Nonlinear Finite-Element Modeling of Precast Reinforced Concrete Moment-Resisting Frames
(*) Corresponding author
DOI: https://doi.org/10.15866/irece.v13i6.21564
Abstract
Modeling of precast reinforced concrete frames using three-dimensional solid elements and inelastic contact elements is a very difficult process. Therefore, several two-dimensional nonlinear models using inelastic frame elements and zero-length spring elements were introduced in recent decades. This paper aims to present a static and dynamic nonlinear time history analysis of cast-in-place and precast reinforced concrete frames and to predict the performance of these frames under earthquakes. One other objective is to simplify and improve the pinching effect and the energy dissipation characteristics of the precast beam-column joint model conducted by other analytical studies. All details of the nonlinear models and their specified parameters were introduced. The analytical model was verified with the available experimental tests of the beam-column joints and the moment-resisting frames. The results proved that the improved nonlinear beam-column joint model was better than the old model especially in estimating the load capacity, the pinching effect, and the energy dissipation characteristics. Generally, the nonlinear model can predict the seismic response of precast frames with acceptable accuracy.
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