Analysis On Internal Force And Design Method Of Frame-Supported Multi-Ribbed Wall Beam Under Vertical Load

Multi-ribbed slab structure is a new structural system, characterized by energy-saving and good aseismic performance, whose development prospect is very good. Though much fruitful progress has been achieved in previous study, there still remains a lot to be studied and perfected as a new structural system. The thesis is devoted to studying on the multi-ribbed composite wall beam, which is the main bearing member in multi-ribbed slab structure. On the basis of the previous researches, experiments, theoretical analysis and numerical simulation by finite are employed to study the load-bearing performance. The performance and influencing factors of the Frame-Supported Multi-Ribbed Wall Beam under the vertical load were studied. The main contents are presented as follows:1. The pseudo-static experiments of four large-scale models of Frame-Supported Multi-Ribbed Wall Beam are done. The load-bearing performance and composite action of Frame-Supported Multi-Ribbed Wall Beam under vertical load are explored. A study of the Frame-Supported Multi-Ribbed Wall Beam under the vertical load steel joist and the internal stress; on the wall-beam span of the ratio, joists and wall panels than high-factors such as the opening of ribbed frame Compound wall-beam force investigated.2. 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 FEM analysis model of The box-ribbed wall structure in the wall-beam is set up. In the vertical load, the wall-beam on the main influencing factors: the high joist span ratio, the high-wall ratio, modulus of elasticity of wall joists and concrete modulus of elasticity ratio, and its opening position the impact of such a finite element analysis.3. The Frame-Supported Multi-Ribbed Wall Beam is a complex form of a new type of composite structure, on the Frame-Supported Multi-Ribbed Wall Beam under the vertical load force and the load calculation mechanism to further investigate, and then proposed the joists internal forces formula using trigonometric series analysis based on the elastic foundation beam, for the Frame-Supported Multi-Ribbed Wall Beam of the design provided a theoretical basis.