Cumulative Seismic Damage of Reinforced Concrete Bridge Piers

El-Bahy, Ashraf; Taylor, Andrew W.; Stone, William C.; Kunnath, Sashi K.; University of Central Florida. Dept. of Civil Engineering and Environmental Sciences; Building and Fire Research Laboratory (U.S.)

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Cumulative Seismic Damage of Reinforced Concrete Bridge Piers

1997-09-01
By El-Bahy, Ashraf ; Taylor, Andrew W. ; Stone, William C. ; ...

[PDF-3.25 MB]

English

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Creators:

El-Bahy, Ashraf ; Taylor, Andrew W. ; Stone, William C. ; Kunnath, Sashi K.

El-Bahy, Ashraf ; Taylor, Andrew W. ; Stone, William C. ; Kunnath, Sashi K. Less -
Corporate Creators:

University of Central Florida. Dept. of Civil Engineering and Environmental Sciences ; Building and Fire Research Laboratory (U.S.)

University of Central Florida. Dept. of Civil Engineering and Environmental Sciences ; Building and Fire Research Laboratory (U.S.) Less -
Corporate Contributors:

KPFF Consulting Engineers ; National Center for Earthquake Engineering Research (U.S.) ; National Institute of Standards and Technology (U.S.)

KPFF Consulting Engineers ; National Center for Earthquake Engineering Research (U.S.) ; National Institute of Standards and Technology (U.S.) Less -
Subject/TRT Terms:

[+]

Bridge Piers Bridges Columns Columns(Supports) Cyclic Loads Cyclic Strength Damage Assessment Displacement Ductility Dynamic Structural Analysis Earthquake Damage Earthquake Engineering Earthquake Resistant Structures Energy Capacity Failure Modes Highway Bridges Low-cycle Fatigue Modeling Reinforced Concrete Reinforced Concrete Bridges Seismic Design Structural Members
Publication/ Report Number:

NCEER-97-0006 ; NISTIR6075

NCEER-97-0006 ; NISTIR6075 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States ; Florida

United States ; Florida Less -
Corporate Publisher:

National Institute of Standards and Technology (U.S.)
Abstract:

A comprehensive experimental study was undertaken in this research effort to investigate cumulative damage in reinforced concrete circular bridge piers. Twelve identical quarter-scale bridge columns, designed and fabricated in accordance with current AASHTO specifications, were tested in two phases. Phase I testing consisted of benchmark tests to establish the monotonic force-deformation envelope, the energy capacity under standard cyclic loads, and constant amplitude tests to determine the low-cycle fatigue characteristics of the bridge column. Phase II testing was composed of a series of analytically predicted displacement amplitudes representing the bridge response to typical earthquakes. The results of Phase I testing provided information on the fatigue behavior of reinforced concrete and Phase II provided data on the effects of load path on cumulative damage. Test observations indicate two potential failure modes: low cycle fatigue of the longitudinal reinforcing bars; and confinement failure due to rupture of the confining spirals. The former failure mode is associated with relatively large displacement amplitudes in excess of 4% lateral drift while the latter is associated with a larger number of smaller amplitude cycles. The results of the testing were also used in an analytical study of cumulative damage. It was found that none of the currently available damage models consistently predict observed damage limit states though fatigue-based models demonstrated better reliability. It was further observed that the energy-dissipation capacity of members is path-dependent, hence, models of seismic damage that rely only on measures of energy dissipation cannot predict failure if it is not related to ductility. Findings from this study will provide additional input into the development of performance based design specifications wherein design is linked to damage limit states.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:bdb52aeffdb9701790212a9f4db11ba203307f67051077095c73d558cd790981
Download URL:

https://rosap.ntl.bts.gov/view/dot/40706/dot_40706_DS1.pdf
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Cumulative Seismic Damage of Reinforced Concrete Bridge Piers

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