An experimental program consisting 1 / 4 scale model shaking table test of a 4-story 2-room single-span frame-shear wall structure adopting discretely connected precast RC diaphragm (DCPCD) was conducted to evaluate the dynamic characteristics and seismic responses of DCPCD building structures. Performance of the specimen was evaluated in terms of the structure’ s failure mode, acceleration and displacement responses, in-plane deformation of the floor and in-plane rigidity through shaking table test under different seismic conditions. The test results show that the DCPCD shows good working performance, and can work well in coordination with the lateral force resisting structures. The structure presents the hinge-out sequence and failure mode of a typical frame-shear wall structure. The natural frequency of the structure decreases with the increase of the seismic level peak ground acceleration (PGA), and the damping ratio increases with the increase of the seismic level PGA. In the elastic stage, the first-order mode of the structure is dominated by the overall lateral deformation, accompanied by a certain in-plane deformation of the DCPCD. As the seismic level PGA increases, the in-plane deformation of DCPCD becomes more obvious in the later stage of loading, the structure shows some torsional response; and the cumulative damage of the structure has become more serious in this stage, while the horizontal vibration synchronization of the lateral force resisting structures is gradually reduced; DCPCD in the test model does not meet the definition of rigid floor in domestic and foreign standards, and it is recommended to consider the influence of the in-plane deformation of the diaphragm on the dynamic characteristics and seismic responses of the structure in engineering applications. © 2023 Science Press. All rights reserved.
