Recent years have seen great expansion of the tall building industry, even in areas characterized by high seismicity. The structural systems that are usually adopted in tall buildings and the seismic response that they exhibit can differ substantially from those characterizing low-rise construction. Seismic codes, though, are typically envisaged for the design of traditional structural systems, and are not able to take into account some peculiar characteristics of tall buildings. Recognizing such issues, and to overcome the inappropriate prescriptions that traditional seismic codes impose on the design of modern tall buildings, alternative design procedures have become more acceptable in recent years. These innovative approaches to tall building design are referred to as performance-based design methods. This research focuses on a specific and increasingly common category of high-rise buildings, in which the main lateral resisting system is offered by cantilevered and/or coupled RC walls, and proposes a seismic design procedure which is particularly suited for inclusion in any performance-based design framework. The whole body of this study can be divided into three different activities: (i) development of a methodology for the prediction of the inelastic seismic displacement response of medium and long period SDOF systems, (ii) investigation of the ductile response of higher modes of vibration and formulation of recommendations for estimating higher mode ductile response with equivalent linear systems, and (iii) development of a displacement-based design procedure for tall RC wall buildings which takes into account higher mode drift and seismic force demand amplification by rational means, developing closed form expressions based on first principles. Limitations, sources of uncertainties and possible extension of the proposed performance-based methodologies to frames and dual systems are also discussed. Thanks to the research presented in this report, the first author was awarded with the ³special mention² in the 2011 fib Achievement Award for Young Engineers ¬ Research Category. Fib (federation internazionale du beton) is the International Federation for Structural Concrete and its Achievement Award for Young Engineers - Research Category - is given every two years and recognises an outstanding contribution to structural concrete in the field of research.
Author: P. E. (Author), Giannini (Author), R. & Franchin (Author), P. Pinto (Author), IUSS Press (Editor) | Size: ? MB | Format:PDF | Quality:Unspecified | Publisher: IUSS Press | Year: 2004 | pages: 370 | ISBN: 8873580173-978-8873580171
In the broad area of structural engineering design for earthquake resistance is the sector where recourse to reliability concepts represents not just a refinement but a necessity. A background in probability theory is a prerequisite for the very understanding of terms like average return period, uniform hazard spectrum, and many others that are common in design practice. Looking in perspective, there is a clear trend of the new generation of design codes to set the objectives of the design in terms of the fulfilment of a number of performance levels, whose measure of achievement is quantified by a probability. A sound basis on the theory of probability, on that of stochastic processes and random vibrations, and on the methods that allow probabilities of exceedance of specified levels of response to be evaluated, is becoming a requirement for a correct use of the codes. The aim of this self-contained book is to provide the fundamental theoretical bases and to present the state of the art in the field of the methods for the probabilistic evaluation of seismic performance. The book contains four main chapters and two appendices, the latter ones being devoted to a succinct exposition of the theories of probability and stochastic processes, respectively. The content of the appendices has been selected primarily in order to provide full support for the material in the body of the book, though without compromising certain requisites of rigour and completeness.
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"Slender Plate Girders Subjected to Edge Loading" by TM Roberts, ICE Proceedings, Volume 71, Issue 3, September 1981.
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By using this code you can do any kind of static analysis on
Beam , Truss , Frame of 2 & 3 Dimensions .
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Hi guys, I'm using this code to do a modal analysis on a 3D-frame with braces, please if you could help me to add the Mass matrix calculations to this code (by considering member releases at the ends of braces) I'd be really grateful.
Posted by: giguni - 06-06-2012, 10:30 AM - Forum: Archive
- No Replies
Effects of the near-field on shallow seismic studies
Maria-Daphne Mangriotis,James W. Rector III and E. Frederick Herkenhoff
Geophysics January 2011 v. 76 no. 1 p. B9-B18
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Alkali-Aggregate Reaction and Structural Damage to Concrete: Engineering Assessment, Repair and Management
Author: Geoffrey E. Blight, Mark G. Alexander | Size: 6.2 MB | Format:PDF | Quality:Original preprint | Publisher: CRC Press | Year: 2011 | pages: 250 | ISBN: 0415613531
Since AAR was first identified in 1940, it has been a subject dominated by studies of the mineralogy of AAR-susceptible aggregates, the chemistry of the AAR and related reactions and laboratory tests used to diagnose AAR and predict potential future swelling. Civil and structural engineers have found the literature bewildering and difficult to apply to their immediate requirements of assessing the present and future effects of AAR on the strength, safety and serviceability of plain and reinforced concrete structures.
The book discusses methods that can be used for laboratory destructive and in situ non-destructive testing to assess the effects of AAR, and in-service measurements and load-testing to assess the present and future safety of reinforced concrete structures. Methods of repair and rehabilitation and their long-term success are discussed, as are methods of halting or slowing the progress of AAR. At the same time, the fundamentals of AAR are explained in terms intelligible to the civil and structural engineer who is primarily trained in structural mechanics and design, but also needs to have a basic understanding of the AAR process and its effects on concrete.
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Anyone have any file in SAP2000, robot, etc calculation of a structure of a four-story building designed in cold formed steel.
I design the floor with two options, the floor like a steel deck, and the second one using OSB panels.
Please help me.
Vic
Posted by: mybest - 06-05-2012, 10:53 AM - Forum: Archive
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Dear friend. I really need this book.
I hope someone can share this book.
Steel Design Handbook: LRFD Method
Author: Akbar R. Tamboli | Size: ? MB | Format:PDF | Quality:Unspecified | Publisher: McGraw-Hill Companies | Year: November 1, 1996 | pages: 816 | ISBN: 978-0070614000
Load Resistance Factor Design (LRFD) is the current specification recommended by the Amercian Institute of Steel Construction (AISC) for designing steel structures. This handbook offers structural engineers the latest LRFD AISC specifications that are now replacing ASD specification. A CD-ROM is included offering six interactive examples of key topics in the book. It includes special design methods dealing with vibrations due to foot falls, exercize halls and stadiums, and presents new material on fracture and fatigue design as well as torsion problems.
Definitive, up-to-date information on LRFD! The most comprehensive, up-to-date LRFD (Loaded Resistance Factor Design) handbook available, this leading work in the field shows you how to realize the full potential of this method for designing steel structures to the latest AISC specifications. Written by top engineers, this reference provides a wealth of LRFD examples that can be used in your day-to-day practice. You'll find comprehensive coverage of: The latest LRFD methods; Practical pointers for early planning of buildings and consideration of load factors; Special methods for analyzing and controlling vibrations in structures from gyms to surgical suites; Torsion design by example; Design methods with tension and compression; Steep bridge design approach by new AASHTO LRFD specifications; Improved methods of structural analysis with limit state idealization; New welding techniques for seismically resistant structures; Quality control, inspection, and fabrication methods; Design details on a variety of practical connections; A CD-ROM with 6 design examples is included with the book. This state-of-the-art Handbook includes the latest LRFD AISC specifications--introduced in 1986 and revised in December 1993--now replacing the older ASD specifications.
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