Discussion on the shear performance of four-sided simple reinforced concrete laminate

laminated plates;  shear stress;  Model

The secondary stress test of 13 four-sided simple support superimposed rectangular plates under concentrated load was carried out, and the force performance of the four sides was systematically analyzed, and the isoshear stress line model of the superimposed surface was proposed. The test results show that the bearing capacity of the laminated plate is not lower than that of the whole cast plate with the same conditions. The concrete strength of the two stages of concrete in the laminated plate is lower and has control over the bearing capacity of punching and cutting. It is suggested that the composite surface of the laminate plate can adopt a natural rough surface, and in the shear design of the laminate, in addition to meeting the calculation of the bearing capacity of the punching cut, the shear stress on the superimposed surface should also be verified according to the given shear stress formula.