An Emulative Precast Segmental Concrete Bridge Column for Seismic Regions

Abstract

This work proposes a new precast segmental concrete bridge column. The lower region of the column is built using cast-in-place (CIP) construction. The height of the CIP region and level of post-tensioning force in the precast region are selected such that the ultimate condition of the column under seismic loading is governed by a conventional plastic hinge mechanism in the CIP region. A tall column was constructed and subjected to cyclic loading. Test results indicate that the column has excellent ductility and energy dissipation. A pushover analytical method was proposed and applied to the proposed column. This method captured joint opening through the joint rotation length and the amount of curvature exceeding the cracking curvature. Analytical results agree well with test results in predicting the envelope of hysteretic behavior, the increase in axial force in the precast region, and the contribution of precast and CIP regions to column displacement.

Experimental test and seismic performance of partial precast concrete segmental bridge column with cast-in-place base

“…As similar to the research performed by Ou et al [18], the CIP method is adopted here for the bottom of the column. However, the height of the CIP region is decided based on the calculation of potential plastic hinge length.…”

“…Recently, a new technique has been developed to increase the energy dissipation capacity of segmental columns, consisting of a combination of cast-in-place and precast methods proposed by Ou et al [18]. The lower part of the column has cast-in-place (CIP) reinforced concrete while the upper part consists of eight precast hollow segments.…”

Analytical Study of Force–Displacement Behavior and Ductility of Self-centering Segmental Concrete Columns

“…While UPTSCs are capable of withstanding large nonlinear displacement, due to their low level of damage under seismic excitation, they experience large displacements. To tackle this drawback, different approaches have been developed to increase the energy dissipation capacity of the rocking columns, including the use of metallic yielding components Ou et al 2009Ou et al , 2010, shape memory alloy bars (Roh and Reinhorn 2010;Roh et al 2012), external energy dissipating dampers (Palermo et al 2007) and columns with cast-in-place (emulative) base Ou et al 2013). To improve the behavior self-centering precast members the effect of using confinement jackets (Motaref et al 2013;Hewes and Priestley 2002), fiber-reinforced concrete (Shajil et al 2016), and rubber or elastomeric bearing pads (ElGawady 2011; Motaref et al 2010) have also been investigated.…”

Experimental Campaign of a Low-Cost and Replaceable System for Passive Energy Dissipation in Precast Concrete Structures

“…This type of test characterizes the ductility of the structure, as well as analyzes very specific regions (connections between elements, singular construction details, etc.) [14][15][16][17][18][19][20][21].Second, there are pseudo-dynamic tests that are a special type of quasi-static test in which displacements are introduced at some points in the structure. The difference is that these displacements are not known before the test and are calculated during the test using a step-by-step integration software.…”

“…This type of test characterizes the ductility of the structure, as well as analyzes very specific regions (connections between elements, singular construction details, etc.) [14][15][16][17][18][19][20][21].…”