info:
Thanks a lot karla for starting this new topic.
I´d like to share an alternative for your Steel Shapes Blocks, using a LISP to drawing parametric 2D and 3D Shapes. This lisp is royalties free and originally posted in Cadalyst Magazine.
I tested in AutoCAD 2002 to 2008 and works well.
The Info: (same as STL_help.txt file inside):
COMPANION FILES:
^^^^^^^^^^^^^^^^^^^^^
STL.LSP HAS 22 COMPANION FILES THAT ARE REQUIRED TO BE IN THE SAME DIRECTORY IN ORDER TO FUNCTION. THESE FILES ARE NAMED AS FOLLOWS:
STL.DCL, STL_HELP.TXT, STL_C.DIM, STL_HP.DIM, STL_L.DIM, STL_M.DIM, STL_MC.DIM, STL_MET_A.DIM, STL_MET_C.DIM, STL_MET_R.DIM, STL_MET_W.DIM, STL_MT.DIM, STL_P.DIM, STL_PX.DIM, STL_PXX.DIM, STL_S.DIM, STL_ST.DIM, STL_TS_RECT.DIM, STL_TS_SQ.DIM, STL_TUBE.DIM, STL_W.DIM, STL_WT.DIM.
THESE FILES CONTAIN THE DIALOG (.DCL) CODE, THIS HELP FILE (.TXT) AND THE DATA TABLES FOR SHAPE DIMENSIONS (.DIM).
1. ABOUT THE PROGRAM:
^^^^^^^^^^^^^^^^^^^^^^^
A. ALL SHAPES ARE DRAWN AS POLY-LINES FOR EASE OF HANDLING, EXTENDING TO, TRIMMING TO, CHANGING LINETYPE OF, REGION MODELING FOR COMPOSITE SHAPE ANALYSIS, AND CONVERTING TO 3D SOLID AND 3D SIMPLE. INCLUDES AUTOMATIC "PLINEWID" SETTING TO "0", THEN RE-SET TO ORIGINAL SETTING.
B. INSERT POINTS ARE TOP BEAM CENTER, TOP TUBE CENTER, PIPE OR TUBE CENTER, ANGLE HEEL, AND CHANNEL HEEL.
C. SHAPE CONTOURS ARE DRAWN ACCURATELY WITH TAPERED FLANGES AND RADIUSED CORNERS AND EDGES.
D. THE PROGRAM SETS AN AUTOMATIC "OSMODE" SETTING OF "111" (INTERSECTION, ENDPOINT, MIDPOINT, CENTERPOINT, NODE, AND INSERTION) TO AID IN SELECTING INSERT POINT, AUTOMATIC RE-SET TO "0" FOR DRAWING THE SHAPE, THEN RESET TO ORIGINAL OSMODE OF DRAWING ENVIRONMENT.
E. INSERT PROMPT HAS A REFERENCE OPTION. THIS ALLOWS PLACEMENT OF INSERT POINT BY "PICKING" A BASE POINT AND THEN ENTERING ITS X,Y REFERENCE TO THE "PICKED" BASE POINT.
F. PROGRAM DRAWS ALL OF THE STRUCTURAL SHAPES, PIPE, AND TUBE LISTED IN THE AMERICAN INSTITUTE OF STEEL CONSTRUCTION'S (AISC) STEEL CONSTRUCTION MANUAL, EITHER THE ASD NINTH EDITION OR THE LRFD FIRST EDITION. METRIC SHAPE DATA TABLES WERE OBTAINED FROM BEAM.LSP BY STEVE Q. STAPLETON AND BILL LE COUTEUR.
G. THE PROGRAM ALTERS THE DRAWING ENVIRONMENT WITH A TEMPORARY "OSMODE" "111" AND "PLINEWID" "0" SETTING. SHAPES ARE DRAWN ON THE CURRENT LAYER AND UCS.
