薛素铎, 刘毅, 李雄彦. 协同工作条件下地基土对单层球面网壳结构动力性能的影响[J]. 工程力学, 2014, 31(9): 133-141. DOI: 10.6052/j.issn.1000-4750.2013.04.0280
引用本文: 薛素铎, 刘毅, 李雄彦. 协同工作条件下地基土对单层球面网壳结构动力性能的影响[J]. 工程力学, 2014, 31(9): 133-141. DOI: 10.6052/j.issn.1000-4750.2013.04.0280
XUE Su-duo, LIU Yi, LI Xiong-yan. ANALYSIS OF FOUNDATION SOIL EFFECT ON DYNAMIC PERFORMANCE OF SINGLE-LAYER SPHERICAL LATTICED SHELL UNDER COOPERATIVE WORK[J]. Engineering Mechanics, 2014, 31(9): 133-141. DOI: 10.6052/j.issn.1000-4750.2013.04.0280
Citation: XUE Su-duo, LIU Yi, LI Xiong-yan. ANALYSIS OF FOUNDATION SOIL EFFECT ON DYNAMIC PERFORMANCE OF SINGLE-LAYER SPHERICAL LATTICED SHELL UNDER COOPERATIVE WORK[J]. Engineering Mechanics, 2014, 31(9): 133-141. DOI: 10.6052/j.issn.1000-4750.2013.04.0280

协同工作条件下地基土对单层球面网壳结构动力性能的影响

ANALYSIS OF FOUNDATION SOIL EFFECT ON DYNAMIC PERFORMANCE OF SINGLE-LAYER SPHERICAL LATTICED SHELL UNDER COOPERATIVE WORK

  • 摘要: 针对大跨空间结构与地基土协同工作问题,基于修正的S-R(Sway-Rocking)模型,建立单层球面网壳屋盖-支承结构-地基土协同工作的整体有限元模型,分析协同工作条件下不同地基土对单层球面网壳结构自振特性及地震响应的影响。研究表明,协同工作条件下单层球面网壳结构的自振周期随着地基土的变软明显增大,屋盖结构竖向振型提前。在地震作用下,单层球面网壳屋盖的杆件轴力和网壳节点最大竖向加速度随着地基土变软而减小;网壳节点的最大水平位移随着地基土的变软而增大,而最大竖向位移呈现减小趋势。

     

    Abstract: In order to make a comprehensive analysis of the effects of different foundation soil on the natural vibration characteristics and seismic responses of a single-layer spherical latticed shell, the analysis is made on an integral model based on a modified S-R (Sway-Rocking) model. The integral model consists of a single-layer spherical latticed shell, a support structure and its foundation soil. The numerical results show that the nature periods of the single-layer latticed spherical shell increase obviously and the vertical mode shapes appear earlier with foundation soil becoming soft when the cooperative work between the foundation soil and the superstructure is considered. The member axial forces and the maximal vertical acceleration of nodes decrease significantly with the foundation soil becoming soft under an earthquake action. Furthermore, the maximal horizontal displacement of nodes increases gradually with the foundation soil becoming soft, while the maximal vertical displacement decreases.

     

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