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<p>The connectivity between interfaces is crucial in determining the seismic performance of precast piers with sleeve connections. This paper first used tie, cohesive, and friction connections to simulate the interface of three different precast piers and verified the connection accuracy by comparing the test results. Thereafter, pushover analysis was performed to determine the pier bottom shear force and pier top displacement of different precast piers. The seismic performance points of different precast piers were determined using the modified acceleration–displacement response spectrum (MADRS) method, according to the specific demand spectra. Moreover, the seismic performances of several piers were compared. Finally, the ground motion time history analysis was compared with the MADRS method. The results revealed that the use of a cohesive connection provides a more accurate representation of the interface failure between the pier and the foundation. The F-Δ curve demonstrated that the sleeve position and external steel plate can increase the effective stiffness of the section, and they greatly influenced the seismic performance. The MADRS results revealed that the external-steel-plate pier possesses the best seismic performance, with a pier top displacement of 7.4&#xa0;mm. The seismic performance of the sleeve-placed-in-pier pier ranked second at 8.91&#xa0;mm. It was followed by the sleeve-placed-in-foundation pier with 9.76&#xa0;mm. Moreover, the cast-in-place pier had the highest displacement of 9.95&#xa0;mm. Comparing the time history analyses revealed that the MADRS method can accurately and effectively analyze the seismic performance of sleeve-connected precast pier.</p>

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Seismic Performance Analysis of Sleeve-Connected Precast Piers Based on Cohesive Connection

  • 期刊论文

  • 发表日期：

    2025年4月18日

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  • Chaofan Wang,
  • Yanmin Jia,
  • Xue Zhao,
  • Xiaopeng Han

摘要

The connectivity between interfaces is crucial in determining the seismic performance of precast piers with sleeve connections. This paper first used tie, cohesive, and friction connections to simulate the interface of three different precast piers and verified the connection accuracy by comparing the test results. Thereafter, pushover analysis was performed to determine the pier bottom shear force and pier top displacement of different precast piers. The seismic performance points of different precast piers were determined using the modified acceleration–displacement response spectrum (MADRS) method, according to the specific demand spectra. Moreover, the seismic performances of several piers were compared. Finally, the ground motion time history analysis was compared with the MADRS method. The results revealed that the use of a cohesive connection provides a more accurate representation of the interface failure between the pier and the foundation. The F-Δ curve demonstrated that the sleeve position and external steel plate can increase the effective stiffness of the section, and they greatly influenced the seismic performance. The MADRS results revealed that the external-steel-plate pier possesses the best seismic performance, with a pier top displacement of 7.4 mm. The seismic performance of the sleeve-placed-in-pier pier ranked second at 8.91 mm. It was followed by the sleeve-placed-in-foundation pier with 9.76 mm. Moreover, the cast-in-place pier had the highest displacement of 9.95 mm. Comparing the time history analyses revealed that the MADRS method can accurately and effectively analyze the seismic performance of sleeve-connected precast pier.