木结构古建筑震后破坏状态评估方法研究

Research on Evaluation Methods for Post-earthquake Damage State of Ancient Wooden Buildings

木结构古建筑震后破坏状态评估涉及众多影响因子,且各因子间还存在相关性和不确定性.为提高木结构古建筑震后破坏状态评估的准确性,本文提出了基于模糊数学理论的评估方法.首先,将木结构古建筑分为地基、基础、上部结构3个部分,结合其震害特点,选取13个指标作为评估因子;然后,由层次分析法确定权系数向量,采用隶属函数和类比法构造评判矩阵,建立三层次两阶段的模糊综合评估模型;最后,以青城山黄帝殿为例,应用该模型对其在汶川地震后的破坏状态进行了评估.结果表明,本文方法能合理、较准确地评估震后木结构古建筑的破坏状态,可为木结构古建筑震后维修措施提供依据.

Post-earthquake damage state evaluation of ancient wooden buildings involves many impact factors and there are correlations and uncertainty among these factors. In order to improve the damage state assessment accuracy of post-earthquake ancient wooden buildings, fuzzy mathematics theory was employed to investigate this issue. Firstly, ancient wooden buildings were decomposed into three parts., subsoil, foundation and superstructure, and 13 indicators were selected for the evaluation factors based on their damage characteristics. Then, the weight coefficient vector was determined by hierarchy analytical process and the iudgment matrix was constructed using membership function and analogy method. Twophase three-level fuzzy comprehensive evaluation model was built. Finally, taking the Emperor Temple in Qingcheng mountain as an example, the developed model was applied to evaluate its damage state after Wenchuan earthquake. The results show that the evaluation method can reasonably and accurately assess the post-earthquake damage state of ancient wooden buildings, which can provide references to the postearthquake repair measures of these buildings.