Experimental Research On The Effects Of Load-bearing Performance About Srhc Beam-to-column Corner Joint With Different Stirrup Ratios

With the development of the modern architecture, the height and span of buildings has been increasing continuously, the traditional structure of reinforced concrete, however, can not meet the needs of structure's developing. Although the widely applied reinforced concrete of high strength can strengthen the load-bearing capacity, reduce the cross section scale effectively and help construct high-rise or super high-rise buildings, its unsatisfactory ductility and brittleness can not be ignored. The steel reinforced high strength concrete structure refers to a kind of new structure that the steel is placed in the structure of reinforced high strength concrete. The steel reinforced high strength concrete structure combines the respective advantage of steel and the reinforced high strength concrete, which can help save steel, reduce the dead load and improve the ductility of reinforced concrete that leads to the brittleness hampering seismic buildings, therefore, there is great potential and room for the development of this kind of structure. In recent years, a series of studies have been carried out concerning the joint of the steel reinforced high strength concrete structure in Xi'an University of Architecture and Technology, Tongji University, Southeast University and Chongqing University etc. However, rare studies involve corner joint, and hereby the present thesis investigates the seismic behavior of the corner joint.Through conducting tests of steel reinforced high strength concrete corner joint with concrete strength varies from 90.0MPa to 87MPa, designed according to the principle of"strong structure, weak joint", under low cyclic reversed loading, this thesis analyzes the characteristics of the load-bearing of steel reinforced high strength concrete structure joints, figures out the failure patterns, hysteretic curves, skeleton curves, ductile coefficients, energy dissipation, strength degeneration, deformation constituting rule and the degradation of bond stress of steel reinforced high strength concrete structure joints with different stirrup ratio and on this basis explores the influences of the stirrup ratio on the seismic behavior of the corner joint. Last, the suggestions on studies of the seismic behavior of the steel reinforced high strength concrete structure joint are put forward based on the findings of the present paper.