Structural Selection of Large-Scale Landscape-Style Independent Column Billboards ( Part 1 )

In order to adapt to the rapid development of the city and solve the problem of disorderly outdoor advertising, it is necessary to standardize the setting of outdoor advertising and guide the healthy and orderly development of the outdoor advertising industry. How to improve the quality of urban outdoor billboards has become an urgent task. Improving the quality of outdoor billboards can make them compatible with urban development planning, ecological livability, charming culture, and economic development, and promote the long-term, sustainable and coordinated development of outdoor billboards and cities. With the acceleration of my country’s urbanization process, advertising facilities such as large-scale landscape-style independent column billboards with different characteristics are built at important nodes such as airports, expressway entrances and exits, and city squares, which will beautify the city square and main road space and enhance the city. Views, character and taste play a vital role. Compared with conventional three-sided or two-sided steel structure independent column billboards, large-scale landscape-type independent column billboards have the distinctive characteristics of unique and beautiful shape, rich cultural color, small footprint, high space utilization rate, and good advertising visual effects. On the premise of meeting the requirements of advertising functions, large-scale landscape or independent column billboards must ensure that the structure is safe and reliable and meet a certain service life. The appearance of billboards should be beautiful and generous, reflecting local cultural characteristics, and should be in harmony with the appearance of the city and the surrounding environment. Therefore, it is very important to analyze the structural design and selection of large-scale landscape independent column billboards.

1、Structural characteristics of large-scale landscape independent column billboards

The structure of a large-scale landscape-style independent column billboard is generally divided into two parts: the super structure and the foundation. Usually, the super structure of the billboard has a small weight, but due to the large area and high position of the billboard panel, the surrounding area is open. Under the action of horizontal wind load, it has the characteristics of large internal force at the foot of the column and large lateral displacement at the top of the column. Therefore, the upper structural columns, beams and panels of large-scale landscape-style independent column billboards should preferably choose steel structures with good deformation performance; while the foundation foundation should be selected according to the engineering geological conditions of the site, and the foundation bearing capacity, foundation deformation and overall stability should meet the requirements. reinforced concrete foundation form. In addition, due to the large internal force values such as bending moment and shear force at the foot of the steel column, the design and construction of the connection node between the foot of the steel column and the foundation has also become a key link to ensure the safety of the structure.

2、Large-scale landscape-style independent column billboard super structure selection

According to “Outdoor Steel Structure Independent Column Billboard” and “Outdoor Advertising Facilities Steel Structure Technical Regulations” (CECS148: 2003), the outdoor floor-standing steel structure independent column billboard consists of four construction methods, superstructure, auxiliary facilities, and reinforced concrete foundation. Partial composition. The billboard panel can have two or three sides, and it can also be designed into a cylindrical shape or other unique shapes according to the artistic effect of the billboard. The independent columns are generally steel pipe columns or steel pipe concrete columns, and the rest of the upper main structure can be rigidly connected with steel pipe beams and steel supports bearing panel loads to form a plane or space frame structure (Figure 1), and light and novel spaces such as space frame structures can also be used system. space frame structure (Figure 2) refers to a flat or micro-curved space bar system structure formed by connecting bars arranged according to certain rules through nodes. The space frame structure billboard has a novel shape, and can adapt to the diversity of shapes selected for artistic effects. The space frame structure mainly bears the overall bending stress, and the horizontal torque can be reduced through the reasonable arrangement of structural components. It has large space rigidity, good overall stability, simple force transmission path, and flexible plane layout, which is conducive to the layout and installation of auxiliary facilities , space frame members and nodes are convenient for industrialized and standardized production.

Figure 1 frame structure billboard

Figure 2 space frame structure billboard