Parametric Study of SMA-based Friction Pendulum System for Response Control of Bridges under Near-Fault Ground Motions

ABSTRACT

This article presents a sensitivity study on shape memory alloy (SMA)-based friction pendulum bearings (FPBs) for response control of a three-span continuous isolated bridge. The responses of the bridge isolated with SMA-based FPB system are compared with those of the bridge isolated with FPB system. The effectiveness of SMA-based FPB system for response control is investigated through a case study. Results show that the residual displacement and peak displacement can be effectively reduced without significantly increasing the base forces of the bridge piers. The SMA-based FPB system can provide reliable recentering and energy dissipation capabilities for bridges against near-fault earthquakes.

KEYWORDS:

• Bridge
• seismic isolation
• friction pendulum bearing
• shape memory alloy
• superelasticity
• near-fault ground motion
• response control

Acknowledgments

The research described in this article was financially supported by the National Science Foundation of China (No. 51578151 and 51722804), the Key Research & Development Plan Program of Jiangsu Province (No. BE2018120), the National Ten Thousand Talent Program for Young Top-notch Talents, the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_0117). The authors also would like to thank the data provided by the Pacific Earthquake Research Center.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51578151,51722804]; National Ten Thousand Talent Program for Young Top-notch Talents (W03070080); Key Research & Development Plan Program of Jiangsu Province [BE2018120]; Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_0117]; National Scholarship Fund of China Scholarship Council (201806090090).