Mechanical Property Study And Practical Oblique Section Design Method Study On Multi-ribbed Composite Wall

Since the reform and opening, residence construction has been speedily developed. Multi-ribbed Slab Structure, as a new structural system, is very potential. Previous study is much fruitful. However, there is still a lot to be advanced. The paper, based on test and other available material, mainly studied on mechanical property and oblique section bearing capacity of the composite slab.1. Based on tests of nine 1/2-scaled model slabs under vertical loads, the paper analyzed load-deformation curve and proposed limit value of height-width ratio under axial loads.2. Based on aseismic tests, the paper put forward a model of concrete frame, silica brick and a combination of the two, proposed that the silica brick works as a 45 compression bar, analyzed the factors which may influence bearing capacity of the slab and advised a formula including the numbers of bays and of storeys of the frame.3. Through test of 1/4-scaled two-storeyed model, the failure mode of multi-ribbed slab in high-rising building was simulated. The paper analyzed the slab's mechanical performance and normal section bearing capacity. The analysis showed the strain of section is not plain under moment so that the moment is carried by force couple in the outer frame.4. The paper gave the rigid frame-compression bar model for practical computation. By means of linear FEM analysis, the paper discussed optimal design of the slab.