Shen, Yu;
Li, Jianzhong;
Freddi, Fabio;
Igarashi, Akira;
Zhou, Jian;
(2022)
Numerical investigation of transverse steel damper (TSD) seismic system for suspension bridges considering pounding between girder and towers.
Soil Dynamics and Earthquake Engineering
, 155
, Article 107203. 10.1016/j.soildyn.2022.107203.
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Shen et al_2022_Numerical investigation of transverse steel damper (TSD) seismic system for suspension bridges considering pounding between girder and towers - Authors Version.pdf - Accepted Version Download (2MB) | Preview |
Abstract
Transverse steel damper (TSD) is a promising passive control device used for seismic isolation and has been validated to feasibly balance the girder transverse seismic displacement and inertial force in cable-stayed bridges. However, for the TSD system, transverse pounding could occur at the locations of girder and tower legs when the gap size is insufficient to accommodate the girder-support transverse relative displacement under major earthquakes. Transverse pounding can significantly affect the dynamic responses of bridge structures, hence, the present paper investigates the effectiveness of TSD as a control strategy for transverse seismic responses in long-span bridge structures (i.e., suspension bridges), accounting also for the influence of the pounding effect in the dynamic response analysis. A typical suspension bridge is considered for case study purposes, and four transverse girder-support connection systems are investigated, including the conventional fixed and sliding-free connections and the TSD connections with and without pounding effect. A comprehensive comparison of the seismic performance among these transverse restraining systems is conducted through Incremental Dynamic Analysis and fragility analysis. Additionally, the effect of seismic-induced pounding in the TSD system is assessed from an energetic point of view. The results show that, for the suspension bridge with TSDs as the transverse control strategy, a satisfactory balance between force and displacement demands can be obtained in small-to medium-intensity earthquakes. However, the pounding between the girder and tower legs during large-intensity earthquakes can substantially increase the seismic demands in the tower legs.
| Type: | Article |
|---|---|
| Title: | Numerical investigation of transverse steel damper (TSD) seismic system for suspension bridges considering pounding between girder and towers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.soildyn.2022.107203 |
| Publisher version: | https://doi.org/10.1016/j.soildyn.2022.107203 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Suspension bridges, Transverse steel damper system, Pounding response, Incremental dynamic analysis, Fragility curves, Seismic assessment |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10144258 |
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