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Abstract
High-rise buildings are susceptible to wind-induced displacements, which can be precisely monitored by using GPS technology. However, GPS monitoring applications may be subject to signal interference and high hardware costs. This study presents a new wind-induced vibration monitoring approach that is based on the mixed use of high-rate and low-rate GPS receivers. In the proposed approach, high-rate receivers are only required in the monitoring stations, where we apply time-differenced positioning to obtain position changes between adjacent epochs. The derived high-rate monitoring station position changes are then integrated with low-rate single epoch relative positioning results between the monitoring and reference stations. Experimental results with both simulated and real data show that the proposed method has a comparable performance with the traditional relative positioning approach, in terms of determining buildings’ vibration frequency, displacement, and acceleration.
Highlights
Under influences such as operating load, strong wind, and earthquake, high-rise buildings normally experience vibrations and quasi-static deformations [1,2,3,4]
The single-epoch relative positioning method effectively eliminates spatial-correlated errors can provide high-accuracy positioning results. This method requires high-performance and high-rate GPS receivers at both the monitoring and reference stations, which will increase the cost of engineering application
This paper analyzes the results in the three aspects: identifying the modal parameters of tall buildings, observation of building vibration displacement, and the extraction of quasi-static deformation
Summary
Under influences such as operating load, strong wind, and earthquake, high-rise buildings normally experience vibrations and quasi-static deformations [1,2,3,4]. There are three major GPS positioning methods for monitoring the wind-induced responses of high-rise buildings, namely, single-epoch relative positioning method [10,11], real-time kinematic (RTK) method [12,13,14,15,16,17,18], and Precise Point Positioning (PPP) method [19,20,21,22,23]. The single-epoch relative positioning method effectively eliminates spatial-correlated errors can provide high-accuracy positioning results This method requires high-performance and high-rate GPS receivers at both the monitoring and reference stations, which will increase the cost of engineering application.
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