| The warehouses of most petrochemical enterprise are large span and large space architectures, therefore truss structures are often used. Steel structure has many advantages, such as light weight, high strength, good anti-seismic and convenient construction, but the refractory nature of steel is poor. Under the fire, the bearing capacity would reduced drastically when the temperature reach 500℃, which would cause the failure of the structure and massive casualties and property losses. Most of the warehouse of petrochemical enterprise is large area, so generally it is difficult to meet the code requirement about the fire zone. At present, the design department uses the old design method to design the fire protection of the warehouses of petrochemical enterprise, and it is hard to achieve the design goal. Therefore, Performance-based fire protection design is becoming more and more popular in these days.The affecting factors of the polymer's heat release rate were researched in this paper, and Performance-based fire protection design has been used in the polymer warehouse of Liaoning Huajin Group. The main content of the thesis is listed as follow:1. The conception, the basic contents and the essential stages of the Performance-based fire protection design are introduced. The key points of Performance-based fire protection design are summarized.2. The Fire Dynamics Simulator (FDS) and the modeling software PYROSIM which is used the FDS modeling are introduced.3. The affecting factors of the polymer's heat release rate, which include the position of the aperture, aperture ratio and spray system, are analyzed.4. The fire scenarios in the polymer warehouse have been established. Reasonable space between the polymer piles has been achieved through the simulation of FDS and compared with the results of theoretical equation.5. Smoke movement processes of different fire scenarios are simulated with FDS, and we get the heating-up curve, heat release curve and the distribution of visibility.
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