Experimental Study on Elastoplastic Static Behavior of Steel-Concrete Composite Hollow Sandwich Plate
This paper took steel-concrete composite hollow sandwich plate as the research object, built a full-size test model to test the elastoplastic static behavior, and obtained the structure deformation and failure mechanism of steel-concrete composite hollow sandwich plate. The crack development and distribution on concrete pavement were observed, which provides a basis for the design and promotion of steel-concrete composite hollow sandwich plate. On the basis of test, the finite element software was adopted to simulate and analyze the test process. The results show that the steel-concrete composite hollow sandwich plate has enough elastoplastic bearing capacity, and the overall deformation displays a bowl shape, similar to that of traditional floor. From the failure test, it is found that the shear key of steel tube at the support is obviously deformed by tension and compression, the upper and lower chord of side-span steel show buckling failure, and the cracks of surface concrete plate mainly concentrate on the top surface near support attachments. The finite element simulation was used, and the results are well identical with test results. The proposed finite element parameter can simulate the real force on steel-concrete composite hollow sandwich plate.