Study On Seismic Performance Of Ecological Composite Walls And Preferred Evaluation Based On Change Of Catch-frame Forms

The ecological composite-wall structure is new structure system which have many advantages such as using local materials, excellent seismic performance, short construction cycle, good energy-saving effect and low engineering cost etc. The ecological composite-wall, as a major member, is very important to effects of the whole structure system's seismic performance. The previous study result of the study team can be concluded as follows:These results can be showed that the catch-frame forms have a noticeable impact on seismic performance of the ecological composite walls. Based on the experiment and the finite element numerical simulation analysis in this paper, the seismic behavior and failure mode of the ecological composite wall with three-rib columns have been researched and the regularity which the wall's seismic performance with different the catch-frame forms have been evaluated. On the basis of this, the best catch-frame form is also put forward based on extension superiority evaluation method. The main research contents are summarized as follows:(1) A group of 1/2 scale model of the ECW-2 ecological composite wall with three-rib columns and straw fiber cement-based blocks is tested under low-frequency cyclic loading in this paper. The composite wall's bearing capacity, deformation, ductility, energy dissipation, and stiffness degradation are researched.(2) According to the low-frequency cyclic experimental research on the ecological composite walls with different catch-frame forms including three-rib, four-rib, and five-rib columns, this paper contrast analysis wall's stiffness, bearing capacity, deformability, and energy dissipation capacity's change law with the catch-frame forms(3) Assessment samples have been selected based on the previous study result and the finite element numerical simulation analysis. applied the extension superiority evaluation method which has bearing capacity, tensile and energy dissipation capacity against the wall and the economic multi-factors so as to choose the most excellent catch-frame forms. It provides designing proofs for practical engineering of the ecological composite wall structure.