In view of the fire problems left in dense historical settlements in China, such as fire hazards that are prone to fires, difficulties in fighting fires, and the incomplete applicability of current fire codes due to the high historical value of buildings, this paper proposes a scientific and systematic performance-based fire protection method that gives priority to value preservation. This method is applied to dense historical settlements, and the effectiveness of this method is verified by evaluating the results of fire protection planning and renovation through multiple rounds of computer numerical simulation. The results show that in a connected cluster of buildings, one of the fire retrofitting requirements in the horizontal or vertical direction needs to be met between two adjacent buildings to ensure that the fire does not spread, and the retrofitting direction has to be selected based on the value and risk assessment results. When dense historical clusters are renovated for fire prevention planning, the optimal renovation path to meet fire safety can be effectively selected based on the method proposed in this paper.

针对我国历史遗迹密集遗留的火灾隐患易燃、灭火难度大、建筑物历史价值高导致现行消防规范适用性不完全等问题，提出了以保值为先的科学、系统的性能化消防方法。将该方法应用于密集历史聚落，通过多轮计算机数值模拟评估消防规划改造结果，验证了该方法的有效性。结果表明，在一个相连的建筑群中，相邻两栋建筑之间需要满足水平方向或垂直方向的防火改造要求之一，才能保证火势不蔓延，并根据价值和风险评估结果选择改造方向。在对密集历史建筑群进行消防规划改造时，基于本文提出的方法可以有效地选择满足消防安全的最优改造路径。