Study On Analysis Of Ground Motion Parameters In Tianjin Urban District

Tianjin East China metropolis, with the rapid development of economy, demand is also rising for fortification. Through the analysis and study of surface ground motion parameters in Tianjin to establish reasonable security of earthquake disaster reduction planning and selection of seismic parameter plays an important guiding significance. Thesis extension in Tianjin, 200 km of regional seismic activity and study the seismogenic tectonic units, divided into the seismic potential sources, and response analysis of soil layer seismic hazard analysis, and the overall level of fortification in central urban area and parameters were analyzed. Research method is divided into earthquake potential source, and identify the source of potential arguments, using probability calculation method analysis and calculation of seismic hazard analysis, establishment of one-dimensional soil response analysis model and ground motion parameters are calculated. Through this study, research findings and results obtained.(1)Central District of Tianjin seismic parameters near the existing seismic design code for buildings as a whole(GB50011-2010), each parameter of 8, according to current building code for seismic design(GB50011-2010), design Basic acceleration of seismic design of structures for 0.15, will reduce the earthquake fortification level of central urban district of Tianjin.(2)Draws out has Tianjin Center City peak acceleration Division figure, and level earthquake effects coefficient equivalent line figure, and reaction spectrum features cycle equivalent line figure, these to vibrations parameter Division figure take has equivalent line of form draws and into, intuitive to said out has Tianjin Center City different regional of seismic fortification level and parameter take value, both can for overall planning provides according to, and can convenient structure design personnel using.(3)Results from this study can be seen in the seismic ground motion parameter zonation map, zoning map locations and regions of high risk in the 1976 Tangshan earthquake caused serious damage in downtown Tianjin distribution agreement which illustrate the results of this research work and actually, most of the damage is consistent with high practical value.(4)Through the analysis of engineering geological conditions in the center of Tianjin, Tianjin were drawn within 20 metres below the surface in the center of equivalent shear wave velocity contour for determining the partitioning provides the site classification and geological conditions Research Foundation, and also to establish a seismic response analysis of model provides a reference for.(5)In coastal Hexi South area exists with two at more obviously of earthquake moving parameter high value regional, is Tianjin Center City of focus seismic fortification district, preliminary analysis formed this two at obviously high value district of causes and two at concealed fault of cross parts related, by concealed fault of control effects, this two at cross parts of geological conditions more complex, on earthquake moving role produced more significantly effects, further of in-depth research needed in future of related research work in the carried out.