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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 5: Dynamics and Earthquake Engineering

Research on analysis of large space structure under multi-support seismic excitation

< Table of Contents for General 5: Dynamics and Earthquake Engineering
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 5: Dynamics and Earthquake Engineering
  • Title: Research on analysis of large space structure under multi-support seismic excitation
  • Author(s): Feng LIU, JiHong QIAN, PengFei ZHAO
  • Keywords: large space structure, seismic analysis, multi-support excitation, traveling wave effect, apparent wave velocity, big-mass method
Abstract
According to ‘Chinese code for seismic design of buildings (GB50011-2010)’, seismic analysis under multisupport excitation should be done to structure with large dimension. First, the article introduces the characteristics of three main methods used for multi-support seismic analysis in which time-history method is recommended by the code for its practicability in the design of the projects. In confirming the multi-support earthquake wave, the traveling wave effect and local site effect are two crucial factors whose consideration methods are given in the article. Generally, there are two methods to make multi-support excitation analysis in finite element software, one is exerting compulsory boundary condition, and the other is big-mass method. These two methods above will get the consistent result under the same assumption, while they have different application scope which is summed up in the article. The article suggests taking the overload element and overload ratio as the index to evaluate the influence of multi-support seismic analysis. Then, the article introduces the multi-support seismic analysis of some practical projects. Some common conclusions are summarized based on the analysis experience of these projects.

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