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  Encyclopedia of Earthquake Engineering
Posted by: pezhmankhan - 07-04-2013, 06:08 AM - Forum: Books and Codes Request - Replies (1)

  • Article/eBook Full Name: Encyclopedia of Earthquake Engineering
  • Author(s): Beer, M.; Kougioumtzoglou, I.A.; Patelli, E.; Au, I.S.-K. (Eds.)
  • ISBN: 978-3-642-35344-4
  • Published By: Springer
  • Related Links:

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  Deep Condolence to the Victims of The Central Aceh Earthq 2/7/13
Posted by: Sumatra - 07-04-2013, 04:57 AM - Forum: Free Discussion - No Replies

I sincerely expressed my deep condolence to the victims of the Central Aceh earthquake (2/7/2013) in the central of northern Sumatra region, Indonesia.

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  Minimization of welding distortion and buckling , Modelling and implementation
Posted by: fred2010 - 07-03-2013, 08:44 PM - Forum: Mechanics & Material Technology (Elasticity, Plasticity and Nonlinearity) - No Replies

Minimization of welding distortion and buckling , Modelling and implementation

Author: Pan Michaleris | Size: 15 MB | Format: PDF | Quality: Original preprint | Publisher: Woodhead Publishing | Year: 2011 | pages: 315 | ISBN: 978-1-84569-662-7

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Part I Understanding welding residual stress and
distortion
1 Introduction to welding residual stress and
distortion 3
P. Michaleris, Pennsylvania State University, USA
1.1 Types of welding distortion 3
1.2 Formation of welding distortion 4
1.3 Distortion control methods 10
1.4 Book outline 20
1.5 References 20
2 Understanding welding stress and distortion using
computational welding mechanics 22
L.-E. Lindgren, Luleå University of Technology, Sweden
2.1 Introduction 22
2.2 The Satoh test 22
2.3 Thermomechanical analysis of welding problems 26
2.4 Eulerian and Lagrangian reference frames 29
2.5 Nonlinear heat conduction 31
2.6 Nonlinear deformation 36
2.7 Finite-element techniques in computational welding
mechanics (CWM) 41
2.8 Heat input models 46
2.9 Material models 58
2.10 References 66
3 Modelling the effects of phase transformations on
welding stress and distortion 78
J. A. Francis and P. J. Withers, University of Manchester,
UK
3.1 Introduction 78
3.2 Types of transformation 79
3.3 Transformation strains 84
3.4 Equilibrium phase diagrams 86
3.5 Continuous cooling transformation (CCT) diagrams 89
3.6 Signifi cance of transformation temperature 91
3.7 Metallurgical zones in welded joints 92
3.8 Effects of phase transformations on residual stresses in
welds 93
3.9 Transformation plasticity 95
3.10 Current status of weld modelling 95
3.11 References 97
4 Modelling welding stress and distortion in large
structures 99
L. Zhang, Link-Belt Construction Equipment, USA
4.1 Introduction 99
4.2 Three-dimensional applied plastic strain methods 100
4.3 Application on a large structure 112
4.4 Conclusions 122
4.5 References 122
5 Using computationally effi cient, reduced-solution
methods to understand welding distortion 124
T. G. F. Gray, University of Strathclyde, UK and
D. Camilleri, University of Malta, Malta
5.1 Introduction 124
5.2 Context and rationale for reduced-solution methods 125
5.3 Computationally effi cient solutions based on mismatched
thermal strain (MTS) and transverse contraction strain
(TCS) algorithms 130
5.4 Verifi cation of MTS and TCS algorithms 135
5.5 Multiple welds 140
5.6 Fillet welds 144
5.7 Hybrid and stepwise strategies 147
5.8 Selected case studies 151
5.9 Future trends 160
5.10 Sources of further information and advice 163
5.11 References 164
Part II Minimizing welding distortion
6 Minimization of bowing distortion in welded
stiffeners using differential heating 169
M. V. Deo, Cummins Inc., USA
6.1 Introduction 169
6.2 Welding-induced residual stress and bowing distortion 170
6.3 Mitigation of welding-induced bowing distortion 172
6.4 Experimental verifi cation of transient differential heating 174
6.5 Results 178
6.6 Conclusions 183
6.7 References 184
7 Minimizing buckling distortion in welding by thermal
tensioning methods 186
W. Li, The University of Texas at Austin, USA and J. Xu,
Strategic Global Sourcing, USA
7.1 Introduction 186
7.2 A simplifi ed fi nite-element model 187
7.3 The dynamic thermal tensioning method 195
7.4 Mitigating buckling distortion using the dynamic thermal
tensioning method 205
7.5 Conclusions 210
7.6 References 211
8 Minimizing buckling distortion in welding by weld
cooling 214
J. Li, Beijing Aeronautical Manufacturing Technology
Research Institute, China and Q.-Y. Shi, Tsinghua
University, China
8.1 Introduction 214
8.2 Welding with intensive trailing cooling, the dynamically
controlled low-stress no-distortion (DC-LSND) method 215
8.3 Mechanism of the DC-LSND method 226
8.4 Limitations and industry application 237
8.5 Conclusions 239
8.6 References 240
9 Minimizing buckling distortion in welding by hybrid
laser-arc welding 241
S. M. Kelly, R. P. Martukanitz and E. W. Reutzel,
Pennsylvania State University, USA
9.1 Introduction 241
9.2 Laser beam welding 242
9.3 Hybrid laser-arc welding (HLAW) 246
9.4 Hybrid laser-arc welding for reducing distortion in marine
construction 247
9.5 Conclusions 268
9.6 References 270
10 Minimizing angular distortion in welding by
reverse-side heating 273
M. Mochizuki, Osaka University, Japan
10.1 Introduction 273
10.2 Experimental 274
10.3 Mechanism of reduction in welding distortion 277
10.4 Conclusions 285
10.5 Acknowledgments 285
10.6 References 286

