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we prepared new post generator for our forum,
you can post more easily now,
generate your posr & copy generated code into reply section ....
this is beta version & will be more professional soon....
wait for good news .,,,
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Disaggregated Seismic Hazard and the Elastic Input Energy Spectrum:
An Approach to Design Earthquake Selection
Martin C. Chapman
Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University in partial
fulfillment of the requirements for the degree of
Doctor of Philosophy in Geophysics
J. Arthur Snoke, Chair
Gilbert A. Bollinger
Edwin S. Robinson
James R. Martin
Mahendra P. Singh
June 25, 1998
Blacksburg, Virginia
Keywords: Seismic Hazard, Strong Motion, Design Earthquakes, Input Energy
(Abstract)
The design earthquake selection problem is fundamentally probabilistic. Disaggregation of a probabilistic model of the seismic hazard offers a rational and objective approach that can identify the most likely earthquake scenario(s) contributing to hazard. An ensemble of time series can be selected on the basis of the modal earthquakes derived from the disaggregation. This gives a useful time-domain realization of the seismic hazard, to the extent that a single motion parameter captures the important time-domain characteristics. A possible limitation to this approach arises because most currently available motion prediction models for peak ground motion or oscillator response are essentially independent of duration, and modal events derived using the peak motions for the analysis may not represent the optimal characterization of the hazard.
The elastic input energy spectrum is an alternative to the elastic response spectrum for these types of analyses. The input energy combines the elements of amplitude and duration into a single parameter description of the ground motion that can be readily incorporated into standard probabilistic seismic hazard analysis methodology. This use of the elastic input energy spectrum is examined. Regression analysis is performed using strong motion data from Western North America and consistent data processing procedures for both the absolute input energy equivalent
velocity, (Vea), and the elastic pseudo-relative velocity response (PSV) in the frequency range 0.5 to 10 Hz. The results show that the two parameters can be successfully fit with identical functional forms. The dependence of Vea and PSV upon (NEHRP) site classification is virtually identical. The variance of Vea is uniformly less than that of PSV, indicating that Vea can be predicted with slightly less uncertainty as a function of magnitude, distance and site classification. The effects of site class are important at frequencies less than a few Hertz. The regression modeling does not resolve significant effects due to site class at frequencies greater than approximately 5 Hz.
Disaggregation of general seismic hazard models using Vea indicates that the modal magnitudes for the higher frequency oscillators tend to be larger, and vary less with oscillator frequency, than those derived using PSV. Insofar as the elastic input energy may be a better parameter for
quantifying the damage potential of ground motion, its use in probabilistic seismic hazard analysis could provide an improved means for selecting earthquake scenarios and establishing design earthquakes for many types of engineering analyses.
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in this topic we publish thesis of MSc civil engineering.
This topic open for all registered user temporary & it will be moved to V.I.P section soon, it will be visible fo V.I.P user ....:)
Autodesk AutoCAD Revit Structure Suite 2010 x86 DVD-NoPE | 2.24 GB
Design and shape the world around you with the powerful, flexible features found in AutoCAD design and documentation software, one of the worldÆs leading 2D and 3D CAD tools. Speed documentation, share ideas seamlessly, and explore ideas more intuitively in 3D. With thousands of available add-ons, AutoCAD software provides the ultimate in flexibility, customized for your specific needs. It's time to take design further. It's time for AutoCAD.
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by amildas0
download RSA pro 2010 from autodesk the trial version
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install the software with its trial version using serial of 000-000000
and the product key of 00000(autogenerated as you notice)
after that run the application-copy and paste xforce to the directory click in the mem patch-also run the application type the serial indicated in the xforce there 3 of them choose only 1 no product key to be used beacuse it is autogenerated by the RSA product then thats it
note: in RSA do not follow the instruction provided in xforce follow what i have post because it already proven by amildas0 lastnight
the xforce provided also works with revit Structure 2010 thens thats the time follow the instruction provided in xforce
AutoCAD® Structural Detailing 2010 software, built on the familiar AutoCAD® platform, enhances productivity with more precise detailing and creation of fabrication shop drawings. Help improve accuracy through material-specific bills of quantities and schedules. Automate concrete reinforcement definition and shop drawing creation for various types of structural concrete members. Model steel structures or import CIS/2 files, helping to enable faster and more efficient modeling of steel connections and shop drawings. Streamline the steel fabrication process with links to computer numeric controlled (CNC) machines. Extend design to fabrication with direct integration between Revit® Structure software and AutoCAD Structural Detailing software.
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Product details:
* Paperback: 72 pages
* Publisher: Woodhead Publishing (28 Jan 2005)
* Language English
* ISBN-10: 185573589X
* ISBN-13: 978-1855735897
Rivista Italiana Della Savoatura:
...this publication is extremely important for designers, engineers and all those who work in structural welding.
Product Description:
This contemporary book provides an up-to-date review on the application of ISO and AWS standards and a comparison between them. Many thousands of engineering drawings are currently in use, which have symbols and methods of representation from superseded standards. The current European and ISO standards and the American standard are substantially similar, but the ANSI/AWS standard includes some additional symbols and also symbols for non-destructiv
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This is the first book on rotational effects in earthquakes, a revolutionary concept in seismology. Existing models do no yet explain the significant rotational and twisting motions that occur during an earthquake and cause the failure of structures. This breakthrough monograph thoroughly investigates rotational waves, basing considerations on modern observations of strong rotational ground motions and detection of seismic rotational waves. The rotational effects are observed first of all near the earthquake sources, but not only; they also appear near seismic stations on account of the properties of media through which the waves propagate. To describe the propagation of such waves, the authors consider structured elastic media that allow for rotational motions and rotational deformations of the ground, sometimes stronger than translational deformations. The rotation and twist effects are investigated and described and their consequences for designing tall buildings and other important structures are presented. The book will change the way the world views earthquakes.
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