Dynamic characterization of a heritage construction from 19th century

Abstract Heritage constructions presents high significance and importance for society. As way of contribution for the preservation of the heritage constructions, this paper presents a study on the dynamic behavior of a heritage construction, part of the historic center of Sobral city, located at the north region of Ceará State, namely the Nossa Senhora das Dores Church, a church from the beginning of the 19th century, built in clay brick walls. In this study, ambient vibration tests were performed aiming to obtainment of the natural frequencies of the building focusing the calibration of the numerical model and, from it, proceeding with modal analysis by Finite Element Method (FEM) with recurrence to software Ansys®. The results allowed the analysis of the structural dynamic behavior taking into account natural frequencies, modal shapes and directional displacements.历史遗产建筑对社会具有极高的价值与意义。作为遗产建筑保护的有益探索，本研究针对位于塞阿拉州北部索布拉尔市历史城区的一处遗产建筑展开动力特性研究，该建筑为始建于19世纪初、以黏土砖砌筑的圣多雷斯圣母教堂（Nossa Senhora das Dores Church）。本研究通过环境振动测试获取该建筑的固有频率，用于数值模型的校准；随后借助Ansys®软件，采用有限元法（Finite Element Method, FEM）开展模态分析。所得结果可结合固有频率、振型及各方向位移，对该建筑的结构动力特性进行分析。