Appropriate selection of isolator properties to enhance the seismic performance of seismic-isolated bridges in near-fault zones

Date

2021-01-01

Author

Dicleli, Murat
Karalar, M.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

84
views

0
downloads

© 2021 Taylor & Francis Group, LondonThis paper examines the selection of optimum isolator properties, namely characteristic strength, Qd, and post-elastic stiffness, kp, for bridges located in near-fault regions. First, a two-phased sensitivity analysis is conducted to evaluate the influence of bridge, isolator, and near-fault ground motion parameters on optimum levels of Qd and kp based on minimizing maximum isolator displacement and force. In the first phase of sensitivity analyses, a screening via design of experiments principles is performed to assess the statistical significance of various parameters on the optimum isolator properties. The second phase includes rigorous sensitivity analyses to assess the trends in optimum Qd and kp as a function of the bridge, isolator, and near-fault ground motion parameters. Next, nonlinear time history analyses of typical seismically isolated bridges are conducted for a suite of near-fault ground motions across a range of values of the identi-fied parameters to enable the development of parametric equations for optimum Qd and kp to minimize isolator force or displacement. The parametric equations are validated using an alternate suite of near-fault ground motions. Furthermore, the dispersion about the predictive equations are quantified and assessed. It is observed that the developed equations produced reasonable estimates of optimum isolator properties with a relatively consistent dispersion across the modeling parameters. Moreover, it is observed that for near fault ground motions with high intensity and strong directivity, supplemental energy dissipation devices are re-quired to minimize the isolator-displacements.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117567010&origin=inward
https://hdl.handle.net/11511/99002

DOI

https://doi.org/10.1201/9780429279119-548

Conference Name

10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020

Collections

Department of Engineering Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Effective Stress Based Large Strain Modulus Degradation Response of Fully Saturated Clean Sands Bilge, Habib Tolga; Çetin, Kemal Önder (2015-9-11) Current state of practice to assess ground response under seismic loading is mostly based on well-known and widely-used total stress-based equivalent linear assessment methodology, as part of which, mostly, strain compatible shear modulus and damping relationships need to be used. As implied by its name, "total stress", accumulation of excess pore water pressure which is a significant component of cyclic response, is not considered. Neglection of this component will produce unconservatively biased deformati...
Evaluation of a recently proposed record selection and scaling procedure for low-rise to mid-rise reinforced concrete buildings and its use for probabilistic risk assessment studies Ay, Bekir Özer (2014-05-01) This paper evaluates a recent record selection and scaling procedure of the authors that can determine the probabilistic structural response of buildings behaving either in the elastic or post-elastic range. This feature marks a significant strength on the procedure as the probabilistic structural response distribution conveys important information on probability-based damage assessment. The paper presents case studies that show the utilization of the proposed record selection and scaling procedure as a too...
Experimental and numerical study of process-induced total spring-in of corner-shaped composite parts Cicek, K. Furkan; Erdal Erdoğmuş, Merve; Kayran, Altan (2017-07-01) Process-induced total spring-in of corner-shaped composite parts manufactured via autoclave-forming technique using unidirectional prepreg is studied both numerically and experimentally. In the numerical study, a three-dimensional finite element model which takes into account the cure shrinkage of the resin, anisotropic material properties of the composite part and the tool-part interaction is developed. The outcome of the numerical model is verified experimentally. For this purpose, U-shaped composite part...
Application of acoustic emission for damage classification and assessment of corrosion in pre-stressed concrete pipes Goldaran, Reza; Türer, Ahmet (Elsevier BV, 2020-08-01) The present study describes the usage of the AE technique for detecting different types of damage in corrosion process with characterization of corresponding AE sources in pre-stressed concrete cylinder pipes. Firstly, several small-scale tests were implemented to specify the characteristics of AE sources including water absorption of concrete, hydrogen bubbles bursting and concrete cracks, as well as determining the appropriate sensors positions. Later on, a full-scale pre-stressed pipe was subjected to co...
Thermal analysis of a new thiophene derivative and its copolymer Aslan, E.; Toppare, Levent Kamil; Hacaloğlu, Jale (2008-06-01) Thermal characteristics of a new thiophene derivative, 2-(thiophen-3-yl-)ethyl octanoate (OTE), its homopolymer (POTE), and copolymer with thiophene P(OTE-co-Th) were investigated via pyrolysis mass spectrometry. Thermal degradation of the copolymer started by lose of side chains and thiophene involving products evolved almost in the same temperature range where PTh degradation was detected, at slightly higher temperatures than PTh backbone decomposed during the pyrolysis of POTE. The extent of doping and n...

Citation Formats

M. Dicleli and M. Karalar, “Appropriate selection of isolator properties to enhance the seismic performance of seismic-isolated bridges in near-fault zones,” presented at the 10th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2020, Sapporo, Japonya, 2021, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117567010&origin=inward.