Seismic Design Method for Reinforced Concrete Two-Way Column Hinges

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Title: Seismic Design Method for Reinforced Concrete Two-Way Column Hinges

Author(s): Zhi-Yuan Cheng, M. Saiid Saiidi, and David Sanders

Publication: Structural Journal

Volume: 107

Issue: 5

Appears on pages(s): 572-579

Keywords: dowel action; lateral loading; plastic hinge length; reinforced concrete; seismic loads; shear capacity; slip; two-way hinges

Date: 9/1/2010

Abstract:
The shear capacity of two-way reinforced concrete hinges is currently determined using the shear friction method, even though the behavior of these hinges under lateral load is dominated by flexural deformations. To develop a more rational method for estimating the shear capacity of two-way hinges, data from shaketable testing of five one-third scale reinforced concrete bridge column models with two-way hinges were used. The proposed method was evaluated for 10 other piers that incorporated two-way hinges at the base. It was found that the proposed method leads to a much closer correlation with the test data and smaller scatter. A design example was used to illustrate the application of the proposed method. Based on the experimental data, a nonlinear shear-slip relationship and an equation to calculate the plastic hinge length at hinges were also proposed for application in the nonlinear analysis of bridges incorporating two-way hinges.