Experiment Research On Seismic Performance Of Framework Joint Connected With Strengthening Planting Bar

In recent two decades, many domestic scholars have studied the seismic performance of reinforced concrete frame joints. But most comparative analysis of seismic performance is followed by reinforcement and strengthening. For additional layer of reinforcement in the transformation, it is empty fields that connecting through the formation of inorganic materials the anchorage of the seismic performance of frame joints. With the increasing emergence of adding-layer building, the use of inorganic materials to form anchorage connector framework seismic performance study is particularly important.Before the test, the effect of inorganic anchorage materials graft reinforcement is firstly researched. Analyze the force relationship of single anchor between group anchors.This paper observes the failure pattern, analyzes the P-f curve of all specimens in order to the reduction factor of group anchor capacity which lay the foundation for anchorage framework node design.This issue conducted the low cyclic reversed loading test of3group framework joints formed by inorganic anchorage materials and1group the one formed by integral concreting. This paper study the seismic performance, analyzed the advantages and disadvantages of the anchorage programs. The follow conclusions:(1) Bearing capacity of the anchorage area in the program are higher than the theoretical value, there is small difference between the framework joints formed by inorganic anchorage materials and the one formed by integral concreting.(2) The beam end displacement of integral concreting program is smaller. When it comes to the cracking load, there is no difference between the framework joints formed by inorganic anchorage materials and the one formed by integral concreting.(3) With the beam end displacement increasing, the hysteretic curve shows that the framework joints formed by inorganic anchorage materials have a larger residual deformation after the bar yield, but it is still meet the basic requirements of seismic performance. Such as the use of other treatment measures (such as bonding carbon fiber steel, stick etc.)Seismic effects would be better.(4) In the ductility, the average of power ratio index of the framework joints program formed by inorganic anchorage materials is slightly higher than the one formed by integral concreting in small phase shift. But in the post yield displacement stage, the former is slightly higher than the latter in energy dissipation capacity.(5) At the end of the test, large specimen deformations were founded. The steel had severe deformation on beam-column junction of each specimen. Most concrete outside of beam main steel fell. The concrete inside of main steel had cracked when it beard staggered tension and compression stress. This phenomenon belongs to the ductility failure.