Incremental dynamic analysis has been extended by introducing a set of structural models in addition to the set of ground motion records which is employed in IDA analysis in order to capture record-to-record variability. The set of structural models reflects epistemic uncertainties, and is determined by utilizing the latin hypercube sampling (LHS) method. The effects of both aleatory and epistemic uncertainty on seismic response parameters are therefore considered in extended IDA analysis. It is shown that epistemic uncertainty could have a significant influence on collapse capacity
COBISS.SI-ID: 4362337
A computing environment for the seismic performance assessment of reinforced concrete frames has been developed in Matlab in combination with OpenSees. It includes several functions which provide calculations of the moment-rotation relationship of plastic hinges in columns and beams, rapid determination of simplified nonlinear structural models, the post-processing of the results of analyses and structural performance assessment. PBEE toolbox is demonstrated by means of different examples
COBISS.SI-ID: 5018209
Incremental dynamic analysis (IDA) enables direct evaluation of the record-to-record variability in structural response through a set of ground-motion records. To facilitate its practical application, a precedence list of ground-motion records has been introduced, aiming at selecting the most representative ground-motion records for IDA analysis. Seismic response is therefore computed progressively, starting from the first ground-motion record in the precedence list. After an acceptable tolerance has been achieved, the analysis is terminated.
COBISS.SI-ID: 5169249
A simplified methodology for seismic performance evaluation with consideration of performance degradation over time, which is usually neglected in seismic design and risk assessment, is presented and applied to an example of an older three-storey asymmetric reinforced concrete building, in which corrosion has just started to propagate. The time-averaged annual probability of failure increases for the corroded building by 10% in comparison to the typical case without corrosion. However, it can be magnified by almost 40% if the near-collapse limit state is related to a brittle shear failure.
COBISS.SI-ID: 5342561
A web application for prediction of approximate IDA curves of reinforced concrete structures was developed. It enables determination of the approximate 16th, 50th and 84th fractile response of a reinforced concrete structures. The approximate IDA curves are predicted by performing the n-dimensional linear interpolation based on the response database of the SDOF system. The proposed approach significantly improves the simplified nonlinear procedures for seismic performance or risk assessment of structures, which are prescribed in different structural codes and guidelines.
COBISS.SI-ID: 5107809