Abstract
To study the seismic performance of prefabricated single-segment steel jacket piers connected by grouting sleeves, two scaled symmetrical pier models with different anchorage lengths of the longitudinal reinforcement in the grouting sleeves and a comparative symmetrical cast-in-place (CIP) model were designed. OpenSees finite element models were established and shaking table tests were carried out on the three scaled pier models. The seismic response of each pier was compared and analyzed. Results showed the stiffness of the two prefabricated piers was greater than that of the CIP pier, and other seismic responses were less than those of the CIP piers, The dynamic responses of the two prefabricated bridge models were similar and changing the anchorage length of the reinforcement in the grouting sleeve had little effect on the seismic performance of the prefabricated pier. The simulation results were in good agreement with the experimental results. In the parameter analysis, the counterweight of the pier top had the greatest influence on the seismic performance of the prefabricated pier. The anchorage length of the longitudinal reinforcement in the grouting sleeve could be 6–14 times the diameter of the longitudinal reinforcement. Moreover, the seismic performance was found to be optimal when the thickness of the steel jacket was 5–7 mm.
Highlights
Guo et al [22] conducted a shaking table test analysis of piers connected by grouting sleeves under high-intensity earthquake conditions, and the results revealed that the seismic performance of the prefabricated piers connected by grouting sleeves was better than that of CIP piers
Tostudy studythe theseismic seismicperformance performanceof ofprefabricated prefabricatedsingle-segment single-segmentsteel steeljacket jacketbridge bridge piers, two prefabricated single-segment steel jacket piers with different anchorage piers, two prefabricated single-segment steel jacket piers with different anchoragelengths lengths of of the thereinforcement reinforcement steel steelbars barsin inthe thegrouting groutingsleeves sleeveswere weredesigned, designed,and andaacomparison comparison was made with a corresponding
Shaking table tests and finite element simulations was made with a corresponding CIP pier
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Conducted a pseudo-static test on prefabricated bridge piers installed with grouting sleeves in the plastic hinge areas and caps, respectively, and the test results showed that the former was more stable after reinforcement yielding, while the latter had better durability after reinforcement yielding. There currently exist few research results on the effects of the anchorage length of the reinforcement in the grouting sleeve and the steel jacket on the seismic performance of prefabricated piers, and previous research has mainly adopted pseudo-static tests as the experimental method. According to the same set of tests [25], it has been proved that the prefabricated singlesegment bridge pier connected with a grouting sleeve has better seismic performance than the CIP bridge pier. In order to better improve the seismic response of single-segment prefabricated pier, steel jackets were installed in the plastic hinge area of the pier bottom bridge. Shaking table tests were carried out to study the effects of different anchorage lengths on the seismic performance of the new structure
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