# 2021030821344120210307172503epss8 lab08 shakeliquefaction 2 .pdf

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Student’s name:TA’s name:Sec0on:EPSS 8 - EarthquakesLab8: Shake Table and Liquefac:on TankDue Week 10In this lab, you will explore the behavior of scale models of buildings and of shaking soils.[Some sections written in red in this lab are not applicable because we cannot do thecorresponding demos in class. Read the sections to understand the concepts but you may ignorethe questions in red sections.]Part 1 (11 pts): Building resonance on a shaking tableRecap: For a propagating sine wave, the period is the time it takes for a cycle of wave to pass acertain point in space and the frequency is the number of cycles passing a point per second. Theperiod is measured in seconds (s) and the frequency is measured in Hertz (Hz) or inverse seconds(s-1). For example, a wave with a periodT=2shas a frequencyf=1/T=0.5Watch this video:In the video, the motor will shake the table and the 3 buildings with a uniform frequency. As themotor speeds up, the frequency of shaking increases and the period of shaking diminishes. Eachbuilding will respond differently to the shaking, depending on itsnatural frequency. When theshaking frequency of the table matches the natural frequency of a building, the building willshake with the largest amplitudes.Start the movie and stop it after the title page (10s). Measure the height of each building onyourcomputer screen using a ruler and report the values in the table below. If you do not have a ruler,use a lined page from a yellow pad and use the line spacing as the unit of length.Watch the entire movie and take note of the frequency when the resonance is achieved for eachbuilding. Fill up the frequency column in the table below. Then compute the period for eachbuilding.Hz .Table: 2 pts per line (0.5, 1, 0.5)

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Term
Winter
Professor
Treude
Tags
1 pt, 0 Pt