Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Variations in the hysteretic behavior of LRBs as a function of applied loading
Date
2018-07-10
Author
ÖZDEMİR, GÖKHAN
BAYHAN, BEYHAN
Gulkan, Polat
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
212
views
0
downloads
Cite This
The study presented herein focused on the change in hysteretic force-deformation behavior of lead rubber bearings (LRBs). The material model used to idealize response of LRBs under cyclic motion is capable of representing the gradual attrition in strength of isolator unit on account of lead core heating. To identify the effect of loading history on the hysteretic response of LRBs, a typical isolator unit is subjected to cyclic motions with different velocity, amplitude and number of cycles. Furthermore, performance of an LRB isolated single degree of freedom system is studied under different seismic input levels. Finally, the significance of lead core heating effect on LRBs is discussed by considering the current design approach for base isolated structures. Results of this study show that the response of an LRB is governed strongly by the amplitude and number of cycles of the motion and the considered seismicity level.
Subject Keywords
Lead rubber bearing
,
Isolator tests
,
Quality control tests
,
Seismic isolation
,
Lead core heating
URI
https://hdl.handle.net/11511/67320
Collections
Department of Mathematics and Science Education, Book / Book chapter
Suggestions
OpenMETU
Core
Effect of lead core heating on the seismic performance of bridges isolated with LRB in near-fault zones
Ozdemir, Gokhan; Dicleli, Murat (2012-11-01)
In this paper, the effect of lead core heating and associated strength deterioration on the seismic response of bridges isolated with lead rubber bearings (LRB) is investigated as a function of the characteristics of the isolator and near fault ground motions with forward rupture directivity effect. Furthermore, the ability of bounding analyses to provide a design envelope for maximum isolator force and maximum isolator displacement is verified. For this purpose, a series of nonlinear dynamic analyses are c...
Change in optimal pump-and-treat remediation design and cost for different correlation lengths of spatially variable hydraulic conductivity field
Gungor-Demirci, G.; Aksoy, Ayşegül (2011-11-01)
In this study, variations in optimal pump-and-treat (P&T) remediation designs and costs for a contaminated and mass-transfer-limited aquifer are investigated for different hydraulic conductivity (K) heterogeneity conditions with focus on the influence of the correlation length (lambda) of spatially variable K values. Several heterogeneous K fields with diverse lambda values and variances (sigma(2)) are considered. The impact of lambda on optimal remediation design selection is analysed considering different...
Effects of Montmorillonite Content and Maleic Anhydride Compatibilization on the Mechanical Behavior of Polylactide Nanocomposites
Sarı, Burcu (2016-08-01)
The aim of this study was to investigate the effects of montmorillonite (MMT) type nanoclay content and maleic anhydride (MA) grafted polylactide (PLA) copolymer compatibilization on the mechanical properties of PLA nanocomposites; compounded by twin-screw extrusion melt-mixing followed with injection molding for shaping of bulk specimens. Successively intercalated and exfoliated structures of the nanocomposites were observed by XRD and TEM analysis, including the chemical interactions by FTIR. Mechanical t...
Effects of chromic acid anodizing on fatigue behavior of 7050 T7451 aluminum alloy
Ilhan, Cagri; Gürbüz, Rıza (2021-09-01)
The effect of chromic acid anodizing (CAA) surface treatment on 7050 T7451 aluminum alloy was presented in this study in terms of fatigue behavior. CAA is a treatment against corrosion by producing aluminum oxide layer (Al2O3) at the surface. However, fatigue performance of 7050 T7451 is affected by the coating. In this study, eight different CAA processes were examined with regard to etching stage of pre-treatments by using an alkaline etchant and/or acid etchants with various immersion times. Optical micr...
EFFECT OF AGING ON MECHANICAL PROPERTIES OF Al-8Si-8Fe-1.4V/SiCp COMPOSITES
Essari, A.; Sariuglo, F.; Petrovic, Z.; Sedmak, A.; Samardzic, I. (2016-01-01)
In this study, Al-8Fe-8Si-1.4V/SiCp composites fabricated by squeeze casting process were age-hardened to study the influence of heat treatment on mechanical properties, such as hardness, bending strength and modulus of elasticity. The cast samples were solid soluted at 540 degrees C for one hour, then quenched in water to room temperature, and finally aged at 190 degrees C for 2, 4, 6, 8 and 10 hours for hardness test and at 195 degrees C for 2, 6 and 10 hours for bending strength determination.
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. ÖZDEMİR, B. BAYHAN, and P. Gulkan,
Variations in the hysteretic behavior of LRBs as a function of applied loading
. 2018, p. 78.
