Seismic design of high-rise towers for cable-stayed bridges under strong earthquakes

Abstract

This paper presents the first of a series of studies on the seismic design of high-rise towers for cable-stayed bridges under strong earthquakes. One practical cable-stayed bridge with a 730 m long main span and two high-rise towers over 200 m in height was selected for this study. The preliminary results show that compared with piers, the tower is more vulnerable to pulse-like earthquakes, and it may develop plasticity at certain locations. In addition, viscous dampers may not have the same effect during pulse-like earthquakes as they do under site-specific earthquakes. Hence, reoptimization of damper parameters or reconsideration of other energy dissipation devices will be needed if strong earthquakes are likely to occur.

Keywords

high-rise tower / cable-stayed bridge / strong earthquake / seismic design

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Acknowledgments

This research is supported by the National Science Foundation of China (Grant No. 51008225) and by the Scientific Research Foundation for the Returned Overseas Chinese Scholars of the State Education Ministry in China.

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg