The Determination Of Ground Motion Parameters And Regionalization Research In Han Zhong

As one of key anti-shock and disaster reduction projects in provincial and civic twelfth Five-Year Plan,Han Zhong seismic micro-zoning will provide the basis for quake-resistant and seismic portificationg of urban planning,urban construction and significant construction project,and improve an ability of defense geologic hazard.The determination of ground motion parameters and the preparation of seismic micro-zoning is an important part of the project,is the embodiment of the grassland,seismic micro-zoning end result,parameter selection is reasonable,zoning division is clear and practical,is related to the application of the promotion.The seismic micro-zoning project values engineering geological conditions of the site.Especially the effects of local site conditions on earthquake ground motion.In this paper,according to 0.01 ° x 0.01 ° grid point of China probabilistic seiesmic hazard analysis methods and calculation,according to the result of calculation has chosen four control points as seismic micro-zoning bedrock input fields.Within the scope of the division according to the 1 km x 1 km grid layout borehole,The drilling sampling test results are dynamic nonlinear characteristics of soil parameters and statistical analysis,according to the topography and geomorphology,seismic micro-zoning field drilling to reveal the formation of structure and soil mechanics test results,establish 107 the soil seismic response model of borehole,calculate and determine the drilling ground motion parameter for the probability of exceedance of 63%,10% and 2% in the future 50 years,finally combining with engineering geology zoning and actual application,obtained the ground motion parameter Zoning map and the ground motion characteristic period of response spectrum Zoning map with the probability of exceedance of 63%,10% and 2% in the future 50 years.The work obtained six Zoning maps of the ground motion parameter and the ground motion characteristic period of response spectrum with the probability of exceedance of 63%,10% and 2% in the future 50 years.