3. Types of Damping
Damping is essential in controlling the vibrations of structures caused by dynamic forces like earthquakes. Different types of damping mechanisms, including viscous, Coulomb, and structural damping, are explored for their applications in earthquake engineering. Understanding these mechanisms is pivotal for designing resilient structures that ensure safety and performance during seismic events.
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What we have learnt
- Damping dissipates vibrational energy in structures, preventing damage from dynamic forces.
- Various types of damping mechanisms, such as viscous and hysteretic damping, have specific coefficients and characteristics relevant to structure behavior.
- Damping plays a crucial role in enhancing the performance of structures during seismic events and is integrated into building codes for design standards.
Key Concepts
- -- Damping
- The process by which vibrational energy in a structure is dissipated over time, acting as a resistance to motion.
- -- Viscous Damping
- A type of damping where the damping force is proportional to the velocity of the moving mass, commonly used in engineering models.
- -- Coulomb Damping
- Damping arising from friction between two surfaces, characterized by a constant force opposing motion.
- -- Structural Damping
- Energy dissipation due to internal friction in materials, dependent on amplitude of vibration, represented by hysteresis loops.
- -- Damping Ratio
- A dimensionless measure indicating the damping characteristics of a system, with different ranges indicating various states of damping.
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