A New Damage-Control Target Displacement Procedure for Direct Displacement-Based Design of Circular Reinforced Concrete Bridge Pier

A New Damage-Control Target Displacement Procedure for Direct Displacement-Based Design of Circular Reinforced Concrete Bridge Pier

Mohd Ritzman Abdul Karim  Zhaohui Huang

Department of Civil and Environmental Engineering, Brunel University, UK.

Page: 
249-260
|
DOI: 
https://doi.org/10.2495/SAFE-V9-N3-249-260
Received: 
N/A
|
Accepted: 
N/A
|
Published: 
9 September 2019
| Citation

OPEN ACCESS

Abstract: 

In this paper, a new perspective procedure to determine the damage-control target displacement for circular reinforced concrete (RC) bridge pier is proposed by considering the new approach of damage-control limit states (DCLS). The new approach of DCLS is explored by integrating exist- ing damage-control concrete strain limit with recently proposed damage-control reinforcement strain limit. Modification of yield displacement and modified plastic-hinge along with new DCLS is used to estimate the damage-control target displacement for a circular RC bridge pier. Three-dimensional (3D) finite element (FE) model has been developed to validate the damage-control target displacement sub- ject to ground motion based on a nonlinear time-history (NLTH) analysis. The 3D FE model is updated to achieve a reasonable relationship between numerical, analytical, and outcomes found in the litera- ture. It is worth noting that the proposed procedure manages to estimate an improved damage-control target displacement for 7.0 m, 11.0 m and 13.0 m height of circular RC bridge pier. The influence of new reinforcement limit strain along with both modification of yield displacement and plastic-hinge contributes to providing better results. The result shows that new DCLS were efficient to predict dam- age-control target displacement, consistent with FE analysis result.

Keywords: 

circular RC bridge pier, damage-control limit states, damage-control target displacement, plastic-hinge region, yield displacement.

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