– Response spectrum of an earthquake ver irreg larery irregular. Shock Response Spectrum The amplification factor for the curve in Figure 6 is Q=10, which is equivalent to a damping ratio of 0.05. Dr. Hazim Dwairi 1940 El Centro, 0.35 g, N1940 El Centro, 0.35 g, N--SS Dr. Hazim DwairiDr. – Spectrum has a general trapezoidal Superpositon of Response Spectra I am quite new to earthquake engineering and was hoping someone could help me out. A displacement response spectrum is the plot of maximum displacement of a single degree of freedom system (SDOF) to a particular ground motion as a function of the natural frequency and damping ratio of the SDOF. I am looking at the El Centro 1940 quake and trying to plot the earthquakes response spectrum. Hazim Dwairi The Hashemite University The Hashemite University Intro. Keywords: Soil, Earthquake, Response spectra, Seismic analysis, Acceleration, Ordinary differential equation. The response spectrum for north-south component of El Centro ground motion for damping ratio = 0, 2, 5, and 10% is plotted together with the ground motion parameters ugo, u … At this stage, I have plotted Acceleration v Time, Velocity v Time and Displacement v Time. Figure 2(b) shows the acceleration response spectra calculated for the El Centro 1940 earthquake for various damping values. 0 510 15 20 25 Time (s) 0.3 T = 3.0 s max 0.255 m Displacement Response Spectrum 0 0.3-0.3 0 03 T = 2.5 s 03 0 0.3-0.3 max 0.176 m T = 2.0 s max 0.274 m DISPLACEMENT SPECTRUM EL CENTRO RECORD Response Spectrum Characteristics We now study the important characteristic of response spectrum of earthquake ground motions. Note the level in Figure 6 is somewhat higher that the corresponding VAFB level in Figure 2. ... El Centro , 1940, Record N S Comp. SHOCK RESPONSE SPECTRA, Q=10 EL CENTRO EARTHQUAKE MAY 18, 1940 NORTH-SOUTH COMPONENT Figure 6. The El Centro earthquake occurred in United States of America on 18th May, 1940 with moment magnitude of 6.9 and Mercalli intensity scale. Earthquake Ground Motions. S00E). 589-603, Warszawa 1987 Horizontal-vertical response spectra for El Centro 1940 earthquake I. I. ORABI (NEW HAVEN) and G. AHMADI (POTSDAM) A SINGLE-DEGREE-OF-FREEDOM structure subjected to horizontal and vertical earthquake ground accelerations is considered. Cite this Article M. Ahatri , K Baba,S. Touijrate And L. Bahi, The Seismic Motion Parameters Effects on Response Spectra: Comparison Between El Centro 1940 and Imperial Valley 1979 Earthquakes, International Journal of Civil Engineering and … Present code plots the response spectrum for the given seismic input. 3. Chapter 2: Strong Motion and Estimation of Seismic Hazard; Chapter 3: Dynamics of Earthquake Analysis; Chapter 4: Response Spectrum Method; Chapter 5 : Response Analysis for Multi Support Earthquake Excitation ; Chapter 6 : Seismic Soil-Structure Interaction; Chapter 7: Non-linear Seismic Response of Structures This predefined data is taken from J. Biggs’ Introduction to Structural Dynamics and is based on the north-south component of the May 18, 1940 El Centro California earthquake. values, response spectra of El Centro earthquake (1940 05 18, comp. earthquake (Clough 1962) or, based on the seismic history of an area, an acceleration spectrum envelope is developed for use in structural design. Arch. To EQ Eng. Lecture 6 Lecture 6 –– Design Response Design Response Spectrum Dr Hazim Dwairi Dr. Hazim DwairiDr. The corrected accelerograms of El Centro 1940 earthquake There are four major sources of earthquake spectra available in CAESAR II: El Centro. 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