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

Seismic design of high-rise towers for cable-stayed bridges under strong earthquakes
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强震作用下斜拉桥高层塔抗震设计

DOI:
10.1007/s11709-011-0127-5
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发表时间:
2011-11
影响因子:
3
通讯作者:
徐艳
徐艳
中科院分区:
工程技术2区
文献类型:
--
作者:
徐艳

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本文介绍了强震下斜拉桥高层塔抗震设计系列研究中的第一篇。本研究选取一座主跨长730 m的实用斜拉桥和两座高度超过200 m的高层塔进行研究。初步结果表明,与桥墩相比,塔楼更容易受到脉冲式地震的影响,并且在某些位置可能会产生塑性。此外,粘性阻尼器在脉冲类地震中可能不会产生与在特定地点地震中相同的效果。因此,如果可能发生强地震,则需要重新优化阻尼器参数或重新考虑其他消能装置。
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.
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