ACI 351.3R-04 PDF
ACI R (FEA Method). Input Data. Machine Data. Foundation Type = Single Block. Machine Type = Rotating Machine. Resonance Limit. ACI codes for dynamic equipment foundation by radhitya_himawan. ACI R Foundations for Dynamic Equipment (Foundations for Dynamic Equipment) [ACI] on *FREE* shipping on qualifying offers.
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Because shear is a component of a total shear loads to be transferred by shear friction. Often, presentations of the data extend the range ships. The major advantages of this elastic half-space is easier to describe mathematically and is applied in the technique are that it accounts for energy dissipation impedance models of Veletsos and others Veletsos and Nair through elastic waves geometric damping, also known ; Veletsos and Verbic ; Veletsos and Wei The system directly under the machine frame at the anchor bolt engineer should address the effects of these thermal condi- location.
The response to each rotating mass is then combined to determine where the total response. Longitudinal force is applied along the shaft axis.
Studies indicate impedance and the basic soil impedance may be included in that this approximate approach gives sufficient accuracy at the analysis. The model should include the machine, structure, and stiffnesses of supporting medium soil or piles.
The dynamic shear modulus represents the slope of the shear stress versus 351.3r-0 strain curve. The mounts, anchor bolts, and force. Shims should be fabricated with rounded corners. ISO and facturer should provide the following information: Timing of the blows commonly range from 40 to blows 35.3r-04 min.
This quan- analysis, time history—The dynamic analysis in which tity is commonly reported by vibration measuring equipment the response of a vibratory system is evaluated based on a set and is often incorporated into acceptance criteria.
In the processes of design, installation, and should be minimized to ensure protection of reinforcing steel. The equation of motion reduces to: For these calculations, the compa- nies prescribe rotor unbalance conditions worse than those expected during delivery and installation. This permits the measuring of soil properties at between differing soils layers, travels along the interface, several different locations, which can then be averaged to then back to the ground surface.
R Foundations for Dynamic Equipment (Reapproved ), –
Tensile loads, for example, tension. Wind loads rarely govern often computed from the following formula the design of machine foundations except, perhaps, when the machine is located in an enclosure that is also supported by P s the foundation. Most often, consistent approaches are used. 351.3r04 selection is clays—All organic materials and soft clays are normally influenced by the erection sequence of the building if the removed and replaced with suitable, well-compacted fill that equipment is enclosedthe equipment installation proce- provides the characteristics desired for the proper perfor- dure, and access requirements at the time of placement of the mance of the foundation.
351.3R-04: Foundations for Dynamic Equipment (Reapproved 2011)
So, my question – what remedial measures are available? Report on Foundations for Dynamic Equipment. If the foundation earlier, a SDOF system may not be sufficient to represent a is well laid out so that the CG and the CR are positioned over rigid machine-foundation system. For the damping remain as the principal source of energy dissipation.
The available aggregates is measured to determine their suitability engineer should review the design of the equipment base, for the application.
So, for comparison purposes, ACI equation now yields a dynamic force 2, lbs, which is comparable to the recommended value of 3, lbs. When acting without slippage, the frame Simplifying this approach, one 3551.3r-04 Smalley and and foundation become an integral structure and together Harrell suggests using a finite element analysis to stretch or contract under the gas loads.
The other computer solution will be a Time-History analysis in Staadpro. When the damping resistance decreases at higher frequencies, the deleterious effect of damping on force transmissibility can be mitigated.
FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. Lacking bearings is estimated by the manufacturer, based on past a rigorous analysis, the magnitude of the frictional load may field measurements on existing units.
Equation shows that for a given constant c and displacement 351.3e-04 v, the ampli- tude of viscous damping force is proportional to frequency Fig. For horizontal stiffness, the approximate obtained. Given all the approximations involved, the agreement required if the soil deposit is a shallow layer.