Numerical aspects of coupling strongly frequency-dependent soil-foundation models with structural finite elements in the time-domain

被引：31
|
作者：
Cazzani, Antonio [1 ]
Ruge, Peter [1 ,2 ]
机构：
[1] Univ Cagliari, DISIG Dept Struct Infrastruct & Geomat Engn, I-09123 Cagliari, Italy
[2] Tech Univ Dresden, Inst Stat & Dynam Tragwerke, D-01062 Dresden, Germany
来源：
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2012年 / 37卷
关键词：
BOUNDARY-CONDITIONS; UNBOUNDED-DOMAINS;
D O I：
10.1016/j.soildyn.2012.01.011
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
In the literature relevant to soil-foundation-structure interaction problems a lot of results for the dynamic stiffness in the interface between the soil-foundation part and the structure have been published. However, in order to deal with transient excitations, a transformation into the time-domain is necessary. This contribution uses a well-described Fade-like rational representation, but adds some improvements concerning robustness, optimized treatment of spurious modes and numerical effectiveness. The benefits of the new findings are demonstrated by means of a typical application from foundation-engineering: very well prepared dynamic stiffness coefficients for groups of piles are used in order to treat transient excitations caused by an unbalanced rotor during running-up. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：56 / 72
页数：17
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