Dynamic Deformation Monitoring and Analysis for Long-span Bridges in Operation Based on GPS/BDS Observations

doi:10.13474/j.cnki.11-2246.2018.0326

Abstract

Abstract: The damage detection and safety monitoring of long-span bridges has become more complicated than normal bridges as their span lengths are getting even longer these years. The creep deformation of long-span bridges in operation is usually a process of slow change with relatively small amplitudes. Due to the limit of its inherent positioning capability, the GNSS-RTK technique does not completely meet the precision demand of long-span bridge deformation monitoring. Thus, this paper has explored the feasibility of the continuous pseudo-static monitoring mode based on GPS/BDS observations. An experiment on Sutong cable-stayed bridge was conducted to testify its effectivity with such processing modes as GPS only, BDS only and GPS/BDS combined. The results show that the proposed monitoring mode is highly applicable to precise monitoring of short-termdynamic deformation and analysis of their structure change trends of long-span bridges, which can also be operated automatically.

Key words: dynamic deformation monitoring, long-span bridges, GPS, BDS, continuous pseudo-static processing

CLC Number:

P258

LIU Zhiqiang, YUE Dongjie, ZHENG Dehua. Dynamic Deformation Monitoring and Analysis for Long-span Bridges in Operation Based on GPS/BDS Observations[J]. 测绘通报, 2018, 0(10): 107-112.

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