27. Seismogram
Seismograms are crucial in the analysis and design of earthquake-resistant structures by recording ground motion during seismic events. They help engineers understand seismic waves' behavior and predict potential impacts on infrastructure. This chapter delves into the components, types, interpretation, and application of seismograms in earthquake engineering, providing insight into their design and use in evaluating structural responses to seismic activity.
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What we have learnt
- Seismograms capture ground motion during earthquakes and are essential for earthquake engineering.
- Seismograms can be analog or digital, with digital seismograms offering higher resolution and easier analysis.
- Seismograms provide critical data for assessing seismic hazards, structural responses, and site-specific ground motion.
Key Concepts
- -- Seismogram
- A graphical representation of ground motion during an earthquake, used for analysis and predicting impacts on structures.
- -- Pwave
- The first seismic wave to arrive during an earthquake, characterized by fast speed and low amplitude.
- -- Swave
- The second type of seismic wave that arrives after the P-wave, with higher amplitude and slower speed.
- -- Digital Seismograms
- Modern seismograms that provide high-resolution time-series data, allowing for more accessible computation and interpretation.
- -- Peak Ground Acceleration (PGA)
- The maximum acceleration recorded during an earthquake, critical for engineering design.
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