1 Seismic site investigation and structural amplification based on geotechnical and structural health monitoring
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Julijana Bojadjieva
Abstract
The Ohrid region being one of the most beautiful regions in North Macedonia is also earthquake-prone and a couple of strong earthquakes in the past have caused great disasters. The strongest recorded earthquake was reported in February 1911, with a magnitude of 6.7 at a depth of 15 km. In view of the high seismicity of the Ohrid region, almost all buildings are exposed to risk of a potential earthquake event. The demand for detailed inspections has been initiated in the 80s of the previous century, which has been a pioneering event in the Balkan regions. One of the sites is the Location Tower, which has been reestablished recently and enables real-time monitoring and recording of data. The Location Tower consists of a surface and three downhole instruments up to 125 meters down the bedrock; it is a nine-story building with two instruments installed on the 6th and 9th stories and four instruments installed at the foundation level. Several small to moderate earthquakes have been recorded during the period 2021-2022. Selected results and comparisons of equivalent analysis are presented in this work using real recorded acceleration data from the analyzed site. Based on a number of geophysical and geotechnical investigations, the soil profile of the location is obtained and evaluated both in situ and by laboratory tests. The obtained results present a promising starting point for further complex site response analysis considering both linearity and nonlinearity of the material models, which can be validated by stronger earthquakes in future.
Abstract
The Ohrid region being one of the most beautiful regions in North Macedonia is also earthquake-prone and a couple of strong earthquakes in the past have caused great disasters. The strongest recorded earthquake was reported in February 1911, with a magnitude of 6.7 at a depth of 15 km. In view of the high seismicity of the Ohrid region, almost all buildings are exposed to risk of a potential earthquake event. The demand for detailed inspections has been initiated in the 80s of the previous century, which has been a pioneering event in the Balkan regions. One of the sites is the Location Tower, which has been reestablished recently and enables real-time monitoring and recording of data. The Location Tower consists of a surface and three downhole instruments up to 125 meters down the bedrock; it is a nine-story building with two instruments installed on the 6th and 9th stories and four instruments installed at the foundation level. Several small to moderate earthquakes have been recorded during the period 2021-2022. Selected results and comparisons of equivalent analysis are presented in this work using real recorded acceleration data from the analyzed site. Based on a number of geophysical and geotechnical investigations, the soil profile of the location is obtained and evaluated both in situ and by laboratory tests. The obtained results present a promising starting point for further complex site response analysis considering both linearity and nonlinearity of the material models, which can be validated by stronger earthquakes in future.
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Editors’ short biography IX
- 1 Seismic site investigation and structural amplification based on geotechnical and structural health monitoring 1
- 2 Impact of industry 4.0 technologies on structural health monitoring 29
- 3 Health monitoring of recycled aggregates-reinforced concrete beams retrofitted by concrete jacket using piezoelectric transducers 63
- 4 Identification of critical response of bilinear-hysteretic SDOF model with tuned inertial mass damper under long-duration ground motion through internal simulation monitoring 79
- 5 Damage identification using physics-based datasets: From convolutional to metric-informed damage-sensitive feature extractors 101
- 6 Structural health monitoring of steel plates using modified modal strain energy indicator and optimization algorithms 125
- 7 Vibration-based damage detection using a novel hybrid CNN-SVM approach 137
- 8 Fast probabilistic damage detection using inverse surrogate models 159
- 9 Remote sensing techniques for post-disaster infrastructure health monitoring 197
- 10 Recent developments in the building information modeling-based programs used for structural and architectural purposes 215
- 11 Evaluating the current state of digitalisation of the UK construction industry 237
- Index 259
Chapters in this book
- Frontmatter I
- Preface V
- Contents VII
- Editors’ short biography IX
- 1 Seismic site investigation and structural amplification based on geotechnical and structural health monitoring 1
- 2 Impact of industry 4.0 technologies on structural health monitoring 29
- 3 Health monitoring of recycled aggregates-reinforced concrete beams retrofitted by concrete jacket using piezoelectric transducers 63
- 4 Identification of critical response of bilinear-hysteretic SDOF model with tuned inertial mass damper under long-duration ground motion through internal simulation monitoring 79
- 5 Damage identification using physics-based datasets: From convolutional to metric-informed damage-sensitive feature extractors 101
- 6 Structural health monitoring of steel plates using modified modal strain energy indicator and optimization algorithms 125
- 7 Vibration-based damage detection using a novel hybrid CNN-SVM approach 137
- 8 Fast probabilistic damage detection using inverse surrogate models 159
- 9 Remote sensing techniques for post-disaster infrastructure health monitoring 197
- 10 Recent developments in the building information modeling-based programs used for structural and architectural purposes 215
- 11 Evaluating the current state of digitalisation of the UK construction industry 237
- Index 259
