Study On Dynamic Elastoplastic Response Of Multi-ribbed Slab Structure

As a new system of structure,Multi-Ribbed Composite Slab Structure is characterized by excellent mechanical and resisting earthquake force capacity,in order to complete the theoretical system and generalize the applications of those structures, it is critical to construct the reasonable force analysis model. In this thesis,the dynamic elasto-plastic response of multi-ribbed slab structure is analyzed by constructing an analytical FEM model proposed, according to the load bearing mechanism, the constitutive relation of concrete of different of the multi-ribbed wall panel material and the former study on the seismic performance of multi-ribbed wall panel.First, from the former study, this paper analyses the multi-ribbed wall panel's mechanical characteristics and mechanical performance of the air entrained concrete blocks. Based on the rigid frame-oblique compression bar model and constitutive relation of concrete,the compression-only bar element is introduced to establish a rigid frame-cross oblique compression bar FEM structural model with regard to influence of seismic response.Secondly, A modal analysis of the rigid frame-cross oblique compression bar FEM structural model is performed by the use of FEM software ANSYS. The result of modal analysis is compared with the test result and the result calculated by equivalent frame structure model analysis to test its reasonalility.Finally, this paper compares earthquake responses between cross-braces model and frame structure model by using dynamic elastoplastic time history analysis. The analytical results shows that the seismic performance and the mechanical behavior of the multi-ribbed slab structure is improved compared with the frame structure.