SUMMARY
Proceeding on the assumption that the seismic noise wavefield mainly consists of surface waves generated by a random distribution of independent, point-like and harmonic sources, we modelled a set of relationships that allows us to interpret empirical H/V and apparent dispersion curves in terms of the dynamic properties of a viscoelastic layered Earth. This formalization can be used to determine the effect of material damping on the expected noise wavefield in cases where the sources are relatively distant from the receivers and where the frequencies taken into account are higher than the fundamental resonance frequency of the local subsoil. Numerical experiments indicate that such effects are significant on the H/V ratio curve, whereas the apparent dispersion curve appears to be less strongly influenced by damping. This finding opens new perspectives for the use of noise measurements to infer the in situ anelastic properties of subsoil from passive seismic measurements made at the surface.
Paper + Errata
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Geophysical Journal International
On the seismic noise wavefield in a weakly dissipative layered Earth
Enrico Lunedei,Dario Albarello
Volume 177, Issue 3, pages 1001–1014, June 2009
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Corrected by:
Erratum
Geophysical Journal International
Volume 179, Issue 1, page 670, October 2009
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Posted by: David90 - 04-20-2012, 08:02 AM - Forum: Archive
- No Replies
Title: ANSI A58.1 Minimum Design Loads for Buildings and Other Structures
Publisher: American National Standards Institute
Year: 1982
Language: English
Posted by: David90 - 04-20-2012, 07:56 AM - Forum: Archive
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I need parts of 1994 UBC that are chapter Reinforced Concrete & Wind Load only
Please help me.
Info about 1994 UBC
Title: Uniform Building Code 1994
Publisher: International Conference of Building Official
ISBN-10: 1884590438
ISBN-13: 978-1884590436
Year: July 1994
Language: English
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Author: Jens Pohl | Size: 67,6 MB | Format:PDF | Quality:Unspecified | Publisher: John Wiley and Sons Ltd | Year: 2011-03-15 | pages: 280 | ISBN: 0470655739
With the improved efficiency of heating, cooling and lighting in buildings crucial to the low carbon targets of all current governments, Building Science: Concepts and Applications provides a timely and much-needed addition to the existing literature on architectural and environmental design education. Taking a logical and didactic approach, the author introduces the reader to the underlying concepts and principles of the thermal, lighting, and acoustic determinants of building design in four integrated sections.
The first section explores the thermal building environment and the principles of thermal comfort, translating these principles into conceptual building design solutions. The author examines the heat flow characteristics of the building envelope and explains steady state design methods that form the basis of most building codes. He discusses the sun as a natural heat source and describes the principles of active and passive solar building design solutions.
The second section introduces the scientific principles of light, color, and vision, stressing the importance of daylight in building design, presenting the Daylight Factor design concept and methodology, and discussing glare conditions and their avoidance. It also addresses artificial lighting, delving into the prominent role that electricity plays in the production of light by artificial means and comparing the efficacy and characteristics of the various commercially available light sources in terms of the energy to light conversion ratio, life span, available intensity range, color rendition properties, and cost.
The third section deals with the various aspects of sound that impact the design of the built environment, discussing the nature of sound as a physical force that sets any medium through which it travels into vibration and laying the foundations for the treatment of sound as an important means of communication as well as a disruptive disturbance.
The final section discusses the foundational concepts of ecological design as a basis for addressing sustainability issues in building design solutions. These issues include the embedded energy of construction materials, waste management, preservation of freshwater and management of graywater, adoption of passive solar principles, energy saving measures applicable to mechanical building services, and the end-of-lifecycle deconstruction and recycling of building materials and components.
Covers the fundamental building science topics of heat, energy, light and sound
Takes a logical and didactic approach, tracing the historical roots of building science
Includes summaries of new technologies in solar energy and photovoltaic systems
Features a section on the principles of sustainable architecture
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Content:
Lecture 1: SDOF
Lecture 2: MDOF
Lecture 3: Earthquake Analysis, Design, and Safety Evaluation of Concrete Gravity Dams.
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Title Structural bearings. Transport, storage and installation
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I need following paper:
Title: Dynamic analyses of isolated structures under bi-directional excitations of near-field ground motions
Journal: Shock and Vibration
DOI: 10.3233/SAV-2011-0646
- Aesthetically Attractive
- Excellent Strength Properties
- Use of Internal Void
- Corrosion Protection
- Lower Resistance for Water and Wind Loading
- Lighter Designs
- Various Other Special Properties
- Higher Unit Material Costs
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