design, analysis and construction of lattice towers and guyed masts used for communication purposes (radio, television, mobile phones and radar) and looks at new developments and the effects on the industry. The author focuses on the light and wind sensitive structures that support the aerials that make communication services possible and states that the design and construction of these structures involves significant engineering expertise to ensure that they are safe and reliable, yet cost effective and efficient.
A brief history of tall structures is provided and the various types of structure, dictated by their function and/or location are described. The loading on such structures is described and the methods of calculating their response outlined. Dynamic effects from vortex shedding or galloping are outlined, together with detailed guidance on how to minimise these effects and how to assess fatigue life.
The book provides detailed information on:
history, design considerations and failures
meteorological parameters, wind resistance and strength
aerodynamic stability, fatigue, access and safety
codes of practice and design standards.
Communication structures is essential for both the established and the new generation of engineers, telecom administrators, contractors, masts and tower fabricators and related professionals.
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Full title:Linear Analysis of Skeletal Structures
Author: David Johnson
Publisher: Thomas Telford Ltd
Page Size: 297x210mm
Number of Pages: 288
Description
Linear Analysis of Skeletal Structures meets the demands of a typical prominent structural engineering educator who aims to: "teach students how to model, how to use computer packages in real contexts, to validate models, verify results and carry out parameter studies. Hand analysis is now only for very simple problems and for back-of-envelope checks".
The checks referred to are usually statically based and it is therefore presumed that the reader has a firm background in statics. This unique book principally:
tackles statically indeterminate structures
replaces traditional hand analysis teaching of indeterminate structures by a workbook format approach based on qualitative and quantitative (computer analysis) studies
provides comprehensive coverage of the behavior of skeletal structures - beams, plane trusses arches, plane frames, space trusses, grids and space frames
uses case studies to provide experience of, using computer packages in real contexts; worksheets to develop qualitative understanding; and computer based problems to carry out parameter studies
emphasises computer modeling and the validation of computer models and solutions.
A workbook approach is used with individual chapters covering fundamentals, beams, plane trusses, arches, plane frames, space trusses, grids, and space frames. Each chapter describes the fundamental behavior of a particular structural form, which is supplemented by qualitative examples and problems.
The book will make essential reading for all levels of structural, civil, mechanical and aerospace engineers. The book will be an invaluable aid for all students of structural and civil engineering, from the later years of an undergraduate course through to postgraduate work and the early stages of graduate training within the field.
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Full title:Steel-Concrete Composite Buildings
Author:D. Collings
Publisher: Thomas Telford Ltd
Page Size: 246x189mm
Number of Pages: 240
Description
A concise and accessible guide to the practical and economical design of composite buildings, Steel-Concrete Composite Buildings employs the latest methods as outlined in Eurocodes and includes up-to-date examples of the uses of composite construction in buildings in the UK, US, Asia and other parts of the world.
The book covers a wide range of structures, from simple beam and slab structures through to problems associated with composite construction in high rise structures, and specialist problems such as dynamics. Showing how composite structures may be designed simply from basic concepts without the need for a clause by clause checking of codes and standards, all chapters use real world examples of buildings from around the globe to illustrate design and construction methods. Test results are used extensively to demonstrate the behaviour of the structure being designed, helping to clarify the limitations of the codes.
The essential reference for those engaged in design of composite structures, Steel-Concrete Composite Buildings will provide readers not only with simpler methods for design and construction but also a deeper understanding of these methods and how they are verified against the latest design codes.
Civil and structural engineers worldwide will find this book a timely and highly useful practical guide to this important area of design and construction.
This book is a companion to Steel-Concrete Composite Bridges, also by David Collings.
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We transferred CivilEA to new server, we are extremely sorry for shutting down website suddenly. This was unmanaged issue.
Because of new year holidays we forced to do transferring yesterday by our provider this is why we shut down site without any announcement.
Anyway we hope you accept our apologize for this issue.
You may see some errors in next few days. This is normal. We are working hard to finalize transferring.
Predicting the In-plane Capacity of Masonry Infilled Frames
Author: Charles J. Tucker | Size: 8 MB | Format:PDF | Quality:Unspecified | Publisher: Tennessee Technological University | Year: 2007
Stiffness methods from eighteen sources were investigated. Strength methods from thirteen sources were also investigated. The stiffness equations were compared to the experimental data at the first crack load. The strength equations were compared to the experimental results at the first crack load and the reported ultimate load. The results of these comparisons were used as a starting point for the development of better equations for determining the stiffness and strength of masonry infilled frames.
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Behavior of geosynthetic reinforced soil walls with poor quality backfills on yielding foundations
Author: Saidin Fadzilah | Size: 20 MB | Format:PDF | Quality:Unspecified | Publisher: University of Washington | Year: 2007
This thesis is a study of the behavior of GRS walls with poor quality backfill on yielding foundations with the goal of contributing towards a rational design of these walls. The research consisted of numerical simulation of a GRS wall constructed using poor quality backfill on a compressible foundation. The results were compared to an equivalent full scale instrumented wall. Parametric analyses were performed to study the effect of varying some important parameters on the wall response. The impact of water was studied by modeling the effect of a wetting front advancing into the fill due to infiltration of water through a two-phase flow analysis. Findings from this research show that GRS walls using poor quality backfills on a yielding foundation can be designed using current methods used for granular backfills but adequate provision for drainage is critical. A reinforced base is essential to spread the load onto the yielding foundation. Permeable reinforcements are not effective in reducing the generation of excess pore pressure due to infiltration for backfills compacted dry of optimum.
