Tunnel structure fire test system and method based on real-time fusion of data and object spaces

Abstract

The invention provides a tunnel structure fire test system and method based on real-time fusion of data and object spaces, and the system comprises a physical test unit which is used for carrying outthe holographic fire test of a plurality of typical components in a tunnel structure system in a physical space, so as to obtain the holographic feature parameter data of the components; a numerical analysis unit which is used for establishing a full-scale tunnel structure system numerical model in a numerical space so as to obtain multi-field coupling boundary data of the typical component; and afusion control unit which is used for controlling and adjusting the multi-field coupling boundary of the physical space according to the multi-field coupling boundary data and updating and adjustingthe input parameters of the numerical space according to the holographic characteristic parameter data. Holographic information acquisition of real high-temperature mechanical properties in the wholesystem and the whole fire process of the large tunnel structure is realized through data and object co-fusion and real-time interaction.

Description

technical field [0001] The invention relates to the technical field of tunnels and underground construction engineering, in particular to a tunnel structure fire test system and method with real-time integration of digital and physical space. Background technique [0002] Fire is a major threat affecting the safe operation of tunnels. Due to the closed space environment, tunnel fires have the characteristics of rapid heating rate, long duration and uneven temperature distribution, which lead to a large amount of heat transfer to the tunnel lining structure and surrounding strata during the fire, forming an unsteady temperature field with a large temperature difference. , which leads to the gradual development and accumulation of uneven thermal stress and deformation, which eventually leads to concrete bursting, peeling of protective layer, failure of steel bar exposure, and deterioration of lining mechanical properties, which significantly reduces the bearing capacity and re...

AI Technical Summary

Problems solved by technology

However, the existing problems and deficiencies in the current research on thermal-mechanical coupling of large and complex tunnel structures under complex geological conditions are mainly reflected in: (1) The current experimental research and methods cannot consider the fire characteristics of the tunnel structure-ground as a composite system; (2) For the non-uniform and unsteady high-temperature action of fire and the coupling action of temperature-stress in the whole process, there are many limitations in a single numerical simulation, especially for the simulation of key issues such as the mutual contact between structures and soils, and structural details. In addition, under the background of new materials, new structural forms, new fire scenes, etc., due to the lack of background data and accumulation, coupled with its own complex behavior, the numerical simulation method obviously cannot accurately reflect the real impact of the structure. (3) It is difficult to reflect the real fire response of underground structures under complex geological conditions through scaled model tests

[0005] Based on the above analysis, the tunnel structure is rapidly developing in the direction of longer, larger, and deeper, and the equipment capacity cannot meet the growing demand for full-scale tests. There is a huge gap between the available research methods and the needs, and it is urgent to develop new ones. way to solve

Images