Research On Stress Performance And Damage Model Of Frame-supported Multi-ribbed Composite Panel Structure

Frame-supported multi-ribbed composite panel structure is a new structural system which is composed by the multi-ribbed composite panel. The multi-ribbed composite panel is energy saving and environmental protection, and furthermore, performs well in the earthquake. So far, the multi-ribbed composite panel has been studied well and widely used in engineering. What’s more, Technical Specification for Multi-ribbed Composite Panel Structures (JGJ/T275-2013) has been implemented in June1,2014. But, for the frame-supported multi-ribbed composite panel structure, much more studies on the stress performance, especially the stress performance in the plastic stage, and the cumulative damage are required. In this paper, I studied the stress performance, some influencing factors of the stress performance and the damage model of the frame-supported multi-ribbed composite panel structure through cyclic loading test and finite element analysis. What’s more, this paper also provides some support for the development of the basic theory and engineering design.The main content is as follows:(1) The damaging process and the failure mode are analyzed based on the results of the test. And the bearing capacity, hysteretic behavior, skeleton curve, stiffness, deformation, ductility and energy dissipation ability are all discussed.(2) The finite element model was established and the cyclic load was applied by the finite element software-OpenSees. And then some nonlinear analysis was done by OpenSees. Compared the calculation results with the test results, the model and the constitutive parameters of the materials can be find reasonable.(3) Some factors, such as the strength of concrete, the strength of steel bars and the height of the first floor, were changed in the model to find the influences of these factors on the frame-supported multi-ribbed composite panel structure by finite element analysis. The frame in the first floor was added shear walls whose widths were changing or the second floor was opened different holes to get a series of models with continuous transfer-floor stiffness ratios. And then the effect of the transfer-floor stiffness ratio on the frame-supported multi-ribbed composite panel structure can be studied by the finite element analysis. Finally, the reasonable value of the transfer-floor stiffness ratio for the frame-supported multi-ribbed composite panel structure can be get by the study of the infinite element analysis results. (4) The calculation formula of damage evaluation index was established according the existing damage models and the finite element analysis results. The damage evaluation law was summarized through the finite element analysis and verified by the test results. At last, the repair suggestion based on the damage evaluation index was given.