The Study On The Rapid Evaluation Method For Seismic Hazard Based On The Ground Motion Parameters

Earthquake is one of the serious natural disasters in the world which canmake great harm to the mankind. At the same time, our country is one of theseriously destroyed countries subjected to earthquake. Hence, it is an urgentmission for us to construct a safe social environment by finding out effectivedefensive countermeasures to avoid and relieve earthquake disaster. Seismichazard evaluation is a quantitative estimation method assessing the lost ofmankind and living condition subjected to earthquake. It is of great sense for therescue scheme, international aid and rebuilding the disaster area to estimate theloss of the disaster area scientifically. At the beginning of the 1980's, our countryput forward a seismic hazard and losing analysis method based on the seismicintensity. This method is still used in the field of earthquake engineering widely atpresent. The study on the evaluation method for seismic hazard based on theground motion parameter is the main research direction in seismic hazardevaluation in recent years which has gained some useful results.This thesis brings forward a method for evaluating the seismic hazard based on theground motion parameters, The method takes use of the least-square method toplot isoline of ground motion parameters taking both the effect of distance tostations and the station directivity into account when interpolating and thecomprehensive weight of the two factors serves as the measure of interpolation.Based on the distance-weighted method the isoline is plotted in this study. Themethod is validated by the regression equation of circle and ellipse and the resultimplies that the method to confirm the distribution of acceleration of groundmotion based on the comprehensive method of weighted interpolation consideringboth the reciprocal of natural logarithm and the direction effect can get bettereffect. Based on the HAZUS99 method, this thesis makes slight change in plottingseismic demand spectrum and structural capacity curve. Differing from HAZUS99which uses damp reduction to get demand spectrum and builds structural capacitycurve by three key dots of structures, this thesis builds demand spectrum by non-elasticity respond spectrum which is reduced by the strength reduction factor andbuilds structural capacity curve according to Push-over theory. In the next step, thebuilding vulnerability is estimated based on the real structural capacity curve usingaccelerate respond spectrum as ground motion input parameter. This thesis hascalculated the probability of the structural exceed or appear vary breakage state toaccelerate respond spectrum parameter and obtained the building vulnerabilitycurve. Furthermore, the building vulnerability matrix corresponding to differentacceleration extents are put forward. At last, the personnel casualty and economiclosing are calculated based on the building vulnerability matrix.The building vulnerability analysis is an important theoretic base for seismiclosing forecast and evaluation. It is also an indispensable part in seismic hazardevaluation. The evaluation method for seismic hazard based on the ground motionparameter in this thesis can be a seismic hazard losing evaluation reference forgovernment and caste.