Research On Large-scale Substructuring Test Method For High-rise Steel Structures With BRB

Based on the theory of distributed substructure pseudo-dynamic test, distributedsubstructure pseudo-dynamic test method of high-rise steel structure with BRB wasstudied in this thesis. A secondary development based on OpenSees (an open sourceframework for finite element software), and using Tcl (a general purpose scriptinglanguage) was accomplished to carry out distributed substructure pseudo-dynamic teston such structure. And a virtual test case of twelve stories steel structure with BRB inthe last chapter had demonstrated the feasibility of test method and correctness of theprocedure. The detail research contents of thesis are as follows:Firstly, as the basis of the pseudo-dynamic test method, numerical integrationmethods were described in detail. Through discussion on methods and formuladerivation, predicting correction integration method is supposed to be an idealnumerical integration method in case of that the simulation of numerical substructureis computed using existing finite element software. The virtual test case in the lastchapter using PC-Newmark method had demonstrated that the precision and stabilityof such algorithm could meet the test requirements.Secondly, according to the characteristics of the high-rise steel structures withBRB, the feasibility of distributed substructure pseudo-dynamic test was discussed indepth. A new calculating formula of the governing equation was given with newphysical significance by transposing the original one. In consequence, boundaryconditions of the joint which sharing with test substructure and numericalsubstructure were studied, including the displacement boundary condition and theforce boundary condition.Thirdly, the required functions in OpenSees to carry out distributed substructurepseudo-dynamic test for high-rise steel structure with BRB were introduced, and withspecific Tcl script code snippet given.Fourthly, to demonstrate the feasibility of the test method, a virtual distributedsubstructure pseudo-dynamic test for high-rise steel structure with BRB wasconducted, combined with specific instance. Compared with the numerical analysis of the integral structure, the results show that the procedure was reliable for seismic test.At last, the source of error of virtual test was discussed.