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  The Sustainable Use of Concrete
Posted by: ir_71 - 07-02-2013, 04:43 PM - Forum: Concrete - Replies (1)

The Sustainable Use of Concrete

Author: Koji Sakai, Kagawa University, Japan; Takafumi Noguchi | Size: 15.04 MB | Format: PDF | Quality: Original preprint | Publisher: CRC Press | Year: 2012 | pages: 170 | ISBN: 9780203817179

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Cement-based concrete has excellent properties as a construction material, and the raw materials of cement—rocks, and limestone and clay—are bountiful. Yet its production generates high quantities of CO2, making it a potentially unsustainable material. However, there are no alternatives to concrete and steel as basic methods for development of socioeconomic infrastructure at this time. Highlighting sustainability issues in the construction industry, The Sustainable Use of Concrete presents guidelines on how to move toward sustainable concrete construction.
The book begins by clarifying the historic background and meaning of sustainability, after which it outlines areas that need to be considered in connection with sustainability in the concrete and construction field. It examines environmental, social and cultural, and economic aspects, then considers an evaluation system of sustainability. The authors include various tools and ISO standards, and then explore technologies for sustainability, with case studies and examples that promote understanding of current technologies.
Although the construction sector, in the broadest sense, has come to recognize that infrastructure development over the past two centuries has been unsustainable, it has been slow to adjust. Comprehensive information and relevant practical guidance are very scarce. This book lays out a roadmap for creating a human-friendly and safe environment with low environmental burden.

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  A general solution to vibrations of beams on variable winkler elastic foundation
Posted by: arshiakh - 07-02-2013, 04:15 PM - Forum: Journals, Papers and Presentations - No Replies

A general solution to vibrations of beams on variable winkler elastic foundation

Author: Ding Zhou | Size: 583 KB | Format: PDF | Quality: Unspecified | Publisher: Computers & Structures(Elsevier) | Year: 1993 | pages: 83-90 | ISBN: ---


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A general solution to vibrations of beams on variable Winkler elastic foundation is presented. The exact solution of the dynamic response of the beam is obtained by considering the reaction force of the foundation on the beam as the external force acting on the beam, which is an integral equation including the displacement of the beam. The four unknown constants in the solution are decided by the boundary conditions of the beam. The integrals in the solution are approximately and numerically calculated by means of the trapezoidal rule. By letting the right-hand side of the solution equal its left-hand side only at those discrete nodes of the quadrature, the frequency equation is obtained which is described by a determinant whose order is equal to the number of the discrete nodes. The mode shape functions are represented by a series of unified analytical functions. The analysis and programing are very simple. It is possible to find the natural frequencies and mode shapes of vibrations by using a small number of the discrete nodes in the trapezoidal quadrature and it is concluded that the use of the method yields better convergence at lower computation costs. Finally, several examples are given for simply supported beams on variable Winkler elastic foundation.

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  AASHTO Road Side Design Guide
Posted by: Immelmann - 07-02-2013, 02:20 PM - Forum: Archive - No Replies

Someone can help me to find the AASHTO Road Side Design Guide??
Thanks a lot!

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  Manual for the geotechnical design of structures to Eurocode 7 (2013)
Posted by: albani - 07-02-2013, 11:08 AM - Forum: Archive - Replies (2)

If anyone has the book from the link below please share

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Contents of the book
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Sample pages of the book
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  ASCE Paper request
Posted by: kuyasipil - 07-02-2013, 09:10 AM - Forum: Archive - Replies (2)

Dear Forum member, need your help to upload paper from ASCE library, thank you for your kindness.

1. Ramalho-Ortigao, Werneck, L.G. and Lacerda, W.A. (1983) Embakment failure on clay near Rio de Janeiro. ASCE Journal of Geotechnical Engineering,109(11):1460-1479.

