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Home > Publications > International Concrete Abstracts Portal
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
SP78-15
A. Rajaraman and C.V. Vaidyanathan
In the design of frames supporting machines inducing harmonic excitations, the frequency level is a major consideration. Altering this level - called tuning - requires the change in design parameters. This study presents results by introducing a new parameter - taper - so that existing frames could be tuned properly or in many cases redesigned to take up increased speeds of machinery. The results are given in tabular form for ready reference.
10.14359/17527
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
SP78-04
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
SP78-01
Suresh C. Arva and George Pincus
Most reciprocating machines are critical to the operation of the plant and, therefore, the sr~pporting structure must be carefully designed to avoid potential undesirable behavior such as attainment of a resonance condition. The designer is then confronted with selecting the best possible techniques in order to accomplish a trouble- free condition. Available engineering analysis tools include theory of vibrations, half-space theory, soil-structural analysis computer programs and rational modeling techniques. This paper summarizes and reviews the steps that must be considered during design of the supporting structure for an elevated reciprocating machine and provides practical guidelines which serve to obtain a realistic and useful design. Four different models are presented and discussed and an example problem is used to illustrate the main features and results of each model. It is concluded that the combination of the best modern scientific tools and modeling technique coupled with practical guidelines yields a reliable structural configuration.
10.14359/16902
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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.
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