Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 81, Number 2, January25 2022 , pages 147-161 DOI: https://doi.org/10.12989/sem.2022.81.2.147 |
|
|
|
Brace-type shear fuses for seismic control of long-span three-tower self-anchored suspension bridge |
||
Feifei Shao, Liangjiu Jia and Hanbin Ge
|
||
| Abstract | ||
| The Brace-Type Shear Fuse (BSF) device is a newly proposed steel damper with excellent cumulative ductility and stable energy dissipation. In consideration of the current situation where there are not many alternatives for transversal seismic devices used in long-span three-tower self-anchored bridges (TSSBs), this paper implements improved BSFs into the world's longest TSSB, named Jinan Fenghuang Yellow River Bridge. The new details of the BSF are developed for the TSSB, and the force-displacement hysteretic curves of the BSFs are obtained using finite element (FE) simulations. A three-dimensional refined finite element model for the research TSSB was established in SAP2000, and the effects of BSFs on dynamic characteristics and seismic response of the TSSB under different site conditions were investigated by the numerical simulation method. The results show that remarkable controlling effects of BSFs on seismic response of TSSBs under different site conditions were obtained. Compared with the case without BSFs, the TSSB installed with BSFs has mitigation ratios of the tower top displacement, lateral girder displacement, tower bending moment and tower shear force exceeding 95%, 78%, 330% and 346%, respectively. Meanwhile, BSFs have a sufficient restoring force mechanism with a minor post-earthquake residual displacement. The proposed BSFs exhibit good application prospects in long-span TSSBs. | ||
| Key Words | ||
| brace-type shear fuse; hysteretic damper; seismic performance; self-anchored suspension bridge; threetower; time history analysis | ||
| Address | ||
| Feifei Shao: Department of Civil Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, 468-8502, Japan Liangjiu Jia: State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, No.1239, Siping Rd., Shanghai 200092, PR China; Department of Disaster Mitigation for Structures, Tongji University, No.1239, Siping Rd., Shanghai 200092, PR China Hanbin Ge: Department of Civil Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya, 468-8502, Japan | ||