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ASTM D5777 - 00(2011)e1
Standard Guide for Using the Seismic Refraction Method for Subsurface Investigation
Published : January 2011
This guide summarizes the equipment, field procedures, and interpretation methods used for the determination of the depth, thickness and the seismic velocity of subsurface soil and rock or engineered materials, using the seismic refraction method.
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Computational Mechanics in Structural Engineering : Recent Developments and Future Trends
Author: Franklin Y. Cheng, Zizhi Fu | Size: 12.5 MB | Format:PDF | Quality:Scanner | Publisher: Taylor & Francis | Year: 1991 | pages: 480 | ISBN: 1851668675, 9781851668670
Proceedings of Sino-US Joint Symposium/Workshop on Recent Developments and Future Trends of Computational Mechanics in Structural Engineering, Beijing, China, September 24-28 1991
Table of Contents :
Preface
Opening Remarks p. 1
Resolutions p. 6
Symposium/Workshop Activities p. 6
General Papers
NSF Programs in Computational and Structural Mechanics p. 10
Funding Programs of the Computational Mechanics by National Natural Science Foundation of China (NSFC) p. 27
Partial Differential Equations and Hamiltonian System p. 32
Generalized Optimal Active Control Algorithm of Seismic Structures and Related Soil-Structure Formulation p. 49
Failure Analysis and Finite Elements
Nonlinear Finite Element Algorithms for Massively Parallel SIMD Computers p. 63
Spline Finite Element Method - Recent Developments p. 77
The Ritz-Lanczos Algorithm in Structural Dynamic Analysis p. 91
Rigid Body Criteria in Nonlinear Element Formulation p. 101
Shells and Walls
Shells: Mechanics and Approximation - Linear and Nonlinear Aspects p. 114
Statics, Dynamics and Stability of Shell Structures p. 128
Research on Unreinforced Hollow Clay Tile Walls and Developments of Computational Mechanics p. 140
The Analysis of the Environments and Structures Interaction - Soil-Plate and Shell Interaction p. 154
Structural Control
Active Structural Control for Natural Hazard Mitigation p. 168
Study on Structural Control p. 179
Control of Coupled Bending and Torsional Vibration and Motion of Beams with Shear Effect p. 193
Effects of Flexible Foundation on the Responses of Active Controlled Structures p. 205
Active Control of Base Isolated Structures p. 219
Computational Strategies for Buildings
Substructured Computer-Actuator Hybrid Analysis for Inelastic Earthquake Response of Structures p. 232
Recent Development of 3-Dimensional Analysis of Tall Building Structures by Continuum Method p. 246
Nonlinear Analysis
Nonlinear Modelling and Analysis of Reinforced Concrete Frame Structures p. 260
Mechanical Properties of Plastic Concrete and Nonlinear Structural Analyses of Plastic Concrete Cut-off Wall p. 273
Analyses of Tall Building Structures by the Method of Analytic ODE Solver p. 286
Nonlinear and Postbuckling Analysis of Elastic Frames p. 300
Structural Optimization
Optimum Structural Design under Uncertainties and Imprecisions p. 314
Optimum Earthquake Resistant Design of Plane Frame Structures with Elasto-Plastic Beam p. 326
New System of Earthquake Resistant Structures in Seismic Zone p. 343
Observational Construction Control System for Soil Structures by Computer Network p. 357
Minimum Search for Lagrange Multiplier Method in Constrained Optimization Problems p. 371
Structural Reliability
Computational Damage Analysis and Reliability Assessment p. 381
Dynamic Behavior of Bridges under Random Loading and Dynamic Reliability Problem p. 398
Fuzzy Random Analysis and Design of Engineering Structures p. 412
Supercomputer, CAD and Expert System
Supercomputer Applications p. 423
Some Aspects of R.C. Structure CAD System p. 439
Fuzzy Reasoning and Machine Learning of Expert System for Structural Design p. 450
Index of Contributors p. 465
Table of Contents provided by Blackwell. All Rights Reserved.
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This volume contains forty of the papers presented at the International Conference on 'Mathematics in Transport Planning and Control' which was held at Cardiff University from 1-3 April, 1998. This was the third such conference run under the auspices of the Institute of Mathematics and Its Applications, the first being held at the University of Surrey in 1979, and the second at Cardiff University in 1989. Over fifty papers were submitted for presentation at the conference. It will be clear from the contents that mathematical ideas and methodologies continue to play a prominent part in the description and solution of the many and varied problems that are being currently investigated in quite diverse areas of transport research. Applications will be found on transport planning, congestion, assignment, networks, signalling, road safety, and environmental issues.
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