Optimization Of Railway Passenger Station Structure Based On Concept Analysis

Along with the constantly development of railway industry, new passenger railway station is growing in number increasingly and adds to a growing amount of research of study of the structrue of canopy. Passenger railway station structure is a great system, and it is difficult to realize the whole optimization. According to the structure characteristics we can classify it into several relatively independent segments, and realize the block-optimization. From the perspective of structure, railway station structure can be divided into the upright, floor, roof, canopy and rail layer. Based on the passenger railway station floor and the canopy structure, this paper uses the method of concept analysis to find the relationship between the structure design parameters and the engineering material consumption. And then we can realize the structure optimization.During the station floor structure optimization, based on the target of optimize the unit engineering amount, we select design parameter as main variables,such as structure types, the basic column grid and design load, we use the conceptual analysis methods to carry out the floor structure optimization, and obtain the rational structure form and the range of unit engineering amount under different conditions. The results show that each span all match to the most suitable structure forms, and each structure form also match to the right span.During the station canopy structure optimization, based on the target of optimize the minimum amount of structure steel, we select design parameter as main variables,such as the fundamental wind pressure,the structure types, and the seismic intensity of the basic column grid, we use the conceptual analysis methods to carry out the canopy structure optimization, and obtain the rational structure form and the range of unit engineering amount under different conditions. The results show that the bilateral overhung canopy structure is more economic than unilateral overhung canopy structure, real abdomen steel beam structure applies to all bilateral overhung canopy structure, the suitable structure of the unilateral overhung canopy structure may be according to its span, the load and bars.With the wide range application of the high-strength lightweight materials and the emerging of new type of structure forms, the span of station structure is becoming more and more large, and the quality becomes continuously light, the structure fundamental frequency come out lower and lower. A lot of structure fundamental frequency is already in people’s normal activities range, so that it is easy to cause resonance. When using different forms of structure, we need according the section data from the optimize analysis to analysis the self-vibration characteristics of those representative station and the incentive analysis of those large station under jumping load (impact load).