Experimental Study on the Seismic Performance of Socket Bridge Piers

Abstract

In order to accelerate the construction of bridge substructure, a socket joint construction that does not require interfaces roughening between the precast columns and the reserved cavity of the precast foundation is raised in this paper. The seismic performance of such fabricated bridge piers was investigated by carrying quasistatic tests on socket circular pier specimens of different embedment depths with a compared cast-in-place pier specimen. The experimental results showed that the prefabricated piers with the embedment length larger than 1.0 times the column diameter, featuring smooth interfaces that was free of roughening, had a failure mode of bending damage as well as the cast-in-place component. As the embedment depth increases, the seismic performance indexes of the socket bridge pier, including bearing capacity, ductility, and energy dissipation capacity, are improved. The seismic performance indexes of a socket bridge pier specimen with an embedment depth of 1.5 times the column’s diameter in the test are better than the cast-in-place one.

Research on the Factors Influencing the Seismic Performance of Grouting Sleeve Assembled Double-Column Piers

“…When the depth of burial is equal to double the diameter of the columns, socket pier bearing capacity and cast-in-place piers are the same, but the energy-consuming capacity and displacement ductility are not as good as the cast-in-place piers. When the burial depth is one and a half times the diameter of the columns, the socket pier bearing capacity, energy consumption capacity, and ductility are better than cast-in-place piers [24]. When prefabricated assembled piers use the grouting sleeve connection, their seismic performance is determined by the location of the grouting sleeve, grout strength, grouting sleeve length, and other factors.…”

Análise numérica de cálice de fundação em bloco sobre duas estacas

“…O desempenho sísmico de pilares pré-moldados ligados à fundação por meio de cálice liso embutido foi estudo por Han, Dong e Wang (2020). Os autores realizaram ensaios experimentais dinâmicos em três modelos pré-moldados, variando o comprimento de embutimento ℓ emb em 0,5D, 1,0D, 1,5D (sendo D o diâmetro da coluna), e em um modelo monolítico, para fins de comparação.…”