Seismic performances of prefabricated assembled piers connected with corrugated pipes in high intensity seismic areas

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (2) : 123-137.

LIU Bin1，HUANG Yongfu1，SONG Yanchen2，HAN Qiang2，BAI Hongtao1，DING Kai1

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Abstract

In order to investigate the feasibility of prefabricated assembled piers in high-intensity areas, a new pier-cap joint connected by the inner and outer corrugated pipes is proposed. Two specimens with a scale ratio of 1:3 were designed and fabricated as the internal and external corrugated pipe-connected pier (IOCPCP) and cast-in-place pier (CIP), respectively. By using the method of quasi-static test and finite element numerical simulation, the hysteretic performance, energy dissipation capacity, and curvature of the specimen are analyzed, as well as the failure mode. The test results show that the specimens are all damaged in the plastic hinge zone at the bottom of the pier; the IOCPCP specimen is similar to the CIP in bearing capacity, hysteresis, and energy dissipation, and has better ductility; the IOCPCP specimen can still maintain the bearing capacity of more than 88% of the peak load under the drift ratio of 6%. The parameter analysis accounting for the strength of the longitudinal reinforcement and the length of the internal compensation reinforcement of the pier column was carried out It is considered that the increase in the strength of the pier column longitudinal reinforcement can slightly reduce the plastic hinge area at the bottom of the pier, but requires higher strength of the grout in the peripheral corrugated pipes; when the length of the internal compensation reinforcement is short, double plastic hinges are prone to occur. The test results can provide a reference for the engineering application of prefabricated assembled piers in high-intensity areas.

Key words

bridge engineering / precast bridge pier / quasi-static test / corrugated pipe connection / high-intensity area / seismic performance

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LIU Bin1，HUANG Yongfu1，SONG Yanchen2，HAN Qiang2，BAI Hongtao1，DING Kai1. Seismic performances of prefabricated assembled piers connected with corrugated pipes in high intensity seismic areas[J]. Journal of Vibration and Shock, 2024, 43(2): 123-137

References

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