Preface 1996 NCEER AND 1998 NCEER/NSF WORKSHOPS ON
... of liquefaction resistance, including the standard penetration test (SPT), the cone penetration test (CPT), shear-wave velocity measurements (Vs), and the Becker penetration test (BPT). These tests were discussed at the workshop, along with associated criteria for evaluating liquefaction resistance. ...
... of liquefaction resistance, including the standard penetration test (SPT), the cone penetration test (CPT), shear-wave velocity measurements (Vs), and the Becker penetration test (BPT). These tests were discussed at the workshop, along with associated criteria for evaluating liquefaction resistance. ...
CITY OF ABILENE ITEM 420 CONCRETE STRUCTURES
... substructure before the concrete therein has attained a flexural strength of 425 psi. (2) Storage of materials on completed portions of a structure will not be permitted until all curing requirements for those particular portions have been met. (3) A minimum flexural strength of 340 psi will be requ ...
... substructure before the concrete therein has attained a flexural strength of 425 psi. (2) Storage of materials on completed portions of a structure will not be permitted until all curing requirements for those particular portions have been met. (3) A minimum flexural strength of 340 psi will be requ ...
Latitudinal distribution of earthquakes in the Andes and its peculiarity
... MRs with size of each latitudinal belt equal to 10◦ were discussed. The binormed EQ distributions in latitude for five MR are presented on the Fig. 3. It may be marked one clearly expressed peak in latitudinal belt 20◦ –30◦ S for the all MRs and almost zero values of the EQ number in the high latitu ...
... MRs with size of each latitudinal belt equal to 10◦ were discussed. The binormed EQ distributions in latitude for five MR are presented on the Fig. 3. It may be marked one clearly expressed peak in latitudinal belt 20◦ –30◦ S for the all MRs and almost zero values of the EQ number in the high latitu ...
Spatiotemporal relationships between earthquakes of the Mid
... Oceanic lithosphere that terminates at passive margins moves under the action of two plate driving forces. One force is friction applied to the base of the lithosphere due to convective flow in the asthenosphere and trends in the direction of the convective flow (Kirdyashkin and Kirdyashkin, 2013). ...
... Oceanic lithosphere that terminates at passive margins moves under the action of two plate driving forces. One force is friction applied to the base of the lithosphere due to convective flow in the asthenosphere and trends in the direction of the convective flow (Kirdyashkin and Kirdyashkin, 2013). ...
Moment Magnitude Estimates for Earthquakes in the Greek Region
... quickly assess the severity of the resulting ground motion and its potential to cause damage to built structures. Magnitudes are also of primary importance for b-value estimation and seismic-hazard assessment. Over the last century, several definitions of magnitude have been proposed, such as local ...
... quickly assess the severity of the resulting ground motion and its potential to cause damage to built structures. Magnitudes are also of primary importance for b-value estimation and seismic-hazard assessment. Over the last century, several definitions of magnitude have been proposed, such as local ...
comparison of earthquake locations determined with
... same, but for crustal structure A the depths are generally 1 to 2 km shallower, and the standard errors are lower. There is as much as 1-sec scatter in the composite travel-time plot for observed travel times at constant distance. Generally, however, P waves from explosions detonated on the south co ...
... same, but for crustal structure A the depths are generally 1 to 2 km shallower, and the standard errors are lower. There is as much as 1-sec scatter in the composite travel-time plot for observed travel times at constant distance. Generally, however, P waves from explosions detonated on the south co ...
Seismicity and earthquake hazard analysis of the Teton
... axes of the corresponding 68% confidence ellipsoids; errors in depth were much larger by 2 or 10 times that of the horizontal errors. Therefore, hypocenter locations fitting the prior selection criteria with a vertical error less than 5 km were selected to be used for the 3-D velocity inversion. The v ...
... axes of the corresponding 68% confidence ellipsoids; errors in depth were much larger by 2 or 10 times that of the horizontal errors. Therefore, hypocenter locations fitting the prior selection criteria with a vertical error less than 5 km were selected to be used for the 3-D velocity inversion. The v ...
