Abstract
In recent years, the issue of lower computational cost and analysis time has been the important factors for the structural analysts. In the meantime, after years of its introduction as an analysis having features of nonlinear analysis, the Fast Nonlinear Analysis (FNA) claims to have a higher performance speed than other nonlinear analyses, but has been less used by the researchers in this field. This research is conducted in order to improve the accuracy of the claim for a significant difference between the duration of structural analysis using the FNA method in comparison with the Nonlinear Time History Analysis (NLTHA) in Sap2000 software. RC frame with two seismic resistant systems of Moment Resistant Frame (MRF) only and MRF equipped by visco-elastic dampers (MRF-VD) and efficiency of the FNA method has been investigated. The results indicated that in the analysis time, the structural analysis is decreased by 7-9 times, while the seismic fragility curves calculated for performance limit state of the frame does not provide an accurate estimate of the damage to the frame.
Highlights
Finite element analysis is one of the popular methods of structural analysis
In this research and with studying the samples, it was found that Fast Nonlinear Analysis (FNA), despite its deficits, can be used in cases where the designer intends to observe nonlinear behavior of structures with small importance factor as well as fewer nonlinear elements
It should be noted that FNA has higher speed of implementation than Nonlinear Time History Analysis (NLTHA) by several times
Summary
Finite element analysis is one of the popular methods of structural analysis. Many researchers have used this method for analysis of micro and macro models of different structures. (Sayyar-Roudsari et al, 2018a) have carried out extensive studies on RC members by ABAQUS software. (Sayyar-Roudsari et al, 2018a) have carried out extensive studies on RC members by ABAQUS software. One of the most important parameters that should be investigated for structures such as bridges is the effect of impact loads due to vehicle accidents, causing progressive damages to bridges and the effect of cyclic loading due to earthquake force (Sayyar-Roudsari et al, 2018b; Soleimani et al, 2015). (Sayyar-Roudsari et al, 2018a) have investigated comprehensive numerical and finite element studies by MATLAB and ABAQUS to identify the damage to concrete bridges and presented reinforcement strategies by composite fibers (Sayyar-Roudsari et al, 2018b; Ashrafi et al, 2018) using finite element method, have examined the nonlinear behavior of wavy steel shear walls. Providing seismic fragility to study on other structures such as dam seismic performance has been done by
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