Hysteretic Behavior Of Composite Steel Frame(Weak Axis Of Column) With PR Connection- Reinforced Concrete Infill Shear Wall Structural System Under Cyclic Loading

A composite steel frame-reinforced concrete infill wall(abbreviation:SRCW) is a new composite structural system. Based on the experiments of SRCW, the results show it offers significant advantages as an earthquake-resistant structural system for building located within regions subjected to earthquake. Besides, the relevant investigation of SRCW is vacancy in our country, So the study on hysteretic behavior of composite steel frame-reinforced concrete infill wall structural system under cyclic load have significant effects on its theory and practice.According to the research development state of SRCW, the primary part of this thesis was selecting a composite steel frame(weak axis of column)-reinforced concrete infill shear wall structural system as the subject to be studied Based on the research achievements of SRCW combine with the relevant structural specification of our nation, a six-story prototype structure was designed and a specimen of two-story and one-bay with PR connection of steel beam-to-column adopted was built, which represented the bottom tow stories of the prototype structure at one-third scale approximately. The cyclic loading test was conducted on the specimen to investigate the hysteretic performance of it.The result of test showed the structural system provided sufficient strength to resist the design lateral load and ample rigidity to control system drift. The system performances were utilized fully on the base of interaction of steel frame and RC shear wall by connection of shear stud. At the design lateral load, approximately 80% of the lateral shear load was supported by RC shear wall and approximately 80% the overturning moment was carried by steel frame. The ultimate capacity of the system was influenced by some factors, such as the composite effect of partial concrete-encased steel column, the PR type of steel column(weak axis of column) to beam connection, the ductility of shear stud, the joint of the horizontal and vertical reinforcing cages, the material properties of concrete and the reinforcement ratios of RC shear wall et al. So a series of principal conclusions were desired.Secondary, combined the achievements of other researchers with the analytical results of the test, the plastic failure mechanism for the Specimen was built. Moreover the thesis including the exploratory development of the finite element program for the specimen. There are much difficulties for the special properties of concrete and its constitutive theory disadvantages. On the base of relevant theories and research achievements, the program for analyzing the hysteretic behavior of the specimen was achieved. It show the numerical simulation agree well with the result of the test. More over, according to importance of structural design parameters, a series of specimens were designed and computed to learn about their effects on the structural hysteresis behavior and failure mechanism. At last, some drawbacks in the program and the theory of concrete need to be improvement and settled were offered. However, it provided the limited theoretical basis for further research on the numerical simulation of SRCW and concrete.All in all, the research on hysteretic behavior of composite steel frame(weak axis)-reinforced concrete shear wall structural system under cyclic loading is rather comprehensive and systematic, which might be useful for revising design code, guiding design in building, and lay sound foundation for further study seismic behavior of SRCW.