Research And Application On Pseudo-dynamic Test Method With Complex Substructure Based On OpenSees

The proposed pseudo-dynamic test has developed into a substructure pseudo-dynamic test after the introduction of substructure technology.The proposed method not only enriches the pseudo-dynamic test method,but also adds a powerful test method to the seismic research field.According to the concept of pseudo-dynamic test,we can carry out full-scale test of weak layers and vulnerable points in the structure,and use the computer to simulate the remaining part.And then we can combine the two analysis,so that we can get the earthquake performance analysis of the overall structure and the test substructure performance parameters according to the substructure test.Compared with other traditional seismic test methods,the substructure pseudo-dynamic test method has obvious advantages,which can not only save the test cost,but also reduce the requirements of the laboratory hardware conditions.Moreover,it can integrate the resources of different places better,improve the utilization of resources rate and response to sustainable development with the network collaborative test.On the basis of this method,the author of the thesis exploited the substructure pseudo-dynamic test method and program combined with OpenSees finite element software which is open-source.This thesis taking OpenSees as core computing platform and discusses the substructure pseudo-dynamic method theory,like the realization of the program,the choice of numerical integral method,the boundary condition processing,the device signal conversion and so on.And combine with the current research status---the scope of application is limited to simple component testing the author studies the complex substructure of the frame structure system,and discusses boundary condition simulation,program implementation,data transmission and other methods when the partial structure system is the experimental substructure.So that on this thesis,simulation method of complex boundary conditions is discussed when sub-frame is separated from global structure as physical substructure and thus the problem of OpenSees blocked by remained geometrically unstable numerical substructure is solved.At the end of this thesis,the feasibility and validity of the proposed substructure pseudo-dynamic test method are proved with two virtual tests,one is a 5-bay 12-story steel frame with buckling strained braces in which a 1-bay 1-story frame is separated as physical substructure,and the other is a 3-bay 8-story reinforced concrete frame with a 1-bay 3-story frame substructure.