The Expand Ecological Composite Wall Seismic Performance Analysis And Shear Bearing Capacity Research

With the development of new building materials and structure diversification, the improvement of residential construction safety reliability and structure to further improve the aseismic calculation theory, based on the traditional ecological base composite wall structure system, expanding ecological composite wall structure system is put forward. Embedded blocks, rib beam and column, the outer frame component materials and form optimization of the ecological composite wall in the system can be adjusted flexibly according to actual engineering, with ecological and environmental protection, earthquake shock, construction industrialization, short construction period, and many other advantages, solved the wallboard set bearing, palisade, energy saving as one of the technical problems. In this paper, through test research, theoretical analysis and numerical simulation, the seismic performance of the development ecological composite wall type and shear bearing capacity is studied, put forward the wall unified formula for calculating the shear bearing capacity for inclined section,for the new type of structural system applied to provide theoretical basis for a wider range of areas. The main research contents and results are as follows(1)Combining with experimental study on the development team relevant five 1/2scaled model expanding ecological composite wall of horizontal low cyclic, Comparison of different types of the ecological composite wall bearing capacity, hysteretic characteristics,ductility, stiffness degradation and other seismic performance. Results show that the wall body as a whole under horizontal load, block and ribbed lattice column, border mutual constraint, mutual support, work together, give full play to their respective properties, wall damage according to the basic "block- ribbed lattice- frame column" mode, give full play to each component of the energy dissipation capacity; From yield to destruction, the wall’s skeleton curve flat without mutation phenomenon, the walls are experienced elastic,elastic-plastic, destroy the three stages, wall failure modes are characterized by shear destruction, belong to the reasonable failure mechanism.(2)On the basis of experimental study, using ABAQUS established five expanding ecological composite wall nonlinear finite element numerical model, and carries on the static elastic-plastic analysis, the calculation results with the test results in the load- displacement curve fits is well, verify the validity of the finite element numerical simulation. On this basis,further combining with the finite element numerical model affecting the expansion type of the ecological composite wall shear bearing capacity of the key performance parameters(axial compression ratio, aspect ratio) are analyzed in numerical extension, for subsequent analysis provide theoretical basis for influence factors of the wall inclined section bearing capacity.(3)Through experiments and finite element, analysis mechanical characteristics and failure mechanism of expand the ecological composite wall,and on account of the main factors influencing the wall of oblique section shear bearing capacity of systematic analysis;Based on the Shear-Friction theory, make the simplified model to calculate the shearing of the wall,combining force equilibrium condition, and the expanding ecological composite wall is deduced formula for calculating the shear bearing capacity for inclined section. The test results and the formula calculation showed that the results of the analysis model can better reflect the development type of ecological limited bearing capacity of composite wall features,and can be used for different types of the expanding ecological composite wall ultimate bearing capacity calculation.