Seismic control of cable-stayed bridges with bearing uplift using tie-down rope-spring device

ABSTRACT

A tie-down rope-spring device (TRD) is proposed to control bearing uplift of cable-stayed bridges under a design earthquake. The mechanical properties of TRD depict a favorable interaction between its horizontal and vertical directions, i.e. the horizontal displacement results in tie-down force. A procedure is proposed to design the TRD for a case cable-stayed bridge under longitudinal seismic excitations. Analytical results validate the effectiveness of TRDs in restricting bearing uplift of the case bridge, showing a large reduction of uplift displacement at deck end, pounding force at bearings and shear force of the crossbeam.

KEYWORDS:

• Seismic response
• cable-stayed bridge
• bearing uplift
• tie-down rope-spring system
• structural control

Acknowledgments

This research is supported by the University Scientific Research Project of Guangzhou Education Bureau (No. 202032797) and Technology Planning Project of Guangzhou (No. 202102020594). The supports are gratefully acknowledged.

Additional information

Funding

This work was supported by the University Scientific Research Project of Guangzhou Education Bureau [202032797].