Development of computing environment for the seismic performance assessment of reinforced concrete frames by using simplified nonlinear models |
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| Authors: | Matjaz Dolsek |
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| Institution: | (1) Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, SI 1000 Ljubljana, Slovenia |
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| Abstract: | 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 with different methods. The user can add new functions to
the PBEE toolbox in order to support additional procedures for the seismic performance assessment of RC frames, or can just
change the rules for determining the moment-rotation relationship of plastic hinges in columns and beams, which are the main
source of uncertainty in simplified nonlinear models. In the paper, the capabilities of the computing environment (PBEE toolbox)
are first explained by focusing on the procedures for determining the moment-rotation relationship of plastic hinges. Different
examples are then presented, starting with a comparison between the calculated response of a four-storey RC frame building
and the response obtained in a pseudo-dynamic experiment. The calculated response was determined with the two different structural
models which are later on used for the demonstration of the seismic performance assessment of the same structure by the N2
method. Lastly, seismic performance assessment of an eight-storey frame is performed by using incremental dynamic analysis
with consideration of the modelling uncertainties. |
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