基于灰色模糊分析法的古建筑木结构安全性评估

Safety Assessment of Ancient Timber Buildings Based on Gray-fuzzy Analytical Method

为了利用有限检测结果对古建筑木结构进行安全性评估,基于灰色系统理论和模糊数学,提出古建筑木结构灰色模糊安全性评估方法.梳理古建筑木结构鉴定单元、子单元和构件的划分原则和安全等级的划分原则.研究并建议属性灰色模糊关系矩阵的确定原则和属性权重向量的确定方法.利用该方法对某典型民用古建筑木结构的安全性进行评估.研究结果表明:利用灰色模糊分析法对古建筑木结构进行安全性评估简单可行.与传统的评级法相比,该方法可考虑不同构件对结构安全性的贡献程度以及不同属性对同一构件安全性的贡献程度.

In order to assess the safety grade of the ancient timber buildings by limited testing results, a gray-fuzzy analytical method of safety assessment of ancient timber buildings was proposed based on gray system theory and fuzzy mathematics. The classification principles of the members, sub-systems and appraisal systems of ancient timber buildings and their safety grades were studied and reviewed. The determination principles of the properties gray-fuzzy relation matrixes and the weight vectors were recommended. A typical ancient timber building for civil use was exemplified to apply the proposed method to assess its safety grade. It shows that gray-fuzzy analytical method is uncomplicated and practicable to assess the safety grade of ancient timber buildings. Compared with the traditional grade assessment method, the proposed method takes consideration of the diverse contribution of different members to building safety and the different contribution of a member' s each property to its safety grade.