Experimental Study Of Pile-Soil-Frame Structure System Model For Dynamic Characteristics And Analyses Of Aseismatic Capability

Now the difficulty in the research on soil-structure interaction problem is lacking the necessary practical data. Therefore there is a lot of uncertainty while analyzing in interaction, limited its application in actual engineering design. So, the very important respect of the soil-structural interactive studies is carrying on big scale model site test and earthquake observation of model and actual building. Combine the national fund subject of natural science"the foundation-base-top structure interaction system dynamical characteristic research"(NO.50278033), Based on the large-scale model test on pile-soil-basic frame structure, has carried on the experimental study and computational analysis of the numerical simulation to the soil-structure interaction.The main research contents are as follows:1. Adopting the analytical method in the time domain and in the frequent domain, the test data of the pile-soil-frame structure that tests of dynamical characteristic of the structure system has been analyzed and got the dynamical characteristic parameters of the large-scale pile-soil-frame structure system: the basic frequency and the damping ratio. The various tendencies of the basic frequency and the damping ratio of the pile-soil-frame structure system model has been analyzed with the top structure quality increase.Through the drawn and released shaking test data has been analyzed and got the first steps damping ratio and the second steps damping ratio of the pile-soil-frame structure system model.2.Through comparing with the test data and analysis results of the pile foundation (box foundation)-soil-frame structure system model, the impact on basic frequency and damping ratio of the structure system in different basic forms has been analysed.3. To research the basic problem on pile-soil-frame structure interaction system went on finite element making model.and set up a three-dimension pile-soil-frame structure model Adopting MSC.Marc simulative computational calculate, got the interaction system of drawn and released shaking time course curve and the top stable state shaking time course curve with the test result identical and better, indicate calculation model and computing technology adopted are rational and feasible.4. Mode analysis has been gone on in the linear elasticity range to no considering and considering interaction models, got the first three stepses of the mode frequency and shaking type of the two kinds of calculation model. When the top...