Foundations for Dynamic Equipment (Chapter 3 and 7)-Foundations for Dynamic Equipment (Chapter 3 and 7) (PDF)

Foundations for Dynamic Equipment (Chapter 3 and 7) (PDF)

Pdf Summary

The document is an extensive report crafted by the ACI Committee 351, focusing on the analysis, design, and construction of foundations for dynamic equipment. It provides comprehensive guidance for industry practitioners on the engineering processes and methodologies essential for creating robust concrete foundations that can withstand dynamic forces from machinery such as steam turbines, compressors, and other significant industrial equipment.<br /><br />The report is organized systematically starting from the general introduction, highlighting the necessity for foundations to resist dynamic forces ensuring machinery alignment and vibration control for operational longevity. It underscores the collaboration required between machine manufacturers, engineers, and construction personnel due to varying foundation criteria from different manufacturers.<br /><br />The document outlines key chapters focusing on notation and definitions, various machine and foundation types, design loads, and the impedance of supporting media involving soil analyses and dynamic considerations. It dives into comprehensive vibration analysis and acceptance criteria, presenting various modeling techniques (both rigid and flexible foundations), along with solution and frequency analysis methods.<br /><br />Design methods discussed range from rule-of-thumb to dynamic analysis techniques, providing insights into selecting foundation sizes, adjusting structures for stiffness, and ensuring compliance with vibration and structural criteria to prevent excessive vibrations which may increase foundational costs and complexity if unaddressed early.<br /><br />Special attention is given to machine anchorage, the importance of appropriate anchoring systems, and tensioning to maintain machine alignment, critical for operational stability.<br /><br />Concrete properties, considering strength, durability, dynamic modulus, and material damping, are evaluated, applying standards for oversized structures with strategic reinforcements to ensure long-term durability against cyclic stresses.<br /><br />The report further covers construction considerations such as subsurface preparation and repair methodologies to extend the service life of foundations, introducing practical examples and calculations to illustrate how theoretical principles are applied in practice. It emphasizes the need for careful design early in the project to avoid costly remedial measures after construction.

Keywords

dynamic equipment foundations

vibration control

ACI Committee 351

machine anchorage

concrete properties

dynamic analysis

foundation design

soil analyses

construction considerations

industry guidance