Analysis On The Box-shaped Joint Experiment Of Reinforced Concrete Mega-frame Structure

The seismic capacity of the box-shaped joint in the reinforced concrete mega-frame structure system is studied, and the finite element analysis is done with ANSYS . In this thesis ,the study is focused on the following aspects:1.Study on the box-shaped joint experiment of reinforced concrete mega-frame structureAccording to the reinforced concrete structure design for the Sichuan airlines tower, aiming at the mega-frame structure system , the failure mechanism and the earthquake resistant capacity of the joint between the tube columniation and the box-shaped beam have been studied .Two joint models are tested. The deformation of the specimens ,the reinforced bar stress and strain alternation are depicted. The course from the crack emerging, steel yielding to the hinge turning-up are described qualitatively.2.The analysis on the box-shaped joint of the mega-frame structure with ANSYSIn order to obtain the basic deformation and the internal force , know the status of force more deep and forecast the destructive shape of the specimens , the analysis is done with ANSYS software. The case that the concrete splitting , steel plasticity yielding to joint deforming of the box-shaped joint under the common action of the pulldown and the force on beam extremity are analyzed. The differences between the result of the ANSYS calculation and the result of test data are compared .3. The seismic design and plastic hinge energy dissipation theory for reinforced concrete mega-frame structuresOn the basis of the result of the experiment and the result of the finite element calculation, the overall idea of the seismic conceptual design and the rational plastic hinge mechanism for reinforced concrete mega-frame structures are presented. some conclusion with important reference value to design mega-frame structure has been proposed either.Through the analysis and the contrast between the FEM analysis and the result of experiment, it is proved that the coupling beam designed by the ductility measure could not be used as the energy dissipation member in mega-box-shaped column. That is an important conclusion in this thesis . The realization of the thinking of seismic conceptual design and rational plastic hinge mechanism needs further study.