H. IF YOU MAKE IMPROVEMENTS, HAVE COMMENTS, OR FIND BUGS, PLEASE CONTACT ME BY E-MAIL: [email protected]
2. LOADING AND STARTING THE PROGRAM:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
A. FIRST, ALL STL FILES SHOULD BE LOCATED IN THE SAME DIRECTORY. THE DIRECTORY SHOULD BE SPECIFIED IN THE AUTOCAD SEARCH PATH. MY PERSONAL APPROACH IS TO PUT ALL MY CUSTOM AUTOLISP FILES IN A DIRECTORY CALLED AUTOLISP WHICH I THEN ADD TO MY AUTOCAD SEARCH PATH. THIS KEEPS THEM SEPARATE FROM ALL THE ONES SUPPLIED WITH AUTOCAD IN THE SUPPORT DIRECTORY.
B. LOADING CAN BE DONE BY VARIOUS MEANS DEPENDING ON HOW FREQUENTLY YOU EXPECT TO USE THE PROGRAM. FOR INFREQUENT USE, THE "LOAD APPLICATION" MENU ON THE "TOOLS" PULL-DOWN (R13 AND R14) MAY SUFFICE. YOU CAN ALSO LOAD DIRECTLY AT THE COMMAND PROMPT BY TYPING (LOAD "STL") AND PRESSING ENTER. FOR FREQUENT USERS WHO WANT THE PROGRAM AVAILABLE AT ALL TIMES, ADD (LOAD "STL") TO YOUR ACAD.LSP FILE SO THAT THE PROGRAM LOADS AUTOMATICALLY EVERY TIME. YOU CAN THEN START THE PROGRAM BY TYPING STL AT THE COMMAND PROMPT OR BY CONFIGURING A CUSTOM TOOLBAR BUTTON TO START. MY PERSONAL APPROACH IN R13 AND R14 IS TO CREATE AND CONFIGURE A CUSTOM TOOLBAR BUTTON THAT BOTH LOADS AND STARTS THE PROGRAM. THE BUTTON COMMAND IS (LOAD "STL") STL. IT'S THAT SIMPLE.
3. PICK THE SHAPE TYPE:
^^^^^^^^^^^^^^^^^^^^^^^^^
WHEN THE PROGRAM STARTS, IT CALLS UP THE MAIN DIALOG BOX. THE BOX CONTAINS 20 BUTTONS, ONE FOR EACH AVAILABLE SHAPE TYPE. WHEN A BUTTON IS SELECTED, A LIST OF AVAILABLE SHAPE SIZES IS DISPLAYED IN THE LIST BOX.
4. PICK THE SHAPE SIZE:
^^^^^^^^^^^^^^^^^^^^^^^^^
SCROLL THE LIST OF AVAILABLE SHAPE SIZES AND PICK A SIZE. THE PICKED SIZE WILL BE HIGHLIGHTED AND A LIST OF THE DIMENSIONS FOR THAT SIZE WILL BE DISPLAYED TO THE LEFT OF THE LIST BOX.
5. PICK THE VIEW:
^^^^^^^^^^^^^^^^^^^
FIVE VIEW SELECTIONS ARE AVAILABLE BY RADIO BUTTONS. SELECT A VIEW BUTTON AND YOU ARE NOW READY TO DRAW THE SHAPE. THE 2D END VIEW IS DEFAULT. IF YOU SELECT ANY OF THE OTHER 4 VIEWS, A LENGTH DIMENSION IS REQUIRED IN THE HIGHLIGHTED LENGTH EDIT BOX. IF YOU DO NOT ENTER A LENGTH DIMENSION THE DEFAULT IS 1 UNIT.
6. PICK OK:
^^^^^^^^^^^^^
THE PROGRAM WILL DISPLAY AN ALERT BOX WITH A OOPS! ERROR MESSAGE TO TRY AGAIN IF YOU FAIL TO PICK EITHER A SHAPE TYPE OR SHAPE SIZE. IF YOU FAIL TO SELECT A VIEW, THE PROGRAM WILL DRAW THE 2D END VIEW BY DEFAULT.
