Fatigue Performance of Beam-to-Column Connections With Box Sections in Steel Bridge Frame Piers

Miki, Chitoshi; Ichikawa, Atsushi; Sakamoto, Takuya; Tanabe, Atsushi; Tokida, Hideo; Shimozato, Tetsuhiro

doi:10.2208/jscej.2002.710_361

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…Following this report, Miki et al [2][3][4][5][6] performed a series of study to determine the causes of these fatigue cracks. The studies included large-scale experimental works and numerical analyses.…”

Section: Literature Reviewmentioning

confidence: 99%

“…It is observed that fatigue cracks occurred at beam-tocolumn connections of these frame piers [1], as shown like Figure 1. Causes of these fatigue cracks were experimentally investigated in previous studies [2][3][4][5][6]. As a result, in order to ensure good performance and safety of the structures, fatigue retrofit work techniques, such as drilling holes ( Figure 2) and installing bolted splices, have been conducted on severely damaged beam-to-column connections [7][8].…”

Section: Introductionmentioning

confidence: 99%

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Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers

Kinoshita

2013

ced

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Fatigue retrofit works have been conducted on severely fatigue damaged beam-tocolumn connections of existing steel frame bridge piers in Japan. It is clear that retrofit works provides additional stiffness but the significance on the seismic behavior of steel frame piers is not clear. Since fatigue retrofit works have become prevalent, the effect of fatigue retrofit works on the seismic behavior of steel frame piers need to be understood. The objective of this study is therefore to investigate these effects of the retrofit work, especially installation of bolted splices, which is the most common technique. Elasto-plastic finite element earthquake response analyses were carried out. It is shown that the existence of bolted splices may increase seismic demand on the piers when plastic hinge zone is located on the beam. In addition, longer bolted splices using low yield strength steel are proposed to overcome this problem and are shown to give beneficial effects.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers

Kinoshita

2013

ced

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“…Both experimental and numerical studies have been carried out to understand the behavior of steel box sectioned columns and also to find out effective retrofitting methods for fatigue cracks [10][11][12]. In order to prevent the development of fatigue crack and also as a fatigue retrofitting method, Tanabe et al [13] have proposed to arrange a hole at the beam-column connection as illustrated in Fig.1. Here, a "Large core" [14] is drilled with a view to removing the high stress intensity zone, fatigue cracks and other flaws.…”

Section: Introductionmentioning

confidence: 99%

A study of the seismic effects on a portal frame having a hole at the beam-column connection

Ahmed

Sasaki

2012

Thin-Walled Structures

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This paper presents the results of the study on thin walled steel portal frames, which are used in Japan as basic structural frames for motorway viaducts. A serious problem found in many such frames is fatigue cracks developed at the beam to column connection. To act as a measure against the fatigue failure, in some cases a hole is provided at the beam -column connection of the frames. In this study, dynamic analysis using real earthquake data from 3 different earthquakes have been carried out to examine the influence of such a hole on the global behavior of the frame and also on the local buckling around the location of the hole.Non-linear, large displacement analysis was performed using the FEM program MSC.Marc. The hole radius has been varied and used as a parameter of study. The results showed significant effect of the hole on local buckling and global behavior, specifically when the radius of the hole was larger than 100 mm.

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“…It was reported that embedded defects in structural connections possess three-dimensional shape and orientation, generally consisting of planar defects, such as incomplete penetration, and volumetric defects, such as blowholes 4)- 5) . Ultrasonic detection of such kinds of defects by the single probe technique is very difficult, because reflected waves cannot be efficiently detected as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Development of 3d Flaw Detection System With Multi-Channel Planar Array Probes and 3d Saft Algorithms

Rattanasuwannachart¹,

Takahashi²,

Miki³

et al. 2005

Structural Eng./Earthquake Eng.

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Multi-channel planar array probes had been developed in order to improve detectability of three-dimensional defects. The ultrasonic system, which is applicable to the planar array probes, was developed in order to make the compact and fast detection system. Specific 3D SAFT algorithms were proposed for the planar array probes. Experiments for verifying the improvement in detectability of three-dimensional defects and the advantage of the 3D SAFT processes were performed. The results show that the planar array probes and the 3D SAFTs show great improvement in detection and information of defects in three dimensions.

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Fatigue Performance of Beam-to-Column Connections With Box Sections in Steel Bridge Frame Piers

Cited by 10 publications

References 3 publications

Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers

Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers

A study of the seismic effects on a portal frame having a hole at the beam-column connection

Development of 3d Flaw Detection System With Multi-Channel Planar Array Probes and 3d Saft Algorithms

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