Wind-induced pressures acting on the Wind Engineering Research Field Laboratory
(WERFL) of Texas Tech University are integrated over each surface to obtain three
forces and moments at the base of the building along the three principal axes with its
origin at the geometric center of the building. Mean and fluctuating pressure
distributions around the WERFL building are investigated, and the pressure
distributions producing maximum fluctuating along-wind loading, across-wind
loading, and torsional moment are studied, and the correlation between these forces is
studied, a method to investigate the load combination of these forces is proposed.
WERFL building is also used for estimation of wind loading effects and
corresponding gust response factors and background factors, and a wind tunnel model
of Tokyo Polytechnic University is also utilized. The gust factors and back ground
factors of responses of these two buildings under wind loading are calculated
respectively. The responses calculated by pressure time histories are compared to
those calculated by applying ASCE7-05. Methods to investigate universal equivalent
static wind load are applied to both buildings. Several equivalent static wind loading
(ESWL) methods are compared, and the universal ESWL method is applied to
WERFL building and another modified universal ESWL method is also utilized for
WERFL building.
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TABLE OF CONTENTS
1. SUMMARY OF CALCULATIONS........................................................................................... 4
1.1 CHANGES IN REVISION ................................................................................................... 4
1.2 EFFECT OF INCREASED RUBBER SHEAR MODULUS...................................................................... 4
1.2.1 ISOLATION SYSTEM DISPLACEMENTS AND FORCES............................................................. 4
1.2.2 DYNAMIC PROPERTIES AND DAMPING ........................................................................... 5
1.2.3 TEST CONDITIONS.................................................................................................. 5
2. PROJECT REQUIREMENTS ................................................................................................... 7
2.1 REFERENCES................................................................................................................. 7
2.2 DESIGN CONDITIONS..................................................................................................... 7
3. PROCEDURES USED FOR BEARING DESIGN.......................................................................... 9
3.1 DEFINITIONS ................................................................................................................ 9
3.2 CALCULATION OF EQUIVALENT SHEAR STRAINS ..................................................................... 10
3.3 LIMITING STRAIN CRITERIA............................................................................................... 11
3.3.1 AASHTO LIMITING STRAIN CRITERIA........................................................................... 11
3.4 VERTICAL LOAD STABILITY ................................................................................................ 11
3.4.1 AASHTO VERTICAL LOAD STABILITY ............................................................................ 11
3.5 AASHTO LATERAL RESTORING FORCE ................................................................................ 13
3.6 LATERAL STIFFNESS PARAMETERS FOR BEARING....................................................................... 13
3.7 SYSTEM PROPERTY MODIFICATION FACTORS......................................................................... 15
3.7.1 AGE CHANGE IN PROPERTIES ................................................................................... 16
3.7.2 TEMPERATURE CHANGE IN PROPERTIES......................................................................... 17
3.7.3 MODIFICATION FACTORS USED FOR DESIGN................................................................. 17
4. BEARING DESIGN CALCULATIONS.................................................................................... 19
4.1 ANALYSIS RESULTS USED FOR ISOLATION SYSTEM DESIGN......................................................... 19
4.2 DESIGN LOADS ........................................................................................................... 20
4.3 MATERIAL PROPERTIES .................................................................................................... 20
4.4 BEARING SHAPE .......................................................................................................... 20
4.5 BEARING DIMENSIONS.................................................................................................. 21
4.6 BEARING PROPERTIES..................................................................................................... 22
4.7 LIMITING STRAIN CALCULATIONS ...................................................................................... 23
4.7.1 AASHTO CRITERIA ............................................................................................... 23
4.7.1.1 AASHTO Equation 25 ............................................................................................................. 23
4.7.1.2 AASHTO Equation 26 ............................................................................................................. 24
4.7.1.3 AASHTO Equation 27 ............................................................................................................. 24
4.8 VERTICAL LOAD STABILITY ................................................................................................ 25
4.8.1 AASHTO REQUIREMENTS ....................................................................................... 25
4.9 RESTORING FORCE....................................................................................................... 26
4.10 EFFECTIVE STIFFNESS AND DAMPING .............................................................................. 27
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Contents of Midas Gen Advanced Webinar - Dynamic Analysis Time History(27 Nov 2012)
1. Seismic Design for New Buildings
2. Seismic Design for Existing Buildings
3. Base Isolators and Dampers
4. Mass
5. Damping
6. Modal Analysis
7. Fiber Analysis
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This European Standard EN 1993-1-12, “Eurocode 3: Design of steel structures: Part 1-12: Additional rules for the extension of EN 1993 up to steel grades S 700”, has been prepared by Technical Committee CEN/TC250 « Structural Eurocodes », the Secretariat of which is held by BSI. CEN/TC250 is responsible for all Structural Eurocodes.
This European Standard shall be given the status of a National Standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting National Standards shall be withdrawn at latest by March 2010.
According to the CEN-CENELEC Internal Regulations, the National Standard Organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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I opened this topic to ease the search for appropriate translation or meaning of English words and phrases.
Best regards,
Grunf
Can someone describe or show by picture meaning of phrase "mat caisson foundation"
Croatian speaking users can send me the translation using PM system. I'm reading some article, not having any picture shoving structure nor foundation and there is just one sentence saying "Foundation of structures is mat caisson foundation with
4.1m thickness".
I know the meaning of separated words, but not the meaning of the whole phrase as this is not the area I'm involved much.
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Boundaries of Rock Mechanics: Recent Advances and Challenges for the 21st Century
Author: Meifeng Cai, Jin'an Wang | Size: 40.5 MB | Format:PDF | Quality:Scanner | Publisher: Taylor & Francis | Year: 2008 | pages: 1008 | ISBN: 0415469341
This volume offers an overall understanding of current concerns and advances in rock mechanics, and will be of interest to professionals, engineers and academics involved in rock mechanics and engineering.Boundaries of Rock Mechanics. Recent Advances and Challenges for the 21st Century contains 180 papers from the International Young Scholars' Symposium on Rock Mechanics 2008 (Beijing, China, 28 April-2 May 2008). The symposium was organized by the ISRM Commission on Education, and sponsored by the International Society for Rock Mechanics (ISRM) and the Chinese Society for Rock Mechanics and Engineering (CSRME).
Boundaries of Rock Mechanics. Recent Advances and Challenges for the 21st Century covers a variety of topics, grouped into 7 main themes:
* Field investigation and instrmentation
* Rock properties and mechanical behavior
* Underground mining and excavation engineering
* Rock slopes and landsides
* Tunnels and foundations
* Dynamics and blasting
* New techniques and methods
This volume offers an overall understanding of current concerns and advances in rock mechanics, and will be of interest to professionals, engineers and academics involved in rock mechanics and engineering.
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