Impact of Groundwater Level Change on Natural Frequencies of RC Buildings

Structural health monitoring (SHM) provides an opportunity to assess and predict changes in the technical condition of structures during operation a building. damage, as well several operational environmental conditions, causes modal parameters. Temperature is most popular which used for research. However, authors’ knowledge, this first investigation that highlights effect groundwater level change on natural frequencies buildings impact possible damage detection features. Groundwater can influence structural measurements cause faulty identification using vibration-based methods. This paper aims analyse parameters mid-rise reinforced concrete buildings. The are determined finite element (FE) models. Three different FE models system types nine-storey (RC) with shallow foundations determine fluctuation values buildings’ frequencies. Changes have research proposes new has be considered identify method. It found rise decrease frequency value. In research, it established abruptly, there non-linear correlation between under varying conditions case damage. To long-term measurements, recommended select features sensitive but not affected by change. Data normalisation elimination linear methods short-term SHM seasonal