INFLUENCE OF JOINT COMPLIANCE ON THE BEHAVIOUR OF SPACE STRUCTURES
Chapter 1 introduces space frames and double layer grids in particular, with the advantages of using double-layer grids. Jointing systems available around the world are briefed and the node connector used in the present study is introduced with a briefwrite-up on its advantages and disadvantages. This chapter also explores the available literature and, the scope and objectives of the thesis are mentioned.
Chapter 2 introduces 3D finite element models of the hollow spherical and octahedral nodes. The stiffness matrixes of these nodes have been derived by conducting analyses on the computer for six sizes each of the Octa and spherical nodes. Using the stiffness matrix of the node, a new method of incorporating this into the regular analysis of a space truss has been developed. The new method proposed yields realistic values for the forces in the members and takes into account the elastic deflections in the node under the action of member forces. Implementation of the proposed method has been carried out by a custom program using state-of-the-art object oriented programming techniques. A sample problem has been analyzed using this program to demonstrate the effect of including joint flexibility. The effect of flexibility of nodes on the effective length of compression members in double-layer grids has been evaluated. The effect of compliance on the dynamic characteristics of a space frame has also been evaluated for the sample space frame with flexible joints. The analysis program has been modified to
evaluate the natural frequencies of the system using rigid or flexible nodes.
The study of the Octa node and spherical node under the action of uniaxial compression and tension dominates the contents of Chapter 3. The two types of nodes have been analyzed using commercially available finite element software considering material nonlinearity. The stress patterns from the analyses have been examined thoroughly. Two consistent methods for fixing the load at yield in both uniaxial compression and tension have been proposed using the load-displacement curve. Yield loads for all the nodes have been evaluated using both the methods and the results agree well between the two methods. Three material yield values have been selected for each of the node size for evaluating the yield values viz. 240,320 and 415 MPa. The members of a double layer grid are connected to the nodes by bolts and holes are drilled in the nodes for this purpose. The bolthole patterns differ between two popular types of double-layer grids. Both these bolthole patterns have been modeled separately in the above exercise and the results for these two have been shown to be approximately the same. The effect of varying diameters of the boltholes on the response of the nodes has been examined. Relationships between the yield load, diameter, thickness and material yield have been developed using the method of least squares. The differences in the behaviour of the nodes under uniaxial compression and tension have been discussed. Ramberg Osgood type of relationships have been worked out for all the load-displacement curves obtained from the analyses. The simulation of non-linear behaviour of nodes with cracks with
plastic crack closing forces have been carried out with useful insights into the behavior of the two types of nodes in uniaxial compression and tension.
Chapter 4 is devoted largely for studying the two types of nodes under the influence of biaxial load combinations. The combinations studied are dual compression, dual tension and compression-tension. In all cases equal loads are applied along two orthogonal, directions in the horizontal plane. Stress patterns have been examined for each type of load combination and yield values for each case have been obtained using one of the methods proposed in chapter 3. These have been compared with the corresponding
uniaxial values in both compression and tension. Some useful inferences have been possible by studying the behaviour of the nodes under the various biaxial load combinations. In each case, relationships between the biaxial yield load, uniaxial yield load, diameter of node, thickness of node and material yield of node have been obtained using the method of least squares. The nodes have been analyzed under some selected Multi-axial loading and combinations of load which cause yield based on the second method proposed in Chapter 3 have been obtained and tabulated. However, a proper and thorough study of the nodes under multi-axial loading proved to be beyond the scope of this thesis.
Chapter 5 contains the contributions made towards developing new methods and algorithms for obtaining the several results of chapters 2,3 and 4, using object oriented programming (OOP) techniques. The contributions have been in Object Pascal, the underlying language of Delphi, a popular RAD tool developed by Borland/Inprise of USA. Several new modules have been developed to reliably handle the large amounts of data generated by the hundreds of analyses detailed in chapters 2,3 and 4. The ease with
which new methods were possible to be incorporated into existing software using OOP has been demonstrated, with source code exampIes. Comparisons with other types of tools available and the advantages of using OOP have also been demonstrated using the experience during the preparation of this thesis. A strong case for OOP as an indispensable tool for the researcher has been made.
Chapter 6: Several important conclusions and suggestions for future work have been made.
483 pages
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I am after steel design guides from the Australian Steel Institute (ASI), which is formerly also known as AISC. I'm guessing due to confusion with the American institute of the same name it was changed to simply ASI.
They also have their own series of guides ( like AISC 25 or so), so i was wondering if anyone had access to these and is willing to share. Also they are all to Australian Steel Code AS4100.
I'm mainly after the design capacity tables for open and hollow sections.
Steel Detailing in CAD format is a set of drawings having part of the so named volume writen by Kamel A. Zayat and edited by John Wiley & Sons, Inc. I hope these details are very useful for detailers and designers.
