Rotational capacity and optimum bracing point of high strength steel I-girders

Hyun Sung Joo, Jiho Moon, Byung H. Choi, Hak Eun Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The rotational capacity of I-girders in the negative bending moment region is a crucial design parameter, since a large negative bending moment occurs near bridge piers where plastic hinges are first formed. Thus, the continuous girders on the intermediate supports must have sufficient rotational capacity (or flexural ductility) to redistribute the negative bending moment into an adjacent positive bending moment region to ensure ductile behavior of the girder. Furthermore, the rotational capacity of I-girders built up with high strength steel plates is usually smaller than that of I-girders built up with normal strength steel plates; the rotational capacity therefore needs to be improved. High strength steel with yield stress of 690 MPa was used for this study. A theoretical model to predict the rotational capacity of the I-girder with high strength steel was proposed based on the analytical model of a flexural curvature distribution diagram. The theoretical model was verified through a series of tests and parametric studies. Further, the optimum arrangement of bracing points to maximize the rotational capacity was derived, and the proposed optimum bracing point was successfully verified.

Original languageEnglish
Pages (from-to)79-89
Number of pages11
JournalJournal of Constructional Steel Research
Volume88
DOIs
Publication statusPublished - 2013 Jun 10

Fingerprint

Beams and girders
Bending moments
High strength steel
Bridge piers
Steel
Hinges
Yield stress
Ductility
Analytical models
Plastics

Keywords

  • Continuous bridge
  • Flexural ductility
  • High performance steel
  • High strength steel
  • I-girder
  • Rotational capacity

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Rotational capacity and optimum bracing point of high strength steel I-girders. / Joo, Hyun Sung; Moon, Jiho; Choi, Byung H.; Lee, Hak Eun.

In: Journal of Constructional Steel Research, Vol. 88, 10.06.2013, p. 79-89.

Research output: Contribution to journalArticle

@article{a3e66d27f95a4ddead932448e51b023b,
title = "Rotational capacity and optimum bracing point of high strength steel I-girders",
abstract = "The rotational capacity of I-girders in the negative bending moment region is a crucial design parameter, since a large negative bending moment occurs near bridge piers where plastic hinges are first formed. Thus, the continuous girders on the intermediate supports must have sufficient rotational capacity (or flexural ductility) to redistribute the negative bending moment into an adjacent positive bending moment region to ensure ductile behavior of the girder. Furthermore, the rotational capacity of I-girders built up with high strength steel plates is usually smaller than that of I-girders built up with normal strength steel plates; the rotational capacity therefore needs to be improved. High strength steel with yield stress of 690 MPa was used for this study. A theoretical model to predict the rotational capacity of the I-girder with high strength steel was proposed based on the analytical model of a flexural curvature distribution diagram. The theoretical model was verified through a series of tests and parametric studies. Further, the optimum arrangement of bracing points to maximize the rotational capacity was derived, and the proposed optimum bracing point was successfully verified.",
keywords = "Continuous bridge, Flexural ductility, High performance steel, High strength steel, I-girder, Rotational capacity",
author = "Joo, {Hyun Sung} and Jiho Moon and Choi, {Byung H.} and Lee, {Hak Eun}",
year = "2013",
month = "6",
day = "10",
doi = "10.1016/j.jcsr.2013.05.008",
language = "English",
volume = "88",
pages = "79--89",
journal = "Journal of Constructional Steel Research",
issn = "0143-974X",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Rotational capacity and optimum bracing point of high strength steel I-girders

AU - Joo, Hyun Sung

AU - Moon, Jiho

AU - Choi, Byung H.

AU - Lee, Hak Eun

PY - 2013/6/10

Y1 - 2013/6/10

N2 - The rotational capacity of I-girders in the negative bending moment region is a crucial design parameter, since a large negative bending moment occurs near bridge piers where plastic hinges are first formed. Thus, the continuous girders on the intermediate supports must have sufficient rotational capacity (or flexural ductility) to redistribute the negative bending moment into an adjacent positive bending moment region to ensure ductile behavior of the girder. Furthermore, the rotational capacity of I-girders built up with high strength steel plates is usually smaller than that of I-girders built up with normal strength steel plates; the rotational capacity therefore needs to be improved. High strength steel with yield stress of 690 MPa was used for this study. A theoretical model to predict the rotational capacity of the I-girder with high strength steel was proposed based on the analytical model of a flexural curvature distribution diagram. The theoretical model was verified through a series of tests and parametric studies. Further, the optimum arrangement of bracing points to maximize the rotational capacity was derived, and the proposed optimum bracing point was successfully verified.

AB - The rotational capacity of I-girders in the negative bending moment region is a crucial design parameter, since a large negative bending moment occurs near bridge piers where plastic hinges are first formed. Thus, the continuous girders on the intermediate supports must have sufficient rotational capacity (or flexural ductility) to redistribute the negative bending moment into an adjacent positive bending moment region to ensure ductile behavior of the girder. Furthermore, the rotational capacity of I-girders built up with high strength steel plates is usually smaller than that of I-girders built up with normal strength steel plates; the rotational capacity therefore needs to be improved. High strength steel with yield stress of 690 MPa was used for this study. A theoretical model to predict the rotational capacity of the I-girder with high strength steel was proposed based on the analytical model of a flexural curvature distribution diagram. The theoretical model was verified through a series of tests and parametric studies. Further, the optimum arrangement of bracing points to maximize the rotational capacity was derived, and the proposed optimum bracing point was successfully verified.

KW - Continuous bridge

KW - Flexural ductility

KW - High performance steel

KW - High strength steel

KW - I-girder

KW - Rotational capacity

UR - http://www.scopus.com/inward/record.url?scp=84878556301&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84878556301&partnerID=8YFLogxK

U2 - 10.1016/j.jcsr.2013.05.008

DO - 10.1016/j.jcsr.2013.05.008

M3 - Article

VL - 88

SP - 79

EP - 89

JO - Journal of Constructional Steel Research

JF - Journal of Constructional Steel Research

SN - 0143-974X

ER -