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Haseli B. The effect of abutment modeling on the seismic response of bridge Under the earthquake records. JCES 2017; 1 (2) :22-41
URL: http://journals.lu.ac.ir/jces/article-1-35-en.html

One of the influential factors in the response of the collapse of the bridge and the collage is its modeling. Seismic behavior analysis and bridging modeling are usually performed using simplifying assumptions. This simplification may lead to major changes in the prediction of bridle shaking behavior. In this research, the collapses in three general modes of modeling under the influence of earthquake records in the near field (due to the occurrence of the critical behavior of the bridge under the influence of near-field records in comparison with the far-field domains) were analyzed by nonlinear time-based analysis method in SAP 2000 software and the results in scenarios Different collage modeling is compared. Of noteworthy points in this study is the modeling of the shells as a wall base and the equivalent hardness calculation using static pressure and dynamic pressure of the back of the collar. The results of the analysis show that the modeling of the end nests in addition to the bridge displacement on other seismic parameters including axial force distribution, bending anchor, anchor response, and base cutting effect, in such a way that the results represent the maximum difference of 78% in the longitudinal displacement of the end nests , The 90% difference in the central axis force and the 82% difference in the bending relationship between the middle base based on the collage modeling is simplified, compared to the modeling of the collage as a roller. On the other hand, the results of studies in this study show that with the height of the back of the knoll in the range of 4 to 9 meters in height, with acceptable accuracy (the difference of responses is 29% to 13%), the collateral modeling can be replaced in the base form of Diviara Designed for modeling the shell according to the Caltrance directive (2013).