Abstract: Most ancient buildings in China are wooden structures, which are vulnerable to fire threat. At present, the experience of fire prevention and control technology for ancient buildings is insufficient, and it is impossible to carry out relevant experimental research using real ancient buildings. In order to solve the above problems, based on BIM and simulation technology, the fire prevention and control technology of ancient buildings is studied through computer simulation. Firstly, BIM is used to build three-dimensional models of four typical ancient buildings, and based on this model, CFD is used to study the natural ventilation and fire smoke spread. The experimental results show that the natural ventilation conditions of the outdoor wind field of ancient buildings with different roof types are significantly different, and the climate conditions also have a great impact on the indoor fire smoke diffusion. The simulation method can be used to simulate the fire smoke spread, and obtain the smoke temperature, velocity, distribution and other parameters, so as to provide reasonable suggestions for the layout of fire-fighting facilities.

Key words:  BIM technology, smoke spread, fire protection and control, numerical simulation