Experimental Study on Friction Performance of Integral Prefabricated Prestressed Slab-column Joints

WU Lili, WANG Rui, XIE Linghui, JIA Lina

Abstract

The influences of cement-based material (such as fine aggregate concrete) strength，prestressing，additive admixture and other factors on the friction performances of the integral prefabricated prestressed slab-column joint structures were analyzed through experimental study on 6 joints. The difference between the slab column joints with and without fine stone concrete cement material was also compared. The results show that fine stone concrete at the slab column joints can significantly improve the friction performance. The friction performance was increased by more than 35% when compared with that of the joint specimen without filling materials. Cement material strength，prestress and additive admixture can affect the friction performance of the node to various degrees. When the cubic strength of the fine aggregate concrete increased from 30 MPa to 40 MPa，the friction performance at the joint interface increased by about 9.8%. When the prestress increased from 300 kN to 450 kN，the friction performance of the joint interface increased by around 55.1%. The expansion agent can also improve the friction performance of the joint interface，but the effects are just a little.

 

 

Keywords: integral prefabricated,  slab-column joints,  friction performance,  prestressing,  additive admixture


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References


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