In order to study the crack resistance of lithium slag recycled concrete beam-column joints

seismic performance tests were carried out on six lithium slag recycled concrete joints

and the effects of the section height ratio of beams and columns

the content of lithium slag and the stirrup ratio in the core area on the crack resistance of the joints were analyzed. The results show that the cracking load of the lithium slag recycled concrete beamcolumn joints increases with the increase of the hoop ratio in the core area. The addition of a proper amount of lithium slag can increase the cracking load of the specimen. With the increase of the section height ratio

the cracking load value increases

but the appropriate amount of stirrups in the core area can weaken its influence.Finally

based on the formula for calculating the cracking load of ordinary concrete joints and revising the relevant coefficients

a formula for calculating the cracking bearing capacity of the lithium slag recycled concrete beamcolumn joints is proposed. The experimental values are in good agreement with the theoretical values.