4.4 In a hypothetical seismically active region, earthquakes have been recorded over an 80-yearperiod. Part of the record is instrumental, but part is not. Combining all available data, itappears that the earthquakes have been distributed as follows:MOMENT MAGNITUDE3-44-55-6> 6NUMBER OF EARTHQUAKES~1800-150111(a) Estimate the Gutenberg-Richter parameters for the region.(b) Neglecting earthquakes of magnitude less than 3, compute the probability that an earth-quake in the region will have a moment magnitude between 5.5 and 6.5.(c) Repeat Part(b) assuming that paleoseismic evidence indicates that the region is notcapable of producing earthquakes of moment magnitude greater that 6.5.

Moment MagnitudeNumber of EarthquakesCumulative Number of Earthquakes N(M)3-4 1800…

Answered: 4.4 In a hypothetical seismically…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Historical record of Earthquakes in Pasadena from 1836 to 1961 shows that there were 16 earthquakes with ground intensity in MM-scale of VI or higher. If the occurrence of such high-intensity earthquakes can be assumed to constitute a Poisson process, what is the probability that the next high-intensity earthquake will occur within the next 2 years?
2. the probability of an earthquake with a magnitude greater than six in a year is 2%. Determine: A. probability that two earthquakes with magnitude greater than six happen in 30 years.
A long-span suspension bridge is going to be built in an active seismic region. The structural earthquake engineer can choose the design ground-motion parameter with respect to three return periods: 475, 950 and 2,500 years. Which is the most suitable return period to select and why? What is the associated probability of the peak ground acceleration for the return period being exceeded?
Civil engineering A maximum amplitude of 1.4 m is recorded on Wood-Anderson Seismometer at a standard Richter Station. Describe the expected damage in a city located 150 km from the earthquake epicenter.
a) Write two main factors that determine the probability that an earthquake will occur and briefly describe their importance in seismic prediction. b)Name and describe the four main classifications of mass movements.
11 - Richter magnitude is based on maximum seismic amplitude recorded at a distance of 100 km from epicentre by calculating ; 93 a) the log to e base of the amplitude the log to 10th base of the amplitude the log to 10th base of the 100 km distance b) d) 10 times the amplitude
3. Which theory is acclaimed as a satisfactory explanation about the cause of earthquakes? a) Elastic Rebound theory b) Clastic theory c) Tremors theory d) Seismology theory View Answer
What is the relation between recurrence interval and the annual probability of an earthquake?
Multiple Choice:- 1 Which indicators are used to evaluate the seismic intensity （） A. The amount of energy released by the earthquake source B. The degree of damage to most houses, people's feelings and other phenomena C. Magnitude of ground motion velocity and acceleration during earthquake D. Magnitude, focal depth, epicentral distance, soil conditions and landform 2 Which is not an parameter of ground motion characteristics （） A. Peak acceleration B. Earthquake duration C. Spectral characteristics D. Earthquake magnitude 3 In order to ensure that the structure will not collapse in a large earthquake, the structure is required to have （） A. Large initial stiffness B. High section bearing capacity C. Good ductility D. Smaller natural vibration period 4 Which of the following is wrong about the function of setting structural columns in multi-storey masonry buildings （） A. It can enhance the integrity of the house and avoid cracking and wall collapse B. It can resist damage caused…
List the different types of seismic waves produced during an earthquake event, and relate each type to the potential for causing building damage.
Can we predict the next occurrences of earthquakes? Why or why not? Answer in 3 sentences.
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