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http://dx.doi.org/10.12989/cac.2018.21.4.355

Direct displacement-based seismic assessment of concrete frames  

Peng, Chu (Department of Civil Engineering, South China University of Technology)
Guner, Serhan (Department of Civil and Environmental Engineering, University of Toledo)
Publication Information
Computers and Concrete / v.21, no.4, 2018 , pp. 355-365 More about this Journal
Abstract
Five previously-tested reinforced concrete frames were modelled using a nonlinear finite element analysis procedure to demonstrate the accurate response simulations for seismically-deficient frames through pushover analyses. The load capacities, story drifts, and failure modes were simulated. This procedure accounts for the effects of shear failures and the shear-axial force interaction, and thus is suitable for modeling seismically-deficient frames. It is demonstrated that a comprehensive analysis method with a capability of simulating material constitutive response and significant second-order mechanisms is essential in achieving a satisfactory response simulation. It is further shown that such analysis methods are invaluable in determining the expected seismic response, safety, and failure mode of the frame structures for a performance-based seismic evaluation. In addition, a new computer program was developed to aid researchers and engineers in the direct displacement-based seismic design process by assessing whether a frame structure meets the code-based performance requirements by analyzing the analysis results. As such, the proposed procedure facilitates the performance-based design of new buildings as well as the numerical assessment and retrofit design of existing buildings. A sample frame analysis was presented to demonstrate the application and verification of the approach.
Keywords
computational mechanics; computer modeling; seismic evaluation of existing buildings; software development & applications; structural safety;
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