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Indexed by:期刊论文

Date of Publication:2018-10-01

Journal:JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES

Included Journals:SCIE

Volume:32

Issue:5

ISSN No.:0887-3828

Key Words:Cable-stayed bridge; Monitoring-based analysis; Structural temperature; Quasi-static deflection; Correlation-based estimation

Abstract:Thermal actions have a great influence on the girder deflection variability of long-span cable-stayed bridges. The main objective of this study is to investigate the variability of the bridge girder deflection under thermal actions. A monitoring-based analysis of thermal actions and temperature-induced bridge girder deflection for a combined highway and railway cable-stayed bridge has been carried out; the correlation between the girder deflections at different positions is analyzed; a detailed analysis on the correlation between the structural temperature and the girder deflections has also been performed. Furthermore, the double thresholds with a specific probability for the deflection estimates are proposed. It is revealed that a strong linear relationship exists between the structural temperature and girder deflections. The proposed method can provide good estimates of the bridge girder deflections based on long-term monitoring temperature data.