Soil-High-Rise Building Group Dynamic Interaction Considering Site Effect

Abstract:

This article reports a sub-domain method to analyze the dynamic interaction of soil-high-rise building group considering sit effect, which is the extension of the domain reduction method proposed by Bielak and his coworkers in the framework of the finite-element method, originally for building–soil–foundation interaction problems. The whole domain with high-rise building group is divided into two interrelated sub-domains, the external domain and the internal one. And the method contains two steps. In addition, the effect of the external domain to the internal domain is expressed by the equivalent forces which are put on the nodes of the interface between the two sub-domains in the second step. The formation of the equivalent force is attained according to the equation of motion. In the first step the free-field ground motion is calculated under the bedrock wave excitation, and all the nodal displacements are stored. Then the equivalent forces are calculated according the data in the first step, using the formulation of the equivalent force. In the second step a finite element analysis model of the sub-domain containing the internal domain and the high-rise building group is established, and the equivalent forces are put on the nodes of the interface. Later the seismic response of soil-high-rise building group can be calculated.

• Periodical: Advanced Materials Research (Volume 683)
• Pages: 903-908
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.683.903
• Online since: April 2013
• Authors: Qi Ge, Feng Xiong, Qun Yi Huang
• Keywords: Equivalent Force, High-Rise Building Group, Sit Effect, Sub-Domain

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