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- Publisher Website: 10.12989/sss.2018.22.3.315
- Scopus: eid_2-s2.0-85053510152
- WOS: WOS:000444446200006
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Article: Identification of plastic deformations and parameters of nonlinear single-bay frames
Title | Identification of plastic deformations and parameters of nonlinear single-bay frames |
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Authors | |
Keywords | Nonlinear single-bay frames Parameters estimation Plastic rotation Stiffness parameter Unknown excitation |
Issue Date | 2018 |
Publisher | Techno-Press. The Journal's web site is located at http://www.techno-press.org/?journal=sss&subpage=5 |
Citation | Smart Structures and Systems, 2018, v. 22 n. 3, p. 315-326 How to Cite? |
Abstract | This paper presents a novel time-domain method for the identification of plastic rotations and stiffness parameters of single-bay frames with nonlinear plastic hinges. Each plastic hinge is modelled as a pseudo-semi-rigid connection with nonlinear hysteretic moment-curvature characteristics at an element end. Through the comparison of the identified end rotations of members that are connected together, the plastic rotation that furnishes information of the locations and plasticity degrees of plastic hinges can be identified. The force consideration of the frame members may be used to relate the stiffness parameters to the elastic rotations and the excitation. The damped-least-squares method and damped-and-weighted-least-squares method are adopted to estimate the stiffness parameters of frames. A noise-removal strategy employing a de-noising technique based on wavelet packets with a smoothing process is used to filter out the noise for the parameter estimation. The numerical examples show that the proposed method can identify the plastic rotations and the stiffness parameters using measurements with reasonable level of noise. The unknown excitation can also be estimated with acceptable accuracy. The advantages and disadvantages of both parameter estimation methods are discussed. |
Persistent Identifier | http://hdl.handle.net/10722/264006 |
ISSN | 2023 Impact Factor: 2.1 2023 SCImago Journal Rankings: 0.569 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Au, FTK | - |
dc.contributor.author | Yan, ZH | - |
dc.date.accessioned | 2018-10-22T07:48:00Z | - |
dc.date.available | 2018-10-22T07:48:00Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Smart Structures and Systems, 2018, v. 22 n. 3, p. 315-326 | - |
dc.identifier.issn | 1738-1584 | - |
dc.identifier.uri | http://hdl.handle.net/10722/264006 | - |
dc.description.abstract | This paper presents a novel time-domain method for the identification of plastic rotations and stiffness parameters of single-bay frames with nonlinear plastic hinges. Each plastic hinge is modelled as a pseudo-semi-rigid connection with nonlinear hysteretic moment-curvature characteristics at an element end. Through the comparison of the identified end rotations of members that are connected together, the plastic rotation that furnishes information of the locations and plasticity degrees of plastic hinges can be identified. The force consideration of the frame members may be used to relate the stiffness parameters to the elastic rotations and the excitation. The damped-least-squares method and damped-and-weighted-least-squares method are adopted to estimate the stiffness parameters of frames. A noise-removal strategy employing a de-noising technique based on wavelet packets with a smoothing process is used to filter out the noise for the parameter estimation. The numerical examples show that the proposed method can identify the plastic rotations and the stiffness parameters using measurements with reasonable level of noise. The unknown excitation can also be estimated with acceptable accuracy. The advantages and disadvantages of both parameter estimation methods are discussed. | - |
dc.language | eng | - |
dc.publisher | Techno-Press. The Journal's web site is located at http://www.techno-press.org/?journal=sss&subpage=5 | - |
dc.relation.ispartof | Smart Structures and Systems | - |
dc.subject | Nonlinear single-bay frames | - |
dc.subject | Parameters estimation | - |
dc.subject | Plastic rotation | - |
dc.subject | Stiffness parameter | - |
dc.subject | Unknown excitation | - |
dc.title | Identification of plastic deformations and parameters of nonlinear single-bay frames | - |
dc.type | Article | - |
dc.identifier.email | Au, FTK: francis.au@hku.hk | - |
dc.identifier.authority | Au, FTK=rp00083 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.12989/sss.2018.22.3.315 | - |
dc.identifier.scopus | eid_2-s2.0-85053510152 | - |
dc.identifier.hkuros | 294100 | - |
dc.identifier.volume | 22 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 315 | - |
dc.identifier.epage | 326 | - |
dc.identifier.isi | WOS:000444446200006 | - |
dc.publisher.place | Korea, Republic of | - |
dc.identifier.issnl | 1738-1584 | - |