For shallow dip slip or thrust slip fault, amplitudes of strong ground motion are still distributed in a narrow region, but the region deviate the project of the fault on the surface, the deviation distance is related to the dip angle of the fault.
Study on strong ground motion is a key research field in the intercross area of engineering and earth science, and is also an urgent requirement of ensuring stabilization and progress of mankind society & reducing earthquake disaster.
In this paper, some information about the strong motions of Izmit M7.4, Turkey, earthquake is introduced, which occurred on 17th August 1999. In order for application of engineering, the analysis and discussion are carried out for the distribution of intensity, the attenuation relation of PGA, the acceleration spectra and its character parameters, the duration of the strong motions, etc.
We use the proposed methods to analyze an acceleration record of the strong aftershock in the Lijiang MS7.0 earthquake in 1996, and therefore achieving a better understanding of strong motion characteristics.
For a give seismic intensity rating, the network formed with actual strong ground motion records directly produces the corresponding peak ground parameters and the effects of earthquake magnitude and epicentral distance are included.
The state-of-art of random process simulation model research of strong ground motion are analysed and the shortcomings of previous models is pointed out in this paper.
The dynamic strains of the embedded culvert models and the seismic soil pressure acting on the models due to sinusoidal and random strong motions were investigated.
Significant engineeringcharacteristics of the near-field strong motions are discussed, with particularemphasis on the site conditions, rupture directivity effects and transversecomponent orientations relative to the fault.
In order to evaluate site effects in the near-field strong motions we estimate S-wave velocity structures of sediments at four sites using array records of microtremors.
This paper discusses the principle of a large-aperture equal-thickness-fringe Fabry-Perot interferometer. Its merits include a relatively low requirement on optical material, high resistance to disturbance and vibration, and high accuracy of fringe location. A transient interferometer has been developed which has a large aperture and can operate in an environment with strong vibration. Interferograms of combustion flames and rocket exhaust plumes were obtained by using this interferometer.
This paper which consists of four parts synthesizes the study ing tendency on ground measurement and strong motion in Japan, with an aim of pointing out the importance of this study. These four parts include, I, survey of ground measurement and its development. Ⅱ, survey of strong motion and its general situation. Ⅲ, application of strong motion research. Ⅳ, prediction of ground strong motion. Nowadays,the land use of cities and their neighbourhood is much more and more complicated, besides, the structure o...
In this paper,by considering the characterristics of low cycle fatigue of RC structures,an estimation model of earthquake damage with the damage parameter of the degradation stiffness ratio is pro posed, which reflects not only the damage of large deformation, but also the effects of accumulated damage. Futhermore, using this estimation model, the influence of strong motion duration on accumulated seismic destruction to RC structures is studied in this paper . The anlysis results indicate that for long dura...
强地震动
strong ground motion
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