Research On Compression-resisting Behaviors Of Energy-Saving Block & Invisible Multi-Ribbed Frame Structure Wall

Energy-saving block & invisible multi-ribbed frame structure is a new structural system, characterized by low weight,energy saving,sound insulation,environmental protection,low cost. It developed on the basis of small-size concrete hollow block structure and reinforced masonry structure, which be using for multi-storey and high-rise residential building. Through experiments and theoretical analysis, the load-bearing performance, failure process and failure characteristic, deformation performance, bearing capacity and influencing factors of the energy-saving block & invisible multi-ribbed frame structure wall under axial load and eccentric load are father analyzed, which laid foundation to correct design and calculation for the structure. The paper main research work and results are described as follows:Three groups(two walls in one group)1/2-scaled model experiments of the energy-saving block & invisible multi-ribbed frame structure walls with different heights under vertical axial-load are presented; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall are analyzed; the factor such as ratio of height to sectional thickness of the wall are discussed; the effect and correlation of different part of the wall under compression, the axial force distribution among multi-ribbed frame columns and blocks are analyzed, which provide an important support for establishing the calculation formula of axial force bearing capacity of the wall.Four groups (one wall in one group)1/2-scaled model experiments of the energy-saving block & invisible multi-ribbed frame structure walls with same size and reinforcement under vertical eccentric-load are presented; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall are analyzed; the influence of eccentricity on the wall's bearing capacity,load-bearing performance and deformation performance are discussed; and the calculation formula of eccentric force bearing capacity of the wall is proposed.The nonlinear finite element analysis is used to study the load-bearing performance of the wall under axial load and eccentric load. Aimed at different analysis contents, different calculating models are proposed, and the rationality and precision of models are proved by test data. Meanwhile nonlinear finite element analysis is employed to analyze the stabilization of the wall under vertical axial-load, a calculation formula of stabilization coefficient is proposed, then the axial capacity calculation formula of the wall is proposed. By adding parameters, nonlinear finite element analysis is employed to analyze the bearing capacity of the wall under vertical eccentric-load, and the precision of the calculation formula of eccentric force bearing capacity of the wall is proved.The Normal section design methods of the wall under vertical load are discussed, which include calculation formula and concept design method.