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Calculates bending moment/axial force interaction diagram for rectangular or circular reinforced concrete column with typical or irregular rebar layout. Now calculates crack width under working stresses. Confirms ACI 318, AASHTO and AS3600 design codes.
ShortCol - investigation of reinforced concrete column section
ShortCol computes ultimate strength of reinforced concrete column subjected to combined axial force and bending moment. Ultimate strength is found from strain compatibility analysis assuming equivalent rectangular concrete stress distribution. In addition, ShortCol calculates transformed properties of fully cracked reinforced concrete section at ultimate limit state and calculates crack width at service limit states.
Another features:
•Shortcol analyses rectangular or circular shape concrete sections
•Rebar wizard quickly generates various typical and irregular bar layouts
•Crack width is calculated in accordance with ACI/AASHTO, British Standards, Eurocode 2 and AS3600
•Column design conforms ACI 318, AASHTO, AS3600 codes
•SI and US units
ShortCol limitations:
•Does not consider column slenderness and second order effects
•Uses only unconfined concrete properties
•Accepts only bonded to concrete reiforcing steel
The file includes the original (shareware) version and a little bit changed version.
screenshots:
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Links changed and alive.
IMPORTANT NOTICE: You may use this software for evaluation purposes only.
If you like it, it is strongly suggested you buy it to support the developers.
By any means you may not use this software to make money or use it for commercial purpose.
High Temperature Strain of Metals and Alloys: Physical Fundamentals
info:
High Temperature Strain of Metals and Alloys: Physical Fundamentals
Valim Levitin,
Publisher: Wiley-VCH
2006-03-10
173 Pages
ISBN: 3527313389
PDF 2.35 MB
Creep and fatigue are the most prevalent causes of rupture in superalloys, which are important materials for industrial usage, e.g. in engines and turbine blades in aerospace or in energy producing industries. As temperature increases, atom mobility becomes appreciable, affecting a number of metal and alloy properties. It is thus vital to find new characterization methods that allow an understanding of the fundamental physics of creep in these materials as well as in pure metals.
Here, the author shows how new in situ X-ray investigations and transmission electron microscope studies lead to novel explanations of high-temperature deformation and creep in pure metals, solid solutions and superalloys. This unique approach is the first to find unequivocal and quantitative expressions for the macroscopic deformation rate by means of three groups of parameters: substructural characteristics, physical material constants and external conditions.
Creep strength of the studied up-to-date single crystal superalloys is greatly increased over conventional polycrystalline superalloys.
From the contents:
- Macroscopic characteristics of strain at high temperatures
- Experimental equipment and technique of in situ X-ray investigations
- Experimental data and structural parameters in deformed metals
- Subboundaries as dislocation sources and obstacles
- The physical mechanism of creep and the quantitative structural model
- Simulation of the parameters evolution
- System of differential equations
- High-temperature deformation of industrial superalloys
- Single crystals of superalloys
- Effect of composition, orientation and temperature on properties
- Creep of some refractory metals
For materials scientists, solid state physicists, solid state chemists, researchers and practitioners from industry sectors including metallurgical, mechanical, chemical and structural engineers.
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info:
Fundamentals of ocean dynamics
Vladimir Moiseevich Kamenkovich
Elsevier, 1977
ISBN 0444415467, 9780444415462
-Statics Thermodynamics of equilibrium
-Dynamics Thermodynamics of irreversible process
-Wave motion in the ocean
-Equation of the theory of ocean currents and their properties
-Ekman theory wind driven currents in a homogeneous ocean
-Two dimensional models of ocean currents
-Three dimensional models of ocean currents
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It's a good idea open possibility to post interesting and curious links about structures (in general). I'm not referring a existing "Famous Projects" forum.
If yes, where is the best place?
The idea is put links like:
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The book offers a careful introduction to modern non-linear mechanics. The used mathematical tools, such as tensor algebra and analysis are given in detail. The general theory of mechanical behaviour is particularized for the broad and important classes of elasticity and plasticity. It is intended to bring the reader close to the fields of today's research activities. A list of notations and an index help the reader to find specific topics. The book is based on three decades of teaching experience in this field.
