Seismic behavior of Fatih Sultan Mehmet Suspension Bridge under spatially variation ground motion

2014 ◽  
pp. 2018-2023
Author(s):  
N Apaydin ◽  
S Bas
Keyword(s):  
Ground Motion ◽  
Seismic Behavior ◽  
Suspension Bridge

SEISMIC BEHAVIOR OF SUPER LONG MULTI-SPAN SUSPENSION BRIDGE WITH CENTER SPAN LENGTH OF 3000M

2018 ◽  
Vol 74 (4) ◽  
pp. I_803-I_817
Author(s):  
Shingo IWASHITA ◽  
Hitoshi NAKAMURA ◽  
Kuniei NOGAMI ◽  
Yusuke KISHI ◽  
Kazuya MAGOSHI ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Suspension Bridge ◽  
Span Length

scholarly journals Effect of the Directional Components of Earthquakes on the Seismic Behavior of an Unanchored Steel Tank

2020 ◽  
Vol 10 (16) ◽  
pp. 5489
Author(s):  
Rulin Zhang ◽  
Shili Chu ◽  
Kailai Sun ◽  
Zhongtao Zhang ◽  
Huaifeng Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Ground Motion ◽  
Seismic Behavior ◽  
Axial Stress ◽  
Ground Motions ◽  
Great Influence ◽  
Liquid Sloshing ◽  
Base Shear ◽  
Element Method

This paper investigates the effect of the multi-directional components of ground motion on an unanchored steel storage tank. Both the liquid sloshing effect and contact behavior between the foundation and tank are included in the study. A three-dimensional model for a foundation–structure–liquid system is numerically simulated using the finite element method. The Lagrange fluid finite element method (FEM) in ANSYS is used to consider the liquid–solid interaction. In the liquid–structure–foundation interaction model, the contact and target elements are adapted to simulate the nonlinear uplift and slip effects between the tank and the foundation. Three earthquake ground motions are selected for evaluating the seismic behavior of the tank. Comparisons are made on the horizontal displacement, “elephant-foot” deformation, stress, base shear and moment, sloshing of the liquid, uplift, as well as slip behavior under the application of the unidirectional, bi-directional and tri-directional components. Under the selected ground motions, the horizontal bi-directional seismic component has great influence on the liquid sloshing in the tank studied in this paper. The vertical seismic component produces high compressive axial stress, and it also makes the uplift and slide of the tank bottom increase significantly. The applicability of this conclusion should be carefully considered when applied to other types of ground motion inputs.

scholarly journals Sequential Ground Motion Effects on the Behavior of a Base-Isolated RCC Building

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Zhi Zheng ◽  
Xiaolan Pan ◽  
Xu Bao
Keyword(s):  
Reinforced Concrete ◽  
Ground Motion ◽  
Seismic Behavior ◽  
Base Isolation ◽  
Ground Motions ◽  
Dynamic Responses ◽  
Seismic Evaluation ◽  
Isolation Technique ◽  
Seismic Sequences ◽  
Significant Underestimation

The sequential ground motion effects on the dynamic responses of reinforced concrete containment (RCC) buildings with typical isolators are studied in this paper. Although the base isolation technique is developed to guarantee the security and integrity of RCC buildings under single earthquakes, seismic behavior of base-isolated RCC buildings under sequential ground motions is deficient. Hence, an ensemble of as-recorded sequential ground motions is employed to study the effect of including aftershocks on the seismic evaluation of base-isolated RCC buildings. The results indicate that base isolation can significantly attenuate the earthquake shaking of the RCC building under not only single earthquakes but also seismic sequences. It is also found that the adverse aftershock effect on the RCC can be reduced due to the base isolation applied to the RCC. More importantly, the study indicates that disregarding aftershocks can induce significant underestimation of the isolator displacement for base-isolated RCC buildings.

scholarly journals Seismic Behavior of Bridges Considering Ground Motion Spatial Variation

2015 ◽  
Vol 35 (4) ◽  
pp. 759-768
Author(s):  
Byung Ho Bae ◽  
Kwang Kyu Choi ◽  
Seung Woo Kang ◽  
Si Young Song
Keyword(s):  
Spatial Variation ◽  
Ground Motion ◽  
Seismic Behavior

Effects of ground motion directionality on seismic behavior of skewed bridges considering SSI

2019 ◽  
Vol 127 ◽  
pp. 105820 ◽  
Author(s):  
H.R. Noori ◽  
M.M. Memarpour ◽  
M. Yakhchalian ◽  
S. Soltanieh
Keyword(s):  
Ground Motion ◽  
Seismic Behavior ◽  
Skewed Bridges ◽  
Motion Directionality

scholarly journals Seismic Behavior of LRB and FPS Type Isolators Considering Torsional Effects

2021 ◽  
Author(s):  
Esra Ozer ◽  
Mehmet Inel ◽  
Bayram Tanik Cayci
Keyword(s):  
Ground Motion ◽  
Seismic Behavior ◽  
Time History ◽  
Nonlinear Behavior ◽  
Shear Walls ◽  
Rc Frame ◽  
Structural Members ◽  
Earthquake Records ◽  
Frame Building ◽  
Ground Motion Records

Abstract This study aims to investigate seismic behavior of LRB and FPS type base isolated models considering torsional irregularity due to distance between stiffness center of isolators and mass center of superstructure for low- and mid-rise reinforced concrete (RC) frame buildings with no shear walls. Nonlinear behavior of structural members was also considered to be able to observe probable yielding of structural members in superstructure due to the torsional irregularity. 528 different nonlinear time history analyses of 3-dimensional 3, 5, 7 and 9-story models subjected to 11 pairs of earthquake records were performed. The results indicate that FPS type isolators tend higher displacement demands while LRB type isolators are more sensitive to torsional effects. Torsional irregularity coefficient values of LRB models with 20% eccentricity are 47% higher than symmetrical models in terms of averages. Since significant part of the demands is absorbed by the isolator system, the remaining seismic demands for the superstructure is relatively low. Besides, the outcomes underline the careful selection of number of ground motion records in dynamic analysis as mentioned in the literature. While some studies in the literature indicate that torsional effects due to 10% or 20% eccentricity have significant role on building response, they used very limited building models subjected to a few earthquake records. The use of four different RC frame building model with LRB and FPS type isolators subjected to 11 pairs of ground motion records do not strongly support the abovementioned studies in literature. Therefore, more research is needed in this field.

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