Test Study On Frame-supported Multi-ribbed Wall Beam And Mechanical Analysis Under Vertical Force

As a new system of structure, Multi-Ribbed Composite Slab Structure is characterized by excellent mechanical and resisting earthquake force capacity. Multi-Ribbed Composite Slab Structure is worth of spreading widely while the study of this system in buildings with large space at the bottom remains blank. The dissertation is devoted to frame-supported multi-ribbed wall beam, the main bearing member in the frame-supported multi-ribbed slab structure with large space at the bottom, and mainly studies its load-bearing performance .First of all, the pseudo-static experiments of four large-scale models of Frame Supported Multi-Ribbed Composite Slab Structure are done. The load-bearing performance and composite action of FSMRWB under vertical load are explored, then the failure procedure and the seismic performances under both vertical and horizontal load, such as failure mode, bearing capacity, deformation features, hysteretic characteristic and anti-collapse performance, are studied. The study considered such factors as span-to-span, height-span ratio of the beam, and cavity etc..Secondly, through simulating concrete and blocks with solid element, bars with link element, and using isotropic hardening model and William-Warnke five-parameter failure rule, the nonlinear finite element method analysis model of FSMRWB is set up, whose rationality is certificated by experimental data. Through the nonlinear finite element method analysis under vertical load, the stress distribution and the influence of span-to-span ratio of the wall beam, height-to-span ratio of the trimmer beam, and the opening in the wall, are simulated. And the distribution proportion of vertical load in different members of the multi-ribbed composite wall is obtained.Last, author drew the conclusion of the FSMRWB performance under vertical force. All in all, FSMRCWB is super on aseismic performance and an ideal structure.