Anti-Seismic Research on the Technology of Adding Steel Storeys on the Top of Frame-Shear Wall Structure

Directly on the concrete structure due to the steel structure , light weight, seismic performance , plus steel structures are increasingly being applied to practical engineering . The current seismic design specification no clear provisions on the added layer transformation after the formation of the hybrid structure system , and research at home and abroad , mainly in the specific instance of Engineering as the background , there are some limitations . In view of the above , the papers in the reinforced concrete frame . Seismically Retrofitting transformation shear structure problems encountered as a starting point , combined with the different parameters of the calculation model , using finite element analysis program to the overall structure of the the added layer structure system seismic performance analysis , looking for a general rule, for future reference the designer . The main contents include: ( 1 ) frame - shear structure plus layer Seismic response analysis: the added layer design of the renovation project , due to the upper and lower structural materials of different qualitative structure overall damping ratio is set to a value is not reasonable , the structure of the overall damping ratio of the overall damping ratio calculated strain energy ( energy law ) , the response spectrum analysis of the structure of the added layer and more time in the case of earthquakes analysis . (2 ) the impact of the seismic performance of the frame - shear wall structure plus layer system factors analysis : from layers of steel structure construction , different forms support , support different layout position , the stiffness of the column foot factors start plus layer structure of a comprehensive analysis of the overall seismic performance development and its design method for the renovation project of the superstructure, adding steel layer to provide a reference . ( 3) the study of the seismic performance of energy consumption of eccentric supporting the steel structure of the added layer : eccentrically braced steel plus layer system strong earthquakes have better ductility and energy dissipation capacity , is a very suitable seismic structure of strong earthquakes in the region system has great practical significance .