Two specimens of single-layer single span frame structure are designed and cast, including one cast-in-situ concrete frame and one new cast concrete frame.

When the inter story displacement angle exceeds 1 / 50, the bearing capacity still has no downward trend.

Among them, two quasi-static tests were carried out on the cast concrete frame structure.

The second test was carried out after the first test was completed and the energy dissipation reinforcement of the structure was replaced.

The test results show that the bearing capacity and energy dissipation capacity of the new precast concrete frame structure are slightly lower than that of the cast-in-situ concrete frame structure, but the ductility is greatly improved compared with the cast-in-situ frame.

In addition, the residual deformation of the cast concrete frame structure after the first test is about 15% of that of the cast-in-situ frame structure, the component damage is slight, and the structure can be reset independently; The bearing capacity of the cast frame structure in the second test is slightly lower than that in the first test, the residual deformation is increased, it still has a certain self resetting ability, and the structural damage is still slight, which shows that the basic recovery of seismic capacity can be achieved by simply replacing the energy consuming reinforcement..

Magnetic Steel Chamfer

Experimental study on seismic performance of self resetting precast concrete frame structure Liu Hang 1 ， Li Mu 2 ， Yang Xuezhong 1 ， Han Mingjie 1 ， Tian Yuji 21 Beijing Construction Engineering Research Institute Co., Ltd Abstract: a self resetting precast concrete frame structure with new connection joints is proposed.