An, Jung Hyun

Fragility Curves for a Three-Storey Reinforced Concrete Test Structure of the International Benchmark Smart 2013

Abstract eng:
Within the framework of the international benchmark project SMART 2013 (www.smart2013.eu) the robustness of the half part of a typical simplified electrical nuclear reinforced concrete building (1/4 scale) was investigated under various seismic loading conditions. Most of Nuclear Installations in Europe are located in low seismicity area. The hazard in these zones predicts moderate to large events that are required for the input of risk assessment of critical structures such as nuclear power plants. But there is lack of observed data for such events at the site of study. Therefore, a database of 50 sets of synthetic accelerograms, each set composed by two horizontal components, were applied as seismic excitation to the reinforced concrete structure. These synthetics are compatible with an earthquake of magnitude M = 6.5 at distance 9 km from the source. This paper presents the fragility analysis of the SMART 2013 test structure. The seismic response of the structure has been calculated using the ABAQUS solver. The structure is asymmetric and has been modeled with the three dimensional finiteelement method that consists of conventional shell and beam elements. Concrete damaged plasticity model of ABAQUS has been used for the concrete and a bilinear-elastic perfectly-plastic model for the steel. The structural response is calculated by the full dynamic time history and the pushover analysis. The results of these two calculations are compared and used for the derivation of fragility curves with PGA as seismic indicator. The results from the dynamic analysis indicate that, due to the asymmetrical characteristic of the structure, there is a significant difference in the prediction of probability of damage in X and Y direction of the structure for linear and nonlinear structural behavior. Moreover, the comparison of the lognormal standard deviation shows that nonlinear dynamic analysis gives more accurate results compared to that of the pushover analysis. However, the computational time is considerably reduced in the case of pushover analysis.

Contributors:

Rajan, Sreelakshmy

Conference Title:

Proceedings of the 16th World Conference on Earthquake Engineering

Conference Title:

16th World Conference on Earthquake Engineering

Conference Venue:

Santiago (CL)

Conference Dates:

2017-01-09 / 2017-01-13

Rights:

Text je chráněný podle autorského zákona č. 121/2000 Sb.