Advances in Steel Materials for Innovative and Elegant Steel Structures in Japan–A Review

Kanno, Ryoichi

doi:10.2749/101686616x14555428759361

Cited by 20 publications

(26 citation statements)

References 2 publications

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“…Fig. 3 shows the maximum heights of buildings and self-standing towers and the historical timeline of the [1,2]. Steel material developments and earthquakes are also indicated in the figure.…”

Section: Steel Buildings and Steel Materialsmentioning

confidence: 99%

“…Timelines of steel demand and maximum heights of buildings and towers [1,2] Starting with the construction of the 156-m high Kasumigaseki Building in 1968, symbolic high-rise buildings have continued to be built, including the Yokohama Landmark Tower (1993) and the recent Abeno Harukas (2014), both with a height of about 300 m. As for selfstanding towers, the Tokyo Tower, the world's tallest tower at that time, was constructed in 1958. Then, in 2012, the Tokyo Skytree was built and brought the record for the tallest building back to Japan.…”

Section: Figmentioning

confidence: 99%

“…Fig. 5 shows the major characteristics of the steels developed in Japan [1,2]. The steels have "strength versatility" from high strength to low strength, "function versatility" such as weldability, fracture toughness, and deformation capacity, and "section versatility" with a variety of sectional sizes.…”

Section: Fig 4 Comparison Between Famous Towers Of the World [3]mentioning

confidence: 99%

“…Fig. 6 shows the chronological trends of the maximum tensile strength (TS) of steel plates used in bridges and buildings in Japan [1,2]. It can be seen that the application of highstrength steel advanced for bridges with the growing need for long-span bridges, and it was then expanded for use in buildings.…”

Section: Fig 4 Comparison Between Famous Towers Of the World [3]mentioning

confidence: 99%

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Advances in Steel Structures and Steel Materials in Japan

Kanno

2017

ce papers

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There are around six hundred thousand buildings that are built every year in Japan, and approximately 40% of them are constructed using steel frames. This wide application of steel frames is largely because of the continuing technological advancements in structural steel systems and steel materials for meeting a variety of needs that have evolved in the market. In this paper, starting with an overview of steel buildings in Japan, some of the advanced steel materials such as high-strength steels and seismic resistant steels are outlined with their backgrounds. Since the material advancements in Japan are largely motivated by frequent large earthquakes, the relations with seismic design are stressed throughout the paper.

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Section: Steel Buildings and Steel Materialsmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Fig 4 Comparison Between Famous Towers Of the World [3]mentioning

confidence: 99%

Section: Fig 4 Comparison Between Famous Towers Of the World [3]mentioning

confidence: 99%

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Advances in Steel Structures and Steel Materials in Japan

Kanno

2017

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“…The crack assessment approach is based on fracture toughness data from ASTM A572 Gr.50 (2013) steel plates. The fracture toughness variability can be different for high strength steel grades as well as other steel materials (Kanno, 2016), therefore, further investigation is required for these cases.…”

Section: Limitations Of the Present Studymentioning

confidence: 99%

Recommendations for Improved Welding Procedures for Thick Steel Plates Through Thermo-Mechanical Analysis

2018

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Welding of steel plates is accompanied by residual stresses that increase as the constraint provided by the welded components becomes greater. Consequently, crack initiation has been reported after welding thick plates due to the high residual stresses developed by the welding procedure. This is further exacerbated by the higher likelihood of imperfections present in thick steel plates due to the rolling and cooling process. The research described herein aims to develop improved submerged arc welding (SAW) procedures to reduce the residual stresses for steel plates of thickness greater than 50mm. Acceptance criteria are developed for discontinuities present in the steel plates prior to welding, to limit the probability of crack initiation. A parametric study of SAW procedure parameters was conducted utilizing a validated finite element model. Two welding procedures were recommended for thick steel plates. Discontinuity acceptance limits were also recommended for each welding procedure using a fracture toughness database and an expression developed to calculate the probability of a crack to initiate.Keywords: Thick steel plates -Welding procedure -Welding simulation -Discontinuities acceptance criteria This paper appears online as: Ibrahim, O., Lignos, D.G., Rogers, C.A. (2018). "Recommendations for Improved Welding Procedures for Thick Steel Plates through Thermo-Mechanical Analysis", International Journal of Steel Structures, pp. 1-20, DOI: https://doi.org/10.1007/s13296-018-0110-2 (in press). 3 IntroductionIn recent years, more stringent requirements have been employed for the design of steel infrastructure due to seismic and blast loading as well as the design complexity. For this reason, steel plates with thickness 50mm and higher are becoming common in the steel construction industry to form heavy built-up sections. Connecting such components through welding is an essential part of construction; for example, the welding of built-up members composed of thick steel plates and splice connections. Welding thick plates employs higher heat input than that required for commonly used 25mm plates. Additionally, the plate thickness provides substantial constraint to the contraction of the heated steel resulting in high post-welding tensile residual stresses that can lead to crack initiation (Blodgett & Miller, 1993;Fisher & Pense, 1987). Miller According to AWS D1.1 (2010) " Table 3.2"; the required prequalified minimum preheat and interpass temperatures for the welding of steel plates increase according to the plate thickness.However, AWS D1.1 (2010) also states in "Tables 4.2 and 4.3" that in order to qualify a welding procedure for unlimited thickness, it is permissible to use test plates of 25mm in thickness.Consequently, steel fabricators are using welding procedures qualified for thick plates that were This paper contains a proposal for an improved submerged arc welding (SAW) procedure for thick plates using a partial penetration butt joint. This was achieved based on a rigorous parametric study that in...

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Fiber‐based hysteretic model for simulating strength and stiffness deterioration of steel hollow structural section columns under cyclic loading

Suzuki

Lignos

2020

Earthq Engng Struct Dyn

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An efficient component model has been developed that captures strength and stiffness deterioration of steel hollow structural section (HSS) columns. The proposed model consists of two fiber-based segments at a member's ends along with an elastic segment in between. The fibers exhibit nonlinear uniaxial stress-strain behavior, which is explicitly defined by uniaxial monotonic tensile and cyclic round coupon tests. The postbuckling behavior of an HSS column is traced through a proposed uniaxial effective stress-strain constitutive formulation, which includes a softening branch in compression and an energy-based deterioration rule to trace the influence of cyclic deterioration in the inelastic cyclic straining. These may be inferred by uniaxial stub-column tests. The component model captures the coupling between the column axial force and flexural demands. Consistent model parameters for a number of steel materials used in the steel construction in North America and Japan are proposed along with the associated model calibration process. The efficiency of

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Advances in Steel Materials for Innovative and Elegant Steel Structures in Japan–A Review

Cited by 20 publications

References 2 publications

Advances in Steel Structures and Steel Materials in Japan

Advances in Steel Structures and Steel Materials in Japan

Recommendations for Improved Welding Procedures for Thick Steel Plates Through Thermo-Mechanical Analysis

Fiber‐based hysteretic model for simulating strength and stiffness deterioration of steel hollow structural section columns under cyclic loading

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