风-土-结构相互作用对高层建筑纵向响应的影响

Sorush Niknamian
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引用次数: 1

摘要

在这项工作中,利用ABAQUS程序对CAARC(英联邦咨询航空委员会)标准高层建筑的风影响进行了数值模拟,该建筑位于地面铺展基础上。风在大气边界层中以指数方式表现出来。然后,采用ILES技术对流湍流进行建模,并采用共同模拟的方法来交换流体与结构节点之间的非均匀载荷。结构的阻尼采用瑞利策略控制。采用直接策略对地基-土框架的力学反应进行了建模。为模拟自由边界,在数值模型中加入了无限边界条件,并考虑了地下构件间滑动和分离的合理接触单元。最后,将流体溶液和结构反应与实验估计的均值和均方根在广泛的减速范围内进行了比较。将土-结构体系框架的数值计算结果与不考虑土-结构相互作用的基础条件进行了比较。结果表明,建筑物的动力特性和反作用力会影响土-结构相互作用,因此规划人员应充分考虑这些参数,以保证实际设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Effect of Wind-Soil-Structure Interaction on the Longitudinal Response of High-Rise Buildings
In this work, the modelling of the wind impact on the standard tall building of CAARC (Commonwealth Advisory Aeronautical Council), which is placed on a surface spread footing, is done numerically utilizing the ABAQUS program. The wind is demonstrated as an exponential way in the boundary layer of the atmosphere. Then, stream turbulence is modeled by the ILES technique and a cosimulation is accepted to exchange non-uniform loads from fluid to structural nodes. Damping of the structure is controlled by the Rayleigh strategy. Mechanical reaction of the footing-soil framework is modeled utilizing direct strategy. Infinite boundary conditions have been added to the numerical model for the simulation of free boundaries, and reasonable contact elements for sliding and separating between subsurface components are considered. Finally, fluid solutions and structural reactions are compared with the mean and root mean squares of experimental estimations on an extensive range of reduced speeds. Numerical results for the framework of soil-structure systems were compared with base conditions without association of soil-structure interaction. It is concluded that dynamic properties and reactions of the building influence soil-structure interaction and accordingly the planners should consider these parameters keeping in mind to guarantee the practical designing.
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