Abstract
When the lateral stiffness of the frame flat column is relatively small, the strength of the frame flat column is not enough to resist the large horizontal earthquake force and seriously deformed, which leads to the structure fail and could not work normally. In order to study the bearing capacity and the deformation capacity, experiments of three specimens of high axial compressive ratio under frequency cyclic loading were conducted, in which the failure process were observed in detail and the failure mechanism of the specimens were researched, the failure type, the hysteretic characteristic were studied, and the effect of the axial compressive ratio, the ties type and the stirrup ratio on the ductility of the members were analysed.
Highlights
The code for seismic design of buildings (GB50011-2010) [1] stipulates that the frame structure of seismic fortification or the frame structure houses with more layers in the non-seismic area should be designed as rigidly connected frames horizontally and longitudinally and calculated
The frame column should be calculated in the longitudinal direction in addition to the bearing capacity and deformation calculation in the transverse direction
The main structure of large thermal power plant, high-rise reinforced concrete structure and other heavy industrial structures are generally subjected to large vertical load, so the action in the longitudinal direction of the frame of the total horizontal seismic action is relatively large [3]
Summary
The code for seismic design of buildings (GB50011-2010) [1] stipulates that the frame structure of seismic fortification or the frame structure houses with more layers in the non-seismic area should be designed as rigidly connected frames horizontally and longitudinally and calculated . In this way, the frame column should be calculated in the longitudinal direction in addition to the bearing capacity and deformation calculation in the transverse direction. Three long flat columns of reinforced concrete frame with high axial compression ratio are tested under repeated periodic load, and the effects of hoop form, hoop ratio and axial compression ratio on the failure form, bearing capacity, hysteresis and ductility of reinforced concrete flat columns are studied
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