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Performance indicators such as energy, stiffness and displacement are the key parameters to evaluate the damage degree of structures or members subjected to earthquake. Establishing accurate and effective damage models based on these parameters is very necessary for performance-based seismic design. The current damage models have some deficiencies...
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Nonlinear response history analysis (NLRHA) is considered the most accurate procedure for evaluating the seismic performance of high-rise buildings. However, it requires considerable expertise and a significant amount of analysis time, making it inappropriate for evaluating numerous high-rise buildings; for example, estimating the seismic losses of...
Citations
... The proposed damage index was then used to determine the damage level of different structural systems with different ductility capacities using their equivalent SDOF systems (Rodriguez 2018). He et al. (2022) proposed a damage model based on the differential ratio of elastic-plastic dissipated energy by determining the difference between the ideal elastic -plastic deformation energy and the actual elastic -plastic deformation energy. The damage state limits were calibrated based on the story drift ratio ranges, and the proposed model was experimentally verified for concrete structures under static and seismic loads. ...
A new scenario-based method is proposed to determine the performance range of structural systems. The advantage of this method is using inter-storey drift as a damage index, while exploiting local damage indices of the main structural members without the need for detailed analytical models and computationally expensive non-linear dynamic analyses. A new damage function is proposed by linking the local (plastic hinge rotations) and global (inter-storey drifts) damage levels. The accuracy of the proposed function is evaluated and compared with the indices in ASCE41-06, ATC-13, and HAZUS for a set of steel moment-resisting frames subjected to earthquakes of varying intensities.
... They developed far-and near-field structural vulnerability functions under the influence of model uncertainty by using sensitivity analysis theory. Energy and probability parameters were applied to structural seismic loss and damage assessment by He et al. (2022) and Li and Cai (2022). Different energy levels and vector intensity measures were considered. ...
To comprehend the empirical seismic vulnerability capability of various typical structures in towns and suburbs, this study considers, as the research background, the structural damage data observation from the Mw 7.1 Yushu earthquake that occurred on 2010 April 14th in China. The proposed research activity sorts out the actual investigation data (7156 buildings) of five types of typical structures in towns and villages and establishes the vulnerability and seismic fragility evaluation model of a group of buildings considering multidimensional parameters by using the Chinese macroseismic intensity standard. Using spatial modal, numerical calculation, and regression analysis methods, an updated lognormal distribution vulnerability and resilience assessment model based on multidimensional quantitative parameters is performed. Based on the principle of the conditional probability and damage quantification model, an innovative model (domain, point cloud, curve, surface,
matrix, and function) is established for regional vulnerability and seismic resilience
assessment of typical group buildings. A logarithmic relationship model considering both the updated Chinese macroseismic intensity and three-dimensional composite peak ground acceleration as intensity measures is proposed, and an empirical vulnerability assessment model for typical rural buildings is established. The traditional average earthquake loss index calculation model is updated, and an innovative regional domain vulnerability assessment model is conducted. Taking the samples of various typical structures surveyed in the Yushu earthquake, regional group structure vulnerability domain comparison models of various structures are performed. Ultimately, depending on the typical damage characteristics of structures, the actual damage features and mechanisms of various structures are
analysed.
According to the measured responses to accurately evaluate the seismic damage of structural members can provide suggestions for the repair of damaged structures. In view of the bottleneck problem that the measurable information of structures is limited and the seismic performance of repaired structures is difficult to evaluate, this study established the relationship between the end curvature and the top displacement of members, and discussed the internal relationship of residual displacement, deformation, curvature and damage indexes. From the perspective of energy, a damage evaluation model based on elastic-plastic energy dissipation ratio (EPEDR) is proposed. Considering the deficiency that the repair process is difficult to simulate, a simulation method of damaged structures repair is established. Taken an RC frame structure as an example, selected different damage indexes to quantify the damage of members, and carried out rapid repair analysis according to the damage quantification results and repair strategies. In addition, seismic vulnerability analysis of the repaired damaged structure is performed. The analysis results proved the rapid repair can effectively improve structural performance, and according to residual deformation to guide the repair have the best enhancement effect. Compared with the member-selective repair strategy, the layer-selective repair strategy has a better repair effect.
Considering the difference of cumulative deformation energy between the elastic-plastic state and the ideal elastic state, a structural damage assessment method based on the generalized elastic-plastic energy dissipation ratio (GEPEDR) is proposed. To solve the problem that the actual structure dynamic response in the ideal elastic state is difficult to predict, a method to deduce the dynamic response in the ideal elastic state according to Kalman filter is proposed. Based on the above research, the overall damage and interlayer damage assessment methods of seismic-damaged structures are presented. The nonlinear finite element analysis of reinforced concrete (RC) frame structures and the shaking table test of the 12-story RC frame structure are taken as examples for verification. The results show that the GEPEDR method can realize damage assessment based on only seismic signals and structural responses and reveal the dynamic evolution process of structural overall damage and the distribution of weak story.
