Partially Filled Steel Box-Concrete Eccentric Compression Member Force Performance Analysis

Steel box-concrete composite structure is a new kind of composite structure, it is developed in the practical engineering, and it has a strong bearing capacity, good fire resistance and excellent seismic performance, light weight, and the advantages of convenient construction, thus is widely used in the long-span bridge, city overpass and high-rise building in practical engineering, and therefore achieved good social and economic benefits. Partly filled steel box- concrete composite structures is mainly populated part of concrete in the steel box, the other one is empty steel box,characterized by a combination of cross section of a flexible, and can reduce the weight of the structure in great quantities. This paper studied the partly filled steel box- concrete composite member mainly aims at the main arch ring of arch bridge mechanical characteristics, proposed the combination form of diversification, so it can be designed according to different section of the bridge, at it also took into account the arch bridge main arch ring in construction in the process of fast speed and safety.In this paper, it used the method of combining theoretical analysis and experimental research, and it has studied partly filled steel box concrete eccentric compression member of mechanical performance under different parameters, the main research content has the following several aspects:First, by using the finite element software ABAQUS to fill column for simulation analysis of steel box- concrete components and main parameters of concrete filling rate here and slenderness ratio, eccentricity in certain cases, the filling rate of the column were changed and slenderness ratio, it is concluded that under different fill rates and loading process of the component under different slenderness ratio, leads to fill rates and slenderness ratio on the bearing capacity of components.Second, based on the results of theoretical analysis and parameter, select a representative parameters to test and research, by analyzing the experiment phenomenon and the test result, and the test results using ABAQUS and the second chapter compares and analyses the results of our model in order to validate the finite element model used in the constitutive relation, contact Settings, such as meshing precision components under the condition of analog simulation, we determine the correctness of the theoretical analysis.Last, According to theoretical analysis and test research results, combined with theother part of the research results, through the example data regression analysis, the partly filled steel box- concrete simplified calculation formula of bearing capacity of eccentric compression member. With the different parameter calculation formula, the results with experimental results and theoretical analysis results, this paper compares and analyzes to verify the feasibility and effectiveness of the method to calculate.