Results 271 to 280 of about 27,908 (298)

Earthquake Response of Arch Dams

Journal of the Structural Division, 1970
A theoretical assessment of dynamic response of arch dams due to earthquakes is attempted using the finite element shell formulation. The results of the analysis reveal that seismic forces can induce high tensile stresses in arch dams and therefore these forces should be given serious consideration in aseismic design.
Umesh Chandra Tahbildar, Hugh Tottenham
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Social Media for Earthquake Response

Proceedings of the ACM on Human-Computer Interaction, 2017
When a 7.8 intensity earthquake caused widespread disaster in Ecuador on April 16, 2016, citizens across the country self-organized to gather, mobilize, and distribute supplies to affected populations, assuming the role of ad hoc humanitarian logisticians.
Marisol Wong-Villacres, Cristina M. Velasquez, Neha Kumar   +2 more
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Some ionospheric responses to earthquakes

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
© 2014 IEEE. Since 2010 long term observations by ionosonde in Kazan with 1-min intervals is made. Such operating mode allows rare effects occurring in ionosphere and caused by earthquakes and big explosions would be record in ionogram. In paper the characteristic features (signature) of severe events are detected in ionograms when the epicenter was at
Akchurin A., Yusupov K., Zainullina A.
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Lateral Pile Response During Earthquakes

Journal of the Geotechnical Engineering Division, 1981
A nonlinear method for seismic soil-pile-structure interaction is presented. Primary features of the proposed method include a consistent approach to determine seismic p-y relationships and a liquefaction model that is suited to pore pressure evaluation for earthquake-type irregular loadings. The seismic- p-y relationships are determined from nonlinear
Takaaki Kagawa, Leland M. Kraft
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Earthquake response of underground pipelines

Earthquake Engineering & Structural Dynamics, 1979
AbstractSeismic response of underground pipelines is investigat́ed theoretically considering dynamic soil‐pipe interaction. A lumped mass model of the pipe is employed with the soil reactions derived from static and dynamic continuum theories. The soil is supposed to be homogeneous or composed of two different media separated by a vertical boundary ...
A. Hindy, M. Novak
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Earthquake Response of Structures

1985
The design of structures in earthquake regions has been based upon the assumption of a lateral load proportional to the mass of the building. For example in many areas the structure is designed to carry a “horizontal gravity” force of 0.2 g. Such designs are based upon the assumption that the period of natural vibration of the structure is large ...
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Earthquake response of inelastic structures

Nuclear Engineering and Design, 2004
The most commonly used method in the seismic analysis of structures is the response spectrum method. For seismic re-evaluation of existing facilities elastic response spectrum method cannot be used directly as large deformation above yield may be observed under Safe Shutdown Earthquake (SSE). The plastic deformation, i.e.
Y.M Parulekar, K.N Vaity, G.R Reddy, K.K Vaze, H.S Kushwaha   +4 more
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Earthquake Response of Earth Dams

Journal of the Soil Mechanics and Foundations Division, 1967
The widely used shear wedge approach for earthquake analysis of earth dams is compared with a two-dimensional dynamic stress analysis technique which uses the finite element concept. Natural frequencies and mode shapes of typical earth dam cross sections as well as their responses to the El Centro earthquake of 1940, as obtained by the two methods ...
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Response of electronic earthquake recorder

Eos, Transactions American Geophysical Union, 1946
Preliminary tests made to determine the response characteristics of‐an electronic earthquake recorder are described. Tests were conducted with a Wenner and a special seismometer as well as with a Neumann‐LaBarre vibration meter. Simultaneous recordings on both smoked paper and photographic paper, which were made on the same drum and from the same ...
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Mexico City Earthquake: Medical Response

Prehospital and Disaster Medicine, 1986
The earthquake that shook Mexico City could not have chosen a more vulnerable target. The capital city is located in the center of the world's most populated area. Some 18 million people, one fourth of the nation's inhabitants, are jammed into a mere 890 square miles, roughly 1% of the predominantly rural area.
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