An improved approach for multiple support response spectral analysis of a long-span high-pier railway bridge

Lanping Li, Yizhi Bu, Hongyu Jia, Shixiong Zheng, Deyi Zhang, Kaiming Bi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

To overcome the difficulty of performing multi-point response spectrum analysis for engineering structures under spatially varying ground motions (SVGM) using the general finite element code such as ANSYS, an approach has been developed by improving the modelling of the input ground motions in the spectral analysis. Based on the stochastic vibration analyses, the cross-power spectral density (c-PSD) matrix is adopted to model the stationary SVGM. The design response spectra are converted into the corresponding PSD model with appropriate coherency functions and apparent wave velocities. Then elements of c-PSD matrix are summarized in the row and the PSD matrix is transformed into the response spectra for a general spectral analysis. A long-span high-pier bridge under multiple support excitations is analyzed using the proposed approach considering the incoherence, wave-passage and site-response effects. The proposed approach is deemed to be an efficient numerical method that can be used for seismic analysis of large engineering structures under SVGM.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalEarthquake and Structures
Volume13
Issue number2
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • High-pier railway bridge
  • Multiple support excitation
  • Response spectral analysis
  • Seismic spatial variability
  • Stochastic vibration analysis

ASJC Scopus subject areas

  • Civil and Structural Engineering

Fingerprint

Dive into the research topics of 'An improved approach for multiple support response spectral analysis of a long-span high-pier railway bridge'. Together they form a unique fingerprint.

Cite this