Simplified methods for efficient seismic design and analysis of water-surrounded composite axisymmetric structures
Simplified methods for efficient seismic design and analysis of water-surrounded composite axisymmetric structures
复制标题
水围复合轴对称结构高效抗震设计和分析的简化方法
DOI：
10.1016/j.oceaneng.2015.05.001
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发表时间：
2015
影响因子：
5
通讯作者：
Wancheng Yuan
中科院分区：
文献类型：
--
作者：
Kai Wei;Najib Bouaanani;Wancheng Yuan
用于轴对称结构地震分析的可用简化公式解决了具有均匀横截面的材料均匀固体问题，同时通常忽略了较高振动模式和土壤柔韧性的影响。在本文中，我们开发了原始的简化程序，消除了与水接触振动的轴对称结构的实际抗震设计和安全评估的这些限制。所提出的程序考虑了较高的振动模式、水压缩性和结构底层基础的灵活性。出于实际目的，首先推导公式时忽略表面重力波的影响，然后在需要时进行扩展以考虑这些影响。涵盖不同材料制成的复合轴对称结构以及因内墙几何不规则而产生不均匀空心截面的结构。提供了分步流程图，以便在日常实际工程环境中轻松实现计算。通过具有刚性和柔性基础的均质和复合轴对称塔水系统的例子说明了所提出技术的应用。所获得的结果已成功针对先进的耦合流体-结构有限元解决方案进行了验证。
Available simplified formulations for the seismic analysis of axisymmetric structures address materially homogeneous solids with uniform cross-sections, while generally neglecting the effects of higher vibration modes and soil flexibility. In this paper, we develop original simplified procedures that remove these restrictions for practical seismic design and safety evaluation of axisymmetric structures vibrating in contact with water. The procedures proposed take account of higher vibration modes, water compressibility and flexibility of underlying foundation of the structure. For practical purposes, the formulations are first derived while neglecting the effects of surface gravity waves, and are then extended to account for these effects when required. Composite axisymmetric structures made of different materials as well as those with non-uniform hollow cross-sections due to geometric irregularity of interior wall are covered. Step-by-step flowcharts are provided so that the calculations can be easily implemented in a daily practical engineering environment. Application of the proposed techniques is illustrated through the examples of homogeneous and composite axisymmetric tower–water systems with rigid and flexible foundations. The obtained results are successfully validated against advanced coupled fluid–structure finite element solutions.