Change of crustal gravitational potential energy in the Taiwan
... are generally deeper than the 8 km depth of the main shock (Fig. 2c). It implies that the main shock could have simply triggered the release of the elastic strain energy stored beneath central Taiwan due to the plate convergence. 3.1. Temporal change of the cumulative crustal GPE As shown by the tem ...
... are generally deeper than the 8 km depth of the main shock (Fig. 2c). It implies that the main shock could have simply triggered the release of the elastic strain energy stored beneath central Taiwan due to the plate convergence. 3.1. Temporal change of the cumulative crustal GPE As shown by the tem ...
Earth And Planetary Science Letters
... (Bs) fractions of the mechanical mixture with more olivine and free silica and less pyroxene than in the equilibrium assemblage. Since the phase equilibria differ, the seismic velocity of EA and MM are not the same (Figs. 2–4). Tables of computed values of VP, VS, and density for EA and MM as a func ...
... (Bs) fractions of the mechanical mixture with more olivine and free silica and less pyroxene than in the equilibrium assemblage. Since the phase equilibria differ, the seismic velocity of EA and MM are not the same (Figs. 2–4). Tables of computed values of VP, VS, and density for EA and MM as a func ...
Spatial variation of lithospheric heterogeneity on the globe as revealed... P Mungiya Kubanza, Takeshi Nishimura, and Haruo Sato
... a depth of less than 200 km) determined by Gung and Romanowicz (2004) from surface waveform analyses is also consistent with our results. Since the normalized transverse amplitudes determined by applying a long (30 s) time window indicate spatial variations quite similar to the results obtained with ...
... a depth of less than 200 km) determined by Gung and Romanowicz (2004) from surface waveform analyses is also consistent with our results. Since the normalized transverse amplitudes determined by applying a long (30 s) time window indicate spatial variations quite similar to the results obtained with ...
Upper mantle structure of the Saharan Metacraton
... and isotopic characteristics) is an Archean–Paleoproterozoic cratonic lithosphere that has been destabilized during the Neoproterozoic. It extends from the Arabian–Nubian Shield in the east to the TransSaharan Belt in the west, and from the Oubanguides Orogenic Belt in the south to the Phanerozoic c ...
... and isotopic characteristics) is an Archean–Paleoproterozoic cratonic lithosphere that has been destabilized during the Neoproterozoic. It extends from the Arabian–Nubian Shield in the east to the TransSaharan Belt in the west, and from the Oubanguides Orogenic Belt in the south to the Phanerozoic c ...
Chapter 31 - Special Construction
... be designed to resist the loads set forth in Chapter 16 of this Code except that structures or parts thereof which are intended to be removed or repositioned during periods of high wind velocity shall be designed in their open or extended position to design pressures based on a basic wind speed of m ...
... be designed to resist the loads set forth in Chapter 16 of this Code except that structures or parts thereof which are intended to be removed or repositioned during periods of high wind velocity shall be designed in their open or extended position to design pressures based on a basic wind speed of m ...
Underground Building Works – Requirements on PE(GEO) and AC
... improvement shall be limited to soil improvement work only and shall NOT be used as part of retaining wall especially acting as cantilever retaining wall. This is in line with COI report and BCA’s Advisory Note 1/09. • If grout mixed piles are present within the retaining wall, as a minimum the foll ...
... improvement shall be limited to soil improvement work only and shall NOT be used as part of retaining wall especially acting as cantilever retaining wall. This is in line with COI report and BCA’s Advisory Note 1/09. • If grout mixed piles are present within the retaining wall, as a minimum the foll ...
Earthquake triggering and large-scale geologic storage of
... Deep borehole stress measurements confirm the critically stressed nature of the crust in continental interiors (12), in some cases at sites directly relevant to the feasibility of large-scale CCS. For example, deep borehole stress measurements at the Mountaineer coal-burning power plant on the Ohio R ...
