Influence of different damping components on dynamic response of concrete rocking walls

dc.contributor.author Nazari, Maryam
dc.contributor.author Sritharan, Sri
dc.contributor.department Civil, Construction and Environmental Engineering
dc.date 2020-04-09T15:05:41.000
dc.date.accessioned 2020-06-30T01:13:19Z
dc.date.available 2020-06-30T01:13:19Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2020
dc.date.embargo 2021-04-03
dc.date.issued 2020-06-01
dc.description.abstract <p>Precast concrete rocking walls with unbonded post-tensioning, as a seismic resilient system, dissipate energy imparted to them during an earthquake through inherent viscous damping, impact damping due to the wall rocking on top of the foundation, and any available hysteretic damping. A shake table study on eight rocking walls designed with different quantities of hysteretic damping ratio varying between 4% for a Single Rocking Wall (SRW) to 15% for a rocking wall system, known as PreWEC, with supplemental hysteretic dampers, i.e., O-connectors, generally demonstrated their satisfactory seismic performance during design-level and higher intensity earthquake motions. The test results confirmed lower participation of energy dissipation due to impacts as the hysteretic component increased. Larger hysteretic damping also led to a reduction in the maximum drift of rocking walls as well as the number of large drift excursions after the first peak of response. Using the area enclosed by the force-displacement hysteresis response of O-connectors, recommended design values for hysteretic damping of PreWEC systems are presented in this paper. While larger displacement amplitudes were achieved for the walls with lower hysteretic damping (i.e., SRWs), it is shown that the duration of their dynamic responses was reduced due to a negative rate of input energy in these rocking walls, which favorably removed a part of the seismic energy imparted to the system. Contrary to a common belief that rocking walls without additional damping devices are not dependable lateral load resisting systems, this paper concludes that these walls attract less seismic input energy and perform satisfactorily with a small amount of inherent damping, suggesting their potential application in seismic resistant structures.</p>
dc.description.comments <p>This is a manuscript of an article published as Nazari, Maryam, and Sri Sritharan. "Influence of different damping components on dynamic response of concrete rocking walls." <em>Engineering Structures</em> 212 (2020): 110468. DOI: <a href="https://doi.org/10.1016/j.engstruct.2020.110468" target="_blank">10.1016/j.engstruct.2020.110468</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ccee_pubs/270/
dc.identifier.articleid 1271
dc.identifier.contextkey 17323230
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ccee_pubs/270
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/13926
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ccee_pubs/270/2020_SritharanSri_InfluenceDifferent.pdf|||Fri Jan 14 23:06:17 UTC 2022
dc.source.uri 10.1016/j.engstruct.2020.110468
dc.subject.disciplines Geotechnical Engineering
dc.subject.keywords Unbonded post-tensioning
dc.subject.keywords Precast concrete wall
dc.subject.keywords Impact damping
dc.subject.keywords Hysteretic energy dissipation
dc.subject.keywords Shake table testing
dc.subject.keywords Maximum seismic response
dc.subject.keywords Rocking Wall
dc.subject.keywords PreWEC
dc.title Influence of different damping components on dynamic response of concrete rocking walls
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication d8ab098a-ad2c-47af-b18e-fb1a8e963178
relation.isOrgUnitOfPublication 933e9c94-323c-4da9-9e8e-861692825f91
File
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
2020_SritharanSri_InfluenceDifferent.pdf
Size:
1.38 MB
Format:
Adobe Portable Document Format
Description:
Collections