RESEARCH ON STATIC PERFORMANCE OF SANDWICH COMPOSITE SHEAR WALL COMBINED WITH CEMENT FORMWORK AND CONCRETE

摘要

In response to the call of “building energy efficiency”,based on the results of preliminary studies,a sandwich composite shear wall structure of “cement formwork/concrete/cement formwork” is proposed in this research.Through biaxial loading experiments of composite shear walls with different formwork support patterns,width-to-thickness ratio and axial compression ratio,the carrying capacities,deformation properties and failure modes under static load,as well as the cooperative performances between formwork and concrete are studied; through the comparative experiments of general shear walls with traditional timber formwork and traditional support pattern,the working performances of the traditional shear walls and composite shear walls under static load are compared and analyzed,and the combination enhancement action of cement formwork to concrete is presented.The experiment results prove that the sandwich composite shear walls of cement formwork and concrete have good working performances.Combined with experiment data,reasonable finite element model of composite shear wall specimens is established and the relevant calculation parameters are determined,simulation results and experiment results are in good agreement; it can provide a gist for analyzing the mechanical behavior of this type of structures by finite element simulation in the lack of experiment data.