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Full-Text Articles in Civil and Environmental Engineering
Amplification Of Earthquake Ground Motions In Washington, Dc, And Implications For Hazard Assessments In Central And Eastern North America, Thomas L. Pratt, J. Wright Horton Jr., Jessica Munoz, Susan E. Hough, Martin C. Chapman, C. Guney Olgun
Amplification Of Earthquake Ground Motions In Washington, Dc, And Implications For Hazard Assessments In Central And Eastern North America, Thomas L. Pratt, J. Wright Horton Jr., Jessica Munoz, Susan E. Hough, Martin C. Chapman, C. Guney Olgun
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The extent of damage in Washington, DC, from the 2011 MW 5.8 Mineral, VA, earthquake was surprising for an epicenter 130 km away; U.S. Geological Survey “Did-You-Feel-It” reports suggest that Atlantic Coastal Plain and other unconsolidated sediments amplified ground motions in the city. We measure this amplification relative to bedrock sites using earthquake signals recorded on a temporary seismometer array. The spectral ratios show strong amplification in the 0.7 to 4 Hz frequency range for sites on sediments. This range overlaps with resonant frequencies of buildings in the city as inferred from their heights, suggesting amplification at frequencies to …
Displacement Of Bridge Abutment Under Earthquake Loading, Yulman Munaf, Shamsher Prakash
Displacement Of Bridge Abutment Under Earthquake Loading, Yulman Munaf, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
Bridge abutments may experience significant displacements during earthquakes. A two-dimensional model has been developed considering sliding and overturning displacement and 1) strain dependent soil stiffness and soil damping and 2) horizontal and vertical time dependent seismic load. The displacements are computed from the static equilibrium position where the seismic backfill force increments are considered for determining the active earth force acting behind the abutment wall. This means that the permanent displacement increment occurred if the acceleration acts towards the backfill and the abutment wall moves away from the backfill. The total displacement at the top of bridge abutment is calculated …
Pile Response Characteristics Of Liquefied Soil Layers In Shaking Table Tests Of A Large Scale Laminar Shear Box, Kaeko Yahata, Yasutsugu Suzuki, Hideki Funahara, Mutsuhiro Yoshizawa, Shuji Tamura, Kohji Tokimatsu
Pile Response Characteristics Of Liquefied Soil Layers In Shaking Table Tests Of A Large Scale Laminar Shear Box, Kaeko Yahata, Yasutsugu Suzuki, Hideki Funahara, Mutsuhiro Yoshizawa, Shuji Tamura, Kohji Tokimatsu
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
To better understand the causes of pile damages during earthquakes such as Hyogoken-Nanbu Earthquake, shaking table tests of soil-pile-structure interaction models were done using a large scale laminar shear box. Because the pile response is affected by both the ground motion and the structure's inertial forces, three models were test & a soil-pile model and two soil-pile-structure models. For the latter models, superstructures with long and short natural periods were tested separately. Through comparisons among the three cases, the influences on the pile response due to the inertial force of the superstructure for the long and short natural periods were …