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Edit reason: Post redesigne using CivilEA Post Generator. Dead link deleted. (G)
Buildings are designed per building code regulations, aptly termed Prescriptive Based Design. It is a methodology based upon meeting all of the specific requirements of the code.
In prescriptive based design, the normal engineering analysis practice is to assume linear-elastic behavior for structural members, which fails to reliably account for redistribution of forces due to member nonlinear behavior and dissipation of energy due to material yielding. Because of this, considerable damage has been observed and life safety goals was not achieved from major earthquakes in recent decades in residential and commercial buildings. Safety is understood as the structures ability to deform in the inelastic range but no collapsed is allowed.
During high seismic excitation, the building generally responds well beyond its elastic and linear capacity. There are two inelastic nonlinear options available for assessing the performance of a structure subjected to earthquake load; namely Pushover Analysis and Inelastic Nonlinear Time History Analysis. These two methods of analyses are used in Performance Based Design. It is a methodology using advanced engineering tools and methods to provide solutions to complex life safety problems in order to achieved life safety goals.
The purpose of this presentation is to explain the procedure in performing Inelastic Nonlinear Analysis using the professional software XTRACT v3.0.8 and PERFORM-3D v4.0.3, to evaluate the performance of multi-storey buildings (designed by traditional linear static and linear dynamic load procedures) when subjected to earthquake ground motion.
NOTES/COMMENTS:
1. To run the presentation, double click the filename "Performance.pps".
2. The hyphotetical RC moment resisting frame building investigated in the presentation was also investigated by performing Pushover and Inelastic Nonlinear Time History analysis in MIDAS Gen 7.0.2., and the results of the building performance are the same. The advantage of using MIDAS Gen is that, no need to use XTRACT to calculate inelastic strength and plastic rotation capacity, and to compute manually the center of mass of the floor, translational mass, and rotational mass of moment of inertia.
Finite Element Modelling of Composite Materials and Structures
info:
Finite Element Modelling of Composite Materials and Structures
By F. L. Matthews, G. A. Davies, D. Hitchings, C. Soutis, University of London
Publisher: Woodhead Publishing Ltd
Number Of Pages: 214
Publication Date: 2000-12
ISBN-10 / ASIN: 1855734222
ISBN-13 / EAN: 9781855734227
Performance prediction is an important factor in ensuring the correct design specification of composite materials. This practical reference fills a substantial need for an introduction to a technique that is quickly becoming a requisite tool for composite materials. The book is based on the well-established course run by the Centre for Composite Materials at Imperial College. It covers the essential characteristics of composite materials and in particular, those of fibre-reinforced plastics. KEY FEATURES: Provides background in the fundamentals of composites and the fundamentals of finite element analysis Presents various strategies for applying finite elements to composites Include case studies
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Landslides: Risk Analysis and Sustainable Disaster Management
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Landslides: Risk Analysis and Sustainable Disaster Management
By Kyoji Sassa
Publisher: Springer
Number Of Pages: 386
Publication Date: 2005-11-28
ISBN-10 / ASIN: 3540286640
ISBN-13 / EAN: 9783540286646
Based on contributions to the first General Assembly of the International Consortium on Landslides, this reference and status report emphasizes the mechanisms of different types of landslides, landslide risk analysis, and sustainable disaster management. It comprises the achievements of the ICL over the past three years, since the Kyoto assembly. It consists of three parts: research results of the International Programme on Landslides (IPL); contributions on landslide risk analysis; and articles on sustainable disaster management. In addition, the history of the ICL activities (under the support of UNESCO, WMO, FAO, UN/ISDR, and UNU) is recounted to create a comprehensive overview of international activity on landslides. The contributions reflect a wide range of topics and concerns, randing from field studies, identification of objects of cultural heritage at landslide risk, as well as landslide countermeasures.
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