The superiority of Chengdu steel structure is reflected in where

Chengdu steel structure usually in the temperature of 450 ~ 650 °C will lose the bearing capacity, large deformation, resulting in steel columns, steel beams bending, as a result of excessive deformation can not continue to use, generally unprotected Chengdu steel structure fire resistance limit of about 15 minutes. The length of this time is also related to the speed at which the component absorbs heat. High-rise steel structure buildings are increasing, especially some super high-rise buildings, and the use of steel structure materials is more extensive. , steel is a building material that does not burn, it has characteristics such as earthquake resistance, bending resistance, etc. In practical applications, steel can not only relatively increase the load capacity of buildings, but also meet the needs of architectural design aesthetic modeling; It also avoids defects such as concrete that cannot be bent and stretched. Therefore, steel is favored by the construction industry, single-storey, multi-storey, skyscrapers, factories, warehouses, waiting rooms, waiting halls, etc. are very common. Once a fire accident occurs in a high-rise building, the fire can not be extinguished in a short time, which requires us to increase the fire protection of building materials in building design to enhance its fire resistance limit, and develop necessary emergency plans inside the building to reduce casualties and property losses. In view of the problems of separating the continuity of construction and the interaction between various parts of the construction system in the simulation and calculation of the construction process in the past, we established an integrated collaborative time-varying analysis system and calculation theory for the construction process of complex steel structure. Sichuan steel structure integrates the existing technologies such as life and death units and the state nonlinear solution technology created by the research group, the cable pulley adaptive algorithm, the jack-contact unit, the point-by-point constraint form-finding method and other new technologies, integrating the gradual installation of permanent components in the construction process, the assembly and dismantling of temporary supports, the appearance and disappearance of temporary construction loads, the role of temperature and wind loads, etc., the steel structure can truly reflect the structural installation, boundary conditions, load action and time-varying properties of materials; He is especially good at accurately analyzing the evolution of the construction system in time and space, accurately calculating the interaction between various parts of the construction system, and accurately grasping the continuous change and nonlinear accumulation process of the internal force and shape of the structure during the construction and molding process.