Methodology for diagnosing crack patterns in masonry structures using photogrammetry and distinct element modeling
Methodology for diagnosing crack patterns in masonry structures using photogrammetry and distinct element modeling
复制标题
使用摄影测量和不同元素建模诊断砌体结构裂缝模式的方法
DOI：
10.1016/j.engstruct.2018.12.036
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发表时间：
2019
影响因子：
5.5
通讯作者：
B. Glišić
中科院分区：
文献类型：
--
作者：
R. Napolitano;B. Glišić
了解现有结构损坏的原因可以加强保护、翻新和修复工作。这项工作的目的是概述一种使用摄影测量和不同元素建模(DEM)相结合的方法来诊断现有结构裂缝的最可能原因。建造了五面试验用的砖墙，并对其进行了开裂；用摄影测量法记录了墙体开裂前后的状态。使用不同的单元模型，每个试验墙都受到不同的荷载条件，包括在试验测试期间用于开裂墙的相同荷载工况。用定性和定量相结合的方法将模拟中的裂纹模式与实验的裂纹模式进行了比较。最能反映现有损伤模式的模拟被选为最有可能造成损伤的原因。对于每一面测试墙，真实的模拟载荷与摄影测量捕捉到的现有损伤模式具有最接近的分数距离。这种方法随后被应用于诊断意大利佛罗伦萨圣乔瓦尼浸礼会基础墙裂缝的可能原因。
Understanding the causes of damages on existing structures can augment preservation, renovation, and rehabilitation efforts. The aim of this work is to outline a method for diagnosing the most probable causes of cracks on existing structures using a combination of photogrammetry and distinct element modeling (DEM). Five experimental, masonry walls were constructed and cracked; the state of the wall before and after cracking was recorded using photogrammetry. Using distinct element modeling, each test wall was subjected to a variety of loading conditions including the same load case which was used to crack the wall during experimental testing. The crack patterns in the simulations were compared to the experimental crack patterns using a combined qualitative and quantitative method. The simulation which most closely reflected the existing damage patterns was selected as the most probable cause of the damages. For each of the test walls, the real simulated load had the closest fractional distance to the existing damage patterns captured by photogrammetry. This method was then applied to diagnose possible causes of cracking on a foundation wall in the Baptistery of San Giovani in Florence, Italy.