... Deep borehole stress measurements confirm the critically stressed nature of the crust in continental interiors (12), in some cases at sites directly relevant to the feasibility of large-scale CCS. For example, deep borehole stress measurements at the Mountaineer coal-burning power plant on the Ohio R ...
Radon as an Earthquake Precursor – Methods
... of the bedrock and soil in areas of crustal discontinuities, such as fractures and fault zones, promotes intense degassing fluxes, which causes higher soil gas radon concentrations on the ground surface above active fault zones. Although several measurements, experiments and models have been perform ...
... of the bedrock and soil in areas of crustal discontinuities, such as fractures and fault zones, promotes intense degassing fluxes, which causes higher soil gas radon concentrations on the ground surface above active fault zones. Although several measurements, experiments and models have been perform ...
Quaternary
... non・volcanic outer arc and a volcanic inner arc. The boundaly between the non・volcanic outer arc and volcanic inner arc is the front of volcanic belt or volcanic front(Sugimura, 1960),which runs parallel with the trench at the distance of 100−300 km from the axis of the trench. ...
... non・volcanic outer arc and a volcanic inner arc. The boundaly between the non・volcanic outer arc and volcanic inner arc is the front of volcanic belt or volcanic front(Sugimura, 1960),which runs parallel with the trench at the distance of 100−300 km from the axis of the trench. ...
Operational Earthquake Forecasting
... Following the 2009 L’Aquila earthquake, the Dipartimento della Protezione Civile Italiana (DPC), appointed an International Commission on Earthquake Forecasting for Civil Protection (ICEF) to report on the current state of knowledge of short-term prediction and forecasting of tectonic earthquakes an ...
... Following the 2009 L’Aquila earthquake, the Dipartimento della Protezione Civile Italiana (DPC), appointed an International Commission on Earthquake Forecasting for Civil Protection (ICEF) to report on the current state of knowledge of short-term prediction and forecasting of tectonic earthquakes an ...
PowerPoint Presentation - 12.540 Principles of the Global
... Plate Tectonics • As with all theories it is not perfect; but it explains much of the behavior of the solid Earth. • Earth scientists ask: How do we test this theory and if it is correct what can it tell us about the behavior of Earth? ...
... Plate Tectonics • As with all theories it is not perfect; but it explains much of the behavior of the solid Earth. • Earth scientists ask: How do we test this theory and if it is correct what can it tell us about the behavior of Earth? ...
Vortex Tectonics: The Primary Factors Which
... began in the 1970’s and has escalated through to today, were these directly proportional to the huge increase in volcanism? In the search for an explanation, I incorporated the work of Charles Whitten, who was the Chief Geodesist for the U.S. Geological Survey for many years before his retirement in ...
... began in the 1970’s and has escalated through to today, were these directly proportional to the huge increase in volcanism? In the search for an explanation, I incorporated the work of Charles Whitten, who was the Chief Geodesist for the U.S. Geological Survey for many years before his retirement in ...
Seismic retrofit
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With better understanding of seismic demand on structures and with our recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged. Prior to the introduction of modern seismic codes in the late 1960s for developed countries (US, Japan etc.) and late 1970s for many other parts of the world (Turkey, China etc.), many structures were designed without adequate detailing and reinforcement for seismic protection. In view of the imminent problem, various research work has been carried out. State-of-the-art technical guidelines for seismic assessment, retrofit and rehabilitation have been published around the world - such as the ASCE-SEI 41 and the New Zealand Society for Earthquake Engineering (NZSEE)'s guidelines. These codes must be regularly updated; the 1994 Northridge earthquake brought to light the brittleness of welded steel frames, for example.The retrofit techniques outlined here are also applicable for other natural hazards such as tropical cyclones, tornadoes, and severe winds from thunderstorms. Whilst current practice of seismic retrofitting is predominantly concerned with structural improvements to reduce the seismic hazard of using the structures, it is similarly essential to reduce the hazards and losses from non-structural elements. It is also important to keep in mind that there is no such thing as an earthquake-proof structure, although seismic performance can be greatly enhanced through proper initial design or subsequent modifications.