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首页> 外文期刊>Journal of bridge engineering >Seismic Analysis of Long-Span Cable-Stayed Bridges by an Integrated Finite Strip Method
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Seismic Analysis of Long-Span Cable-Stayed Bridges by an Integrated Finite Strip Method

机译：大跨度斜拉桥地震分析的综合有限条法

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摘要

This paper provides a very efficient, integrated framework for seismic analyses of long-span cable-stayed bridges. The efficiency comes from the dramatic reduction in formation time and the degrees of freedom (DOF) associated with the structure, using the integrated finite strip method (IFSM) along with the application of a very robust and efficient time history method (THM) using the Newmark scheme for dynamic analysis of the bridge structure. The previous versions of the finite strip method are limited to modeling the bridge deck only, whereas other structural components are replaced by assumed boundary conditions. Using the IFSM, all components of the long-span cable-stayed bridge can be modeled in a unified system, and consequently, the real dynamic behavior including the interactions between deck, piers, and cables can be perfectly considered. To verify the solution, the geometric and dynamic properties of the Kap Shui Mun (KSM) Bridge, as a real example of a long-span cable-stayed bridge, are derived by the proposed finite strip method. Then, the seismic response of KSM Bridge under uniform and nonuniform earthquake loadings is investigated by using the THM. The results show that the IFSM can be applied successfully for seismic analysis of long-span cable-stayed bridges, and the analysis can be performed in a minimal amount of time.
机译：本文为大跨度斜拉桥的地震分析提供了一个非常有效的集成框架。效率来自使用集成有限带方法（IFSM）显着减少了形成时间和与结构相关的自由度（DOF），以及使用了非常健壮和高效的时程方法（THM）的应用。用于桥梁结构动力分析的Newmark方案。有限条方法的早期版本仅限于对桥面建模，而其他结构部件则由假定的边界条件代替。使用IFSM，可以在统一的系统中对大跨度斜拉桥的所有组件进行建模，因此，可以完美地考虑包括甲板，桥墩和电缆之间相互作用在内的实际动态行为。为了验证该解决方案，通过提出的有限条带方法推导了Kap Shui Mun（KSM）桥的几何和动力特性，作为大跨度斜拉桥的一个实际示例。然后，利用THM研究了KSM桥在均匀和非均匀地震荷载下的地震响应。结果表明，IFSM可以成功地用于大跨度斜拉桥的地震分析，并且可以在最短的时间内完成分析。

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