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

doi:10.1007/s11709-011-0127-5

Front Arch Civil Eng Chin

2011, Vol. 5

Issue (4) : 451-457 https://doi.org/10.1007/s11709-011-0127-5

RESEARCH ARTICLE

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

Yan XU(

), Shide HU

State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China

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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

Corresponding Author(s): XU Yan,Email:yanxu@tongji.edu.cn

Issue Date: 05 December 2011

Cite this article:

Yan XU,Shide HU. Seismic design of high-rise towers for cable-stayed bridges under strong earthquakes[J]. Front Arch Civil Eng Chin, 2011, 5(4): 451-457.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-011-0127-5
https://academic.hep.com.cn/fsce/EN/Y2011/V5/I4/451

Fig.1 Picture of the high-rise towers

Fig.2 General layout of the bridge

Fig.3 Tower elevation and sections

Fig.4 FEM Bridge model

Tab.1 Boundary conditions

Fig.5 Acceleration response spectrum

Tab.2 Seismic responses

Fig.6 Time histories of the Rinaldi record

Fig.7 Displacement time histories of the tower top

Tab.3 Seismic responses

Fig.8 Damping hysteretic loops

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