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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 16 Abstracts search results
Document:
SP78
Date:
January 1, 1982
Author(s):
Editor: Allan R. Porush
Publication:
Symposium Papers
Volume:
78
Abstract:
SP78 A collection of 15 papers on foundations for equipment and machinery, covering design and research. The topics include: baseplate grouting, elevated foundations for reciprocating machines, case studies of machine foundations under dynamic loads, pile supported machines, turbine pedestal structure, and more.
DOI:
10.14359/14130
SP78-04
A. Harry Karabinis and Timothy J. Fowler
The design of foundations to support large items of mechanical equipment is becoming increasingly important. In many industrial environments the consequences of vibration are severe. For example, sensitive processes can be rendered inoperable, process and mechanical equipment can be damaged, and work conditions can become intolerable. This paper reviews the design and performance of a number of equipment foundations subjected to dynamic loads. The case histories presented typify the types of foundations and dynamic loads commonly encountered in industrial environments. Included are both mat and piled footings, and foundations supported on drilled piers. Fans and compressors are representative of the types of equipment discussed. It is the intent of this paper to present guide- lines for the design of equipment foundations where dynamic loads are involved. The paper reviews the various analytical approaches available to the designer, and those factors which influence the development and choice of a suitable analytical model. Primary emphasis is placed on the development of nonresonant designs. Other topics presented include, limits placed on displacement amplitudes, damping, the effects of foundation geometry and mass distribution, and allowable soil bearing pressures.
10.14359/16905
SP78-03
Gary R. Hall, George W. Read, Jr., and R. L. Trinklein
The properties of portland celllent based nonshrink grouts are discussed. A review of the basic engineering concepts involved is presented. A brief discussion on the chemistry involved in grout technology is presented. Performance criteria are discussed in some detail, along with methods of testing for the perfortilance criteria. A brief description of the various grouting systems available to the market place is presented.
10.14359/16904
SP78-02
Donald E. Baxa and Robert Ebisch
This paper is a case study of pneuniatic isolation systeliis in large automobile recycling machines. Machines of increasing size and power, plus a public that is increasingly insistent on its right to an environment free of noise and vibration, equal potential problenis for recycling plants. In response to this situation, a hammermill/shredder operation making successful use of pneunlatic isolation has been designed and constructed. The first, and still the largest, operation of its kind, the operation has demonstrated a valuable method of containing machine vibrations that might otherwise ignite hostility in the surrounding community and quite possibly bring on expensive legal action. The particular system described was installed in a 4,000-horsepower hammermill at an Indiana recycling firm. Besides effecting a more than 90 percent reduction in ground vibration, the system allows for easier and more efficient machine leveling and includes systems to warn of and localize pressure loss, to minimize routine mechanical shock, and to contain extraordinary shocks resulting from exploding gas tanks and loss of hammers within the machine. The system has now been in use for two years with no reported problems.
10.14359/16903
SP78-08
P. Srinivasulu and N. Lakshmanan
In the first part, the paper critically reviews the current state of art on the analysis and design of typical types of machine foundations. The uncertainties in the design data and paucity of essential information required for a rational design are highlighted. The need to study the geotechnical features and other environmental factors at the proposed site of a machine foundation is emphasized. The various aspects of the problem of a machine foundation are illustrated with the explanation of five typical case studies selected from authors' experience in this line of work. The paper also underlines the need for a close co-ordination between the civil and mechanical engineers responsible for the installation of machine foundation right from the early stages of planning.
10.14359/16909
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