基于突变级数法的某古建筑火灾危险性等级评价

Study on Fire Hazard Grade of an Ancient Building Based on Catastrophe Progression Method

为更好地对古建筑火灾危险性等级进行研究,提出一种将突变理论与改进的中心点三角白化权函数相结合的古建筑火灾危险性等级评价方法。该评价方法从火灾危险源、安全管理、建筑因素和消防应急设施四个方面建立古建筑火灾危险性等级评价指标体系,应用改进的中心点三角白化权函数建立隶属函数公式计算各指标隶属度,并根据突变模型的归一化方程建立模糊隶属函数矩阵,将计算出的数值规划为一个数据为古建筑火灾危险性等级的总突变隶属函数值。通过将该评价方法应用于某古建筑火灾危险性等级评价,结果表明:该古建筑火灾危险性5个等级下的最大总突变隶属函数值为第二级的0.935,故该古建筑火灾危险性等级为Ⅱ级,属于轻度危险,该评价结果与现场实际调查情况一致,证明了该评价方法的有效性。根据评价结果提出相关措施,对预防古建筑火灾具有重要意义。

In order to better study the fire risk level of ancient buildings,a method combining the mutation theory with the improved central point triangle whitening weight function is proposed.The evaluation method establishes the evaluation index system for fire risk grade of an ancient building from four aspects:fire hazard source,safety management,building factors and fire emergency facilities.The membership function formula is established to calculate the membership degree of each index by using the improved central point triangle whitening weight function,and the fuzzy membership function matrix is established according to the normalization equation of the mutation model.The calculated value is planned as a total mutation membership function whose data is the fire risk level of the ancient building.The evaluation results show that the maximum total mutation membership function value under the five levels for this ancient building is 0.935 of the second level.Therefore,the fire risk level of the ancient building is level H,a mild danger,which is consistent with the actual situation on site,proving the effectiveness of the evaluation method.It is of great significance to put forward relevant measures on the basis of the evaluation resuIts to prevent fire in ancient buildings.