大跨度钢箱梁悬索桥温度所致结构静力响应

Translated title of the contribution: Temperature-induced structural static responses of a long-span steel box girder suspension bridge

Lin ren Zhou, Lan Chen, Yong Xia, Ki Young Koo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Temperature is a significant load on bridges, particularly for long-span steel box girder bridges. This study investigates the temperature-induced static responses of a long-span suspension bridge under real service environmental conditions using numerical simulations and field measurements. Detailed 2D finite element (FE) models of a typical section for the box girder, main cable, hanger, tower column, and crossbeam are constructed. The thermal boundary conditions are determined strictly according to the surrounding environments of a typical sunny day and applied to the FE models. A transient heat-transfer analysis is performed and the time-dependent temperature and its distribution on the bridge are obtained. In addition, a fine, 3D FE model of the bridge is developed for a structural analysis. The calculated temperatures are applied to the 3D model and the temperature-induced structural responses are simulated. The simulated temperatures and the associated static responses have good agreement with the measured counterparts and support the numerical simulation method. The main cable and bridge deck make the greatest contributions to the temperature effects on the suspension bridge. The static responses of bridge caused by the design vehicle load are also calculated. The daily variation of the temperature-induced static responses is comparable with, even higher than, that of the design vehicle load.

Translated title of the contributionTemperature-induced structural static responses of a long-span steel box girder suspension bridge
Original languageChinese
Pages (from-to)580-592
Number of pages13
JournalJournal of Zhejiang University: Science A
Volume21
Issue number7
DOIs
Publication statusPublished - 1 Jul 2020

Keywords

  • Field monitoring
  • Long-span suspension bridge
  • Static response
  • Temperature effect
  • TU311.4
  • U448.25
  • Vehicle load

ASJC Scopus subject areas

  • Engineering(all)

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