2. Indraratna, B., Balasubramaniam, A.S. and Balachandran, S. (1992) Performance of test embankment constructed to failure on soft marine clay. ASCE Journal of Geotechnical Engineering, 118(1): 12-33

3. Leonards, G. A., (1982). “Investigation of failures.” J. Geotech. Eng. Div., ASCE, 108(2), 185–246

4. Tiwari, B., Brandon, T. L., Marui, H., and Tuladhar, G. R., (2005). “Comparison of residual shear strengths from back-analysis and ring shear tests of undisturbed and remolded specimens.” J. Geotech. Geoenviron. Eng, ASCE., 131(9), 1071–1079.

5. Olsen, R. E., (1974). “Shearing strength of kaolinite, illite, and montmorillonite.” J. Soil Mech. And Fdn. Div., 100(GT11), 1215-1229

6. Majano, R. E., O’Neill, M. W., and Hassan, K. M. (1994). ‘‘Perimeter load transfer in model drilled shafts formed under slurry.’’ J. Geotech. Eng., 120(12), 2136–2154.

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  Groundwater Lowering in Construction: A Practical Guide to Dewatering, Second Edition
Posted by: ir_71 - 07-01-2013, 06:43 PM - Forum: Water & Hydraulic Engineering - Replies (3)

Groundwater Lowering in Construction: A Practical Guide to Dewatering, Second Edition

Author: Pat M. Cashman and Martin Preene | Size: 87.20 MB | Format: PDF | Quality: Original preprint | Publisher: CRC Press | Year: 2012 | pages: 645 | ISBN: 9780415668378

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Linking theory and application in a way that is clear and understandable, Groundwater Lowering in Construction: A Practical Guide to Dewatering, Second Edition uses the authors’ extensive engineering experience to offer practical guidance on the planning, design, and implementation of groundwater control systems under real conditions.

Discover engineering methods that can help you improve working conditions, increase project viability, and reduce excavation costs.

In the decade since publication of this book’s first edition, groundwater lowering and dewatering activities have been increasingly integrated into the wider ground engineering schemes on major excavations to help provide stable and workable conditions for construction below groundwater level. Consequently, many engineering ventures now require a more in-depth assessment of potential environmental impacts of dewatering and groundwater control, and this book details the latest best practices to evaluate and address them.

Includes New Chapters Covering:

- Cutoff methods used for groundwater exclusion
- Issues associated with permanent or long-term groundwater control systems
- Groundwater control technologies used on contaminated sites
- Methods needed to understand, predict, and mitigate potential environmental impacts of groundwater control works
Updated to reflect the crucial technological and application advances shaping construction processes, this book contains valuable direction that can give you a true competitive advantage in the planning and execution of temporary and permanent dewatering works. The authors cover cutting-edge methods and key subjects, such as the history of dewatering, working on contaminated sites, site investigation techniques, and operation and maintenance issues, including health, safety, and legal aspects. Written for practising engineers and geologists as well as postgraduate engineering students, this updated manual on design and practice provides numerous case histories and extensive references to enhance understanding.

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  Quality Tools for Managing Construction Projects
Posted by: ir_71 - 07-01-2013, 03:23 PM - Forum: Project Management - Replies (4)

Quality Tools for Managing Construction Projects

Author: Abdul Razzak Rumane, Director, Construction Quality Management, Dar Alkuwait Alkhaleejia for Consultation and Training, Kuwait | Size: 3.89 MB | Format: PDF | Quality: Original preprint | Publisher: CRC Press | Year: 2013 | pages: 413 | ISBN: 9781466552142

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Dealing with such a multi-layered and fungible intangible as quality during the design and construction process is difficult for all parties involved. To the architect, quality means an appealing and enduring design, but to the builder, it means understandable documents that, when acted upon, lead to an enduring, well-made structure. To the owner, it is the end result: a building that is not only fit for the purpose, but a positive addition to its surroundings. Reconciling these seemingly contrasting priorities requires processes that are embedded not just at the project level, but within the entire enterprise with designer, builder, and owner committed to integrating quality into all their business processes.

Quality Tools for Managing Construction Projects not only details the importance of developing a comprehensive management system, but provides the tools and techniques required to do so. The book examines the usage and applications of tools and techniques in different phases of a construction project, focusing on plan quality, quality assurance, and quality control. Following the construction cycle, Dr. Rumane delineates the quality tools and their application, ending with the implementation of quality systems throughout the entire design and construction cycle.
The book demonstrates how these tools can help in planning, executing, monitoring, and controlling a project—evolving project management into a system that ensures project deliverables consistently meet the defined scope on schedule and within budget. The author’s systems perspective recognizes and supports the ideal collaborative approach that modern design and construction projects need. Dr. Rumane then demonstrates that successful quality management is more than a series of handoffs between teams who’ve completed tasks.

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