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Glass Construction Manual By Christian Schittich, Gerald Staib, Dieter Balkow
Publisher: Birkhäuser Base
Publish Date:1999
328 Pages
ISBN: 3764360771 , 0817660771
PDF :50 MB
The distinguishing feature of the construction manuals from Edition Detail and the internationally renowned journal Detail is the exceptional quality of the information it imparts. These books have set new standards and become indispensable in the daily work of planning and building. They are now being published in English for the first time. This volume shows the wide range of possibilities for using glass in construction, beginning with a historical overview of glass in architecture. It goes on to explore the principles of construction, providing information on the physical properties of glass together with the practical aspects such as fixing systems. Also investigated are different types of glass, energy-saving aspects, norms and guidelines. The entire spectrum in contemporary glass building is documented with a large number of international examples.
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Engineering Materials Volume 1
By D R H Jones, Michael Ashby,
Publisher: Butterworth-Heinemann
Number Of Pages: 320
Publication Date: 1996-10-30
Sales Rank: 609036
ISBN / ASIN: 0750630817
EAN: 9780750630818
Book Description:
This book gives a broad introduction to the properties of materials used in engineering applications and is intended to provide a course in engineering materials for engineering students with no previous background in the subject. Engineering disasters are frequently caused by the misuse of materials and so it is vital that every engineer should understand the properties of these materials, their limitations and how to select materials which best fit the demands of his design.
The chapters are arranged in groups, each group describing a particular class of properties: the Elastic Moduli; the Fracture Toughness; Resistance to Corrosion; and so forth. Each group of chapters starts by defining the property, describing how it is measured, and providing a table of data for solving problems involving the selection and use of materials. Then the basic science underlying each property is examined to provide the knowledge with which to design materials with better properties. Each chapter group ends with a case study of practical application and each chapter ends with a list of books for further reading. To further aid the student, there are sets of examples (with answers) at the end of the book intended to consolidate or develop a particular point covered in the text. There is also a list of useful aids and demonstrations (including how to prepare them) in order to facilitate teaching of the material.
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Guide to Highway Law for Architects, Engineers, Surveyors and Contractors
Guide to Highway Law for Architects, Engineers, Surveyors and Contractors
By Mr R A O'Hara
Publisher: Taylor & Francis
Number Of Pages: 152
Publication Date: 1990-12-31
ISBN-10 / ASIN: 0419173307
ISBN-13 / EAN: 9780419173304
Binding: Hardcover
Product Description:
This book provides practical guidance from the maintenance and improvements of highways to activities related to construction work on or near highways. A superbly concise explanation of the law relating to highways... there is no padding, nothing to wade through in order to get to the information that matters.
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Systems in Timber Engineering: Loadbearing Structures and Component Layers
Systems in Timber Engineering: Loadbearing Structures and Component Layers
By Josef Kolb
Publisher: Birkhäuser Basel
Number Of Pages: 319
Publication Date: 2008-05-23
ISBN-10 / ASIN: 3764386894
ISBN-13 / EAN: 9783764386894
Product Description:
Timber construction has become completely modernized. It has gained considerably in market share with respect to competing building materials and is dominated by systems such as frame and solid timber construction.
Every timber construction is determined by its structure. Hence it is essential to know the connections and relationships from the design stage right through to the construction phase. Systems in Timber Engineering takes a whole new approach to this subject. It is a comprehensive, analytical, and visually organized treatment, from the simple single-family house to the large-scale multistore structure. It includes the building envelope, which is so important for saving energy, and systems for ceilings and interior dividing walls, which are so essential from the vantage point of construction.
This work uses plans, schematic drawings, and pictures to show the current and forward-looking state of the technology as applied in Switzerland, a leading country in the field of timber construction.
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Hi !!
this is base shear calculation excel vb program to calculate base shear of building structure
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Publisher: Publisher: McGraw-Hill Professional
Pages: 1200
Date: 2001-12-19
ISBN: 0071358773
PDF 10,75 MB
Facility Piping Systems Handbook, Second Edition, gives you a complete design guide and reference for all piping systems, including those in laboratories, and health care facilities. This new edition includes metric units throughout; updated codes and standards; and new material on flow level measurement, drinking water systems, septic systems, and hot water circulating systems. You'll also find helpful material on pipe space requirements and fixture mounting heights. Complete with formulas, charts, and tables that increase your on-the-job efficiency, this all-in-one Handbook by Michael Frankel provides you with:
Techniques for selecting appropriate piping, valves, pumps, tanks, and other equipment involved with piping systems
Information on heat loss, insulation, freeze protection, water treatment and purification, and filtration and separation.
All necessary system design criteria
Examples of system design procedures using actual field conditions
Listings of FDA, EPA, and OSHA requirements
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