This paper studies the dynamic analysis method of pier safety based on time-frequency domain, aiming to provide an effective means to evaluate the safety performance of pier under dynamic load. Firstly, the accelerometer is used to arrange measuring points at different parts of the pier to obtain the dynamic time history data of each part. In the data preprocessing stage, the methods of baseline correction and band-pass filtering are used to process the acceleration time history data. Baseline correction eliminates long-term drift in the data, while bandpass filtering helps remove noise and interference, improving the signal-to-noise ratio of the data. Then, the displacement time history data of different measuring points are calculated by digital integration method. At the same time, the acceleration response spectrum of each measuring point is calculated by the response spectrum method to reveal the response characteristics of the pier under different frequency dynamic loads. In order to evaluate the safety of pier, Pearson correlation coefficient method is used to calculate the difference of displacement time history data and acceleration response spectrum at different measuring points. By comparing the correlation between different measuring points, a bridge pier safety evaluation coefficient is constructed to evaluate the safety performance of bridge pier quantitatively. In order to verify the feasibility and effectiveness of the proposed method, a numerical simulation model is also established for case calculation. By simulating the response of pier under specific dynamic load and comparing, the applicability of this method in dynamic analysis of pier safety are proved.

Jiejun Ning, Chaodong Yang, Qifeng Chen. Research on dynamic analysis method of pier safety based on time-frequency domain combination. Academic Journal of Engineering and Technology Science (2024) Vol. 7, Issue 6: 138-144. https://doi.org/10.25236/AJETS.2024.070620.

[1] Zhang K ,Zhang M ,Long X , et al. Damage progression of offshore-corroded round-ended piers under long-term solar radiation and ambient temperature cycles [J]. Engineering Failure Analysis, 2025, 168 109067-109067. 

[2] Max S, Ioannis A . Seismic Performance of a Rocking Pile Group Supporting a Bridge Pier [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2025, 151 (1): 

[3] Dubuit J ,Bertron A ,Laurens S , et al. Biogalvanic cathodic protection applied to a large-scale laboratory pilot concrete pier: Influence of the bioanodic surface, tidal variations and temperature [J]. Journal of Building Engineering, 2024, 98 111125-111125. 

[4] Zhang Q ,Zhang X ,Zhou S , et al. Effect and evaluation model of adjacent pile construction on high-speed railway piers in soft soils [J]. Structures, 2024, 70 107687-107687. 

[5] Chu Y ,Xia H ,Zhang H , et al. Dynamic response analysis of the new layered assembled lattice piers under lateral impact [J]. Structures, 2024, 70 107801-107801. 

[6] Yu A ,Gu Y ,Lai X , et al. Experimental study on tsunami impact on offshore box-girder bridges [J]. Ocean Engineering, 2024, 314 (P2): 119749-119749. 

[7] Yun G ,Liu C . Study on the Hydrodynamic Effects of Bridge Piers Under Velocity-Type Pulse Ground Motion Based on Different Characteristic Periods [J]. Applied Sciences, 2024, 14 (22): 10709-10709. 

[8] Chen S ,Ma S ,Ma W . Seismic performance study of plastic hinge region using PVA-ECC composite bridge piers [J]. Engineering Structures, 2025, 323 (PA): 119261-119261. 

[9] Yimer A M ,Dey T . Dynamic behavior of full-scale GFRP bar-reinforced ultra-high-performance concrete-encased concrete-filled double-skin steel tubular bridge columns under lateral impact loading [J]. Structures, 2024, 70 107674-107674. 

[10] He H, Zhou J ,Xu L , et al. Optimization of a novel lateral energy dissipation system for cable-stayed bridge with short piers based on seismic vulnerability analysis [J]. Structures, 2024, 70 107700-107700.