Seismic Performance Research On Steel-Concrete Model Structure Based On Shaking Table Tests

ABSTRACT:With the rapid development of economic construction, more and more hybrid structures are used in high-rise building structures, steel-concrete hybrid structures have become one of the main structural forms of high-rise buildings in China. However, due to the lack of information on hybrid structure damage during earthquakes, its seismic performance and stress analysis needs to do further research. In this paper, the seismic performance of a1/4scaled steel frame-shear wall model structure is analyzed based on shaking table tests, in terms of the dynamic characteristics, stress distribution and displacement and acceleration responses, etc..The main contents include:1) Based on a completed steel frame-shear wall hybrid structure tests, the dynamic characteristics, displacement, acceleration and strain dynamic time history responses of hybrid structure are analyzed. With the increasing of input peak ground acceleration, the cracks of model structure are developed, plastic deformation is increased, the whole structural stiffness is degenerated, and then the result of the damage evolution rule of model structure is obtained.2) Incremental dynamic analysis is a kind of parameter method based on the dynamic elastic-plastic time history analysis, it is applied to study the seismic performance of the test structure. Analyzing the change rule of incremental dynamic analysis curves combining the damage phenomenon of hybrid structure, it gives three kinds of limit states of model structure and the interlayer displacement angle limit.3) The basic principle of seismic vulnerability analysis is introduced. In combination of the existed shaking table tests data, the vulnerability curves of model structure are obtained. Through analysis of vulnerability curves, it is concluded that the exceeding probability of different limit damage states of model structure, at the same time, the seismic performance of test structure is evaluated. Finally, the sensitivity of seismic vulnerability parameter is analyzed.