Study On Earthquake Resistant Behavior Of Steel And Polyurethane Composite Shear Walls Frame Structure

Polyurethane, as a high-performance material, has some superior characteristicsincluding good adhesion properties, high ductility, light weight and simple construction, andhas been more and more applications and development in shipbuilding, marine and civilengineering. Based on this material, in this paper, a new type of composite shear wallstructure, which is formed through pouring polyurethane into the cavity around by bothsides of steel plate and frame, referred to as steel frame-steel plate and embeddedpolyurethane composite shear wall(SPCSW), is put forward. Theoretical analysis and finiteelement simulation are employed in this paper to study the performance of this new typestructure. The main contents are as follows:(1) Taking into account that this new type of composite shear wall is built on steel plateshear wall(SPSW), two experiments about SPSW are simulated by finite element analysissoftware ANSYS. The test results are compared including mechanical mechanism,hysteresis performance, bearing capacity and energy dissipation capacity and so on.Validating that using the finite element method to simulate SPSW is reliable and suggestingthe finite element method is suitable for the simulation of seismic performance of SPCSW.(2) Ordinary steel plate shear wall prone to producing buckling wave under the force,and this phenomenon can reduce structural hysteretic behavior and energy dissipationcapacity. In order to analyze the influence of polyurethane when it is poured into steel plateshear wall, comparison between the new type composite shear wall and ordinary steel plateshear wall was analyzed by ANSYS finite element software in terms of the hystereticbehavior, structural deformation and energy dissipation capacity. The results prove that thisnew composite shear wall structure has a better anti-seismic property.(3) Based on the reasonable test validation, the numerical simulation method iscomprehensively studied for this new type of structure. Considering that the beam-columnjoints of outer steel frame can be divided into rigid and hinged, three parameters includingheight-to-thickness ratio, span-to-depth ratio and stiffness coefficient of column, aredesigned and compared for SPCSW. The regulars under cyclic loading rules can be get, andthe best states can be found, and suggestions for design of the structure can be put forward.(4) Referring to the study about the simplified model of SPSW, a suitable simplifieddesign method for SPCSW is put forward. On the basis of numerical simulations in different parameters, two different height-to-thickness ratio and two span-to-depth ratio of the shellelement models of SPCSW respectively simplified and analyzed. Considering that thenumber of strut-to-tie rods have an influence on simplified structure, the optimum structureof the simplified model under various conditions can be obtained, which can guide thedesign of simplified structure for later study.This new type of structure based on polyurethane is the innovation of this paper, and itis a new structure for civil engineering. Theoretical analysis and numerical simulation forSPCSW are conducted in the paper, offering a good reference for the future studies aboutthis kind of structure. Some corresponding recommendations are also provided in the paperfor the design of this structure.