PDF-Ground Motion gAnnual Frequency of Exceedance

10210110010710610510410310210110 in 50 yrs AFEUCERF3UCERF2 UC3UC2 093NSHMP CA UC3NSHMP 091004500500550060065007007500050101502Logic Tree GM DistrGround Motion gSummed Weights0045. GROUND MOTIONS FROM SIMULATIONS. 1. Observed data adequate for regression except. close to large ‘quakes . Observed data not adequate for regression, . use simulated data . 2. Ground-Motions for Regions Lacking Data from Earthquakes in Magnitude-Distance Region of Engineering Interest. MEASURING GROUND MOTION. The first known instrument for earthquakes measurement is the Chang seismoscope built in China in 132 B.C. . Balls were held in the dragons’ mouths by lever devices connected to an internal pendulum. The direction of the epicenter was reputed to be indicated by the first ball released.. 13. S. Akkar and D. M. Boore. Fundamentals. of S. eismology. . &. S. eismic. H. azard. A. ssessment. MEASURES OF STRONG. . MOTION. and. PROCESSING OF DATA. Ground-motion . intensity . measures (GMIMs) for . Plots and Stuff. 1. A plot is. a two-dimensional display. (. it fits on a sheet of paper. ). of. points. or. curves. or. regions. .. Plots and Stuff. 2. Plots and Stuff. 3. (5,8). x. y. (8,22). points. Period of a Pendulum: . Period based on length (L) and value of gravity (g). Uses/Applications: . Use the . magnitude. of gravity (9.8 m/s. 2. ). Example . 8. A mass (m = 5.67 kg) is attached to a rope with a length of 0.950 m. . Interference of Waves – Standing Waves. Tsunamis. Waves: Frequency, Wavelength, Velocity. Wave Motion. A vibrating point “drags” its . neighbours. into motion. As the motion spreads through space – a wave forms. The closer an object is to you, the larger it appears. How long are the lines on the road?. . When asked to guess the length of the . lines. from memory, most answered 2 feet. . The real answer is 10 feet.. GROUND MOTIONS FROM SIMULATIONS. 1. Observed data adequate for regression except. close to large ‘quakes . Observed data not adequate for regression, . use simulated data . 2. Ground-Motions for Regions Lacking Data from Earthquakes in Magnitude-Distance Region of Engineering Interest. The force applied to a spring in order to extend or compress it is proportional to the amount of displacement of the spring from its rest position.. The spring force will be equal and opposite to the applied force, as it is a tension that is a reaction force to the applied force. 10-210-110010-710-610-510-410-310-210-110 in 50 yrs AFE2 in 50 yrs AFEUCERF3 Mean below 2in50 10in50 Fault 70 76 BG 29 24 UCERF2 Mean below 2in50 10in50 Fault 75 79 BG 10-210-110010-710-610-510-410-310-210-110010 in 50 yrs AFEUCERF3UCERF2 UC3/UC2 094NSHMP CA UC3/NSHMP 09302202402602803032034000200400600801Logic Tree GM DistrGround Motion gSummed Weights02 10-210-110010-810-610-410-210010 in 50 yrs AFEUCERF32UCERF2 UC32/UC2 093NSHMP CA UC32/NSHMP 09201802022024026028000200400600801Logic Tree GM DistrGround Motion gSummed Weights02021022023024 A pulse is a single travelling disturbance.. A wave is periodic disturbances. Revised 1.27.2022 Some diagrams from Pearson Physics by Walker. Used with permission. Let’s take a look at waves in a ripple tank.. (subject 3.2). Peter Novotny. PACMAN . meeting, . CERN, 7 October 2014 . What is . seismic sensor?. . Instrument which measures . ground . motion. .. (Not only earthquakes!). Ground Motion in frequency domain.