“土-水”环境劣化下古建筑砖土结构破坏孕灾机理研究

The rapid urbanization has a great negative influence on the safety behavior of the ancient buildings, cultural and historical characteristics and regional economies. The macroscopic damages and failures of ancient buildings are obtained through in-situ nondestructive tests. Based on the large-scale model testing, the deterioration mechanism of brick-clay-structures under the conditions of soil-water environment worsen is also gained. The degradation prediction model can be explored though studying the mechanical behavior of brick-clay-structures under the conditions of the cycle of freezing and thawing, drying and watering, ground or fissure movements, and then the damage grades of ancient buildings and mesoscopic damage assessment methods are established. In the end, the 3D dynamic system of geological information and healthy state warning system are obtained. Based on the above research topics, the research findings can provide a basis theoretical support for the disaster evaluation, prevention and reduction of ancient buildings.

城市化的建设对在役古建筑的安全性态、历史文化风貌及区域经济将产生巨大的负面影响。本项目拟通过现场无损探测试验深入分析古建筑的宏观损伤特性及其破坏诱因；再基于室内大型相似模型载荷试验，研究古建筑砖土结构在“土-水”环境的劣化条件下的劣化规律，探索其在冻融循环、干湿循环和临近开挖地层移动、地裂缝错动等作用下的力学行为和劣化损伤预测模型，建立古建筑的破坏等级及其细观损伤评估方法；最终构建古建筑结构的三维动态地质信息和健康状态预警系统。本项目旨在系统深入研究砖土古建筑结构劣化规律及其预测模型的基础上，重点解决“水-土”环境劣化作用下砖土结构破坏的孕灾机制、安全评估和预警等科学问题。为古建筑的灾害评估、防灾减灾提供基础理论支撑。

城市化的建设对在役古建筑的安全性态、历史文化风貌及区域经济将产生巨大的负面影响。本项目拟通过现场无损探测试验深入分析古建筑的宏观损伤特性及其破坏诱因，再基于相似模型试验和室内试验，研究古建筑砖土结构在“土-水”环境的劣化条件下的劣化规律，探索砖-土材料在自然环境作用下的力学行为和劣化损伤特征，建立古建筑的破坏等级评估方法，并提出相应的修复技术，为古建筑的灾害评估、防灾减灾提供基础理论支撑。