Assessment of structural damage detection methods for steel structures using full-scale experimental data and nonlinear analysis

Abstract

Rapid structural damage assessment methodologies are essential to properly allocate emergency response and 8 minimize business interruption due to downtime in the aftermath of earthquakes. Within this context, data-driven 9 algorithms supported by sensing capabilities can be potentially employed. In this paper, we evaluate an extensive 10 number of damage indicators computed based on nonmodel-based system identification techniques and wavelet 11analysis. The efficiency of these indicators to infer the damage state of conventional steel moment-resisting frames 12 (MRFs) and concentrically braced frames (CBFs) is evaluated through the utilization of landmark full-scale shake

Earthquake Early Warning and Rapid Response System Based on Smart Seismic and Monitoring Sensors Embedded in a Communication Platform and Coupled With Bim Models

“…This may last weeks or months, accompanied with an important economic cost due to shut down. Modern structural health systems can provide real time damage detection based on changes in dynamic properties of the monitored structures [16]. There is a variety of methods both in time and frequency domain such as autoregressive methods, stochastic subspace identification, frequency domain decomposition method, which can assess the seismic performance and health condition through different indicators [17].…”

“…Moreover, the existence of a geotechnical seismic sensor close to the monitored facilities, allows the application of either output only or input/output methods [18]. For different structural types, different types of damage indicators may be more effective [16]. The functionality of the measurement chain, selected damage indicators and assessment methods will be verified in scaled benchmark structures and substructures in laboratory in advance.…”

Proposed Methodology for Earthquake-Induced Loss Assessment of Instrumented Steel Frame Buildings: Building-Specific and City-Scale Approaches

“…Noh et al [18] introduced the wavelet-based DSFs as structural damage indicators, which are defined by the ratio of the wavelet energy at the first-mode natural frequency of the building over time to the total wavelet energy. Hwang and Lignos [22] suggested that this wavelet-based DSF should be adjusted in cases that higher mode contributions become considerable. In this case:…”

“…Hwang and Lignos [22] conducted further validations on the potential use of wavelet-based DSFs for structural damage identifications based on full-scale shake table experiments on steel frame buildings with steel MRFs [24,25] and concentrically braced frames [26,27]. They found that the mapping of a DSF value to a story-based EDP is possible.…”

Damage detection of steel moment frames under earthquake excitation

“…Hwang and Lignos 56 have numerically and experimentally identified the damage of a steel moment-resisting structure and a concentrically braced frame structure under sequence-based earthquakes. It was found that increasing earthquake intensities and structural damages result in decreasing the structural frequency.…”