Technical Researching Of Generating Non-stationary Ground Motion Time History Of Response Spectrum Compatible

In recent years, along with the rapid development of economic construction in China, there are more and more high-rise buildings, super high-rise building, large-span bridge construction and special construction and so on. The higher request is put forward in the current seismic design. In the process of seismic design of the complex and important building, it should be considered in dynamic analysis of structures through the whole process of ground motion. So it's need enough ground motion time history which can fit certain earthquake environment and the site conditions as the inputting of dynamic structural analysis. It mainly come from two ways: seismic record with actual observation and artificial ground motion time history. with the restriction of strong earthquake observation condition, current seismic records are hard to meet the requirement of the seismic design, so it should be offered that more artificial ground motion time history which could meet different site conditions and earthquake environment.The fitting response spectrum is a basic task of artificial ground motion time history, there are many scholars offer many kinds of way. This text offer a technique to generate totally non-stationary ground motion spectrum with non-stationary phase as the consideration of site conditions and earthquake environment and it is on the base of traditional technic which only take consideration of non-stationary amplitude to fit target response spectrum. This new way using non-stationary which is picking from the actual observation record can reveal the macroscopic property of artificial of ground motion time history and raise accuracy, so this way can truly reflect the influence of the site conditions and earthquake environment.There are three research in this text:The first, compiling and adjusting the response spectrum fitting computer procedure of artificial ground motion time history and get the amplitude spectrum and phase spectrum from actual ground motion record with numeric calculation, input the amplitude spectrum and phase spectrum to the computer procedure to offer the totally non-stationary ground motion time history. With that, the work step and important issue of non-stationary ground motion time history of response spectrum compatible are also offered in the text.The second, In order to meet the requirement of important projects for design ground motion, a new artificial ground motion technology was researched to consider non-stationary phase from earthquake record near site and to fit compatible PGA, PGV, SA(T) simultaneously. This new technology is applied to generating the non-stationary artificial ground motion which obtained from the strong motion record of this region. The result of the paper can supply an example and foundation for the engineering application of artificial ground motion response-spectrum.The third, using the new technique of non-stationary ground motion time history of response spectrum to generate the ground motion time history of Tianjin area which can reflect the site character of Tianjin.It means that pick the non-stationary phase from the ground motion record of Tianjin site to generate artificial ground motion time history which could reflect the site character and earthquake environment of Tianjin site. It can give service to seismic design of Tianjin area.