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首页> 外文会议>IUTAM Symposium on Multiscale Modelling of Damage and Fracture Processes in Composite Materials; 20050523-27; Dolny(PL) >DAMAGE IN PATRIMONIAL MASONRY STRUCTURES The Case of the O-L Cathedral in Tournai (Belgium)
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DAMAGE IN PATRIMONIAL MASONRY STRUCTURES The Case of the O-L Cathedral in Tournai (Belgium)

机译：父系砖石结构的损坏以图尔奈（比利时）的O-L大教堂为例

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摘要

Initiation and propagation of cracks inside a composite material made of bricks and stones bound with a traditional lime mortar remains a very complicated problem, may be just solved today for very simple geometries and loadings with help of theoretical models of behavior and homogenization theory. For real structures under complex loadings, like a patrimonial building, such models are unusable and more crude ones are necessary for preparation of preservation engineering interventions. This paper describes a study aiming mainly to simulate cracks initiation and propagation with resulting damage inside the masonry foundation of the choir of O-L cathedral in Tournai (12th and 13th century, Unesco World Heritage). The analysis is based on a reliable full 3D geometric model taking into account the structure and the masonry foundation settled partly on soft soils and partly on bedrock. All the materials involved in the study are assumed to be linear elastic. Crack initiation is based on a criterion of maximum principal tension stress. Crack propagation is simulated by successive geometric modifications (disconnections between nodal points) inside the model and new analysis. The obtained results allow a satisfactory understanding (much better than the previously obtained with very simplified models) of experimentally observed pathologies and give confidence to the adopted computational method. Based on obtained results a scheme of the actual damaged state of the masonry foundation is proposed. It is quite useful for engineers in charge of structural repairing works.
机译：由砖和石头制成的复合材料与传统的石灰砂浆粘结后，内部裂纹的产生和蔓延仍然是一个非常复杂的问题，如今可以通过行为的理论模型和均质化理论解决非常简单的几何形状和载荷问题。对于复杂负荷下的真实结构（例如，building葬建筑），此类模型不可用，并且对于准备保护工程干预措施，需要使用更原始的模型。本文介绍了一项研究，其主要目的是模拟图尔奈（12世纪和13世纪，联合国教科文组织世界遗产）的O-L大教堂唱诗班的砌筑基础内部的裂纹萌生和扩展，以及由此引起的破坏。该分析基于可靠的完整3D几何模型，其中考虑了结构和砌体基础（部分沉降在软土上，部分沉降在基岩上）。研究中涉及的所有材料均假定为线性弹性。裂纹萌生基于最大主拉应力的标准。通过模型内部的连续几何修改（节点之间的脱节）和新分析来模拟裂纹扩展。获得的结果允许对实验观察到的病理情况有令人满意的理解（比以前用非常简化的模型获得的结果要好得多），并为采用的计算方法增添了信心。根据获得的结果，提出了砌体基础实际损坏状态的方案。对于负责结构维修工作的工程师而言，这非常有用。

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