Verification of Clearance and Gap for Fabricating the Buckling-Restrained Brace Using Steel Mortar Planks

Koyano, Kazuhisa; Fujita, Masanori; Iwata, Mamoru

doi:10.4028/www.scientific.net/kem.763.941

Cited by 4 publications

(3 citation statements)

References 6 publications

(9 reference statements)

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“…Further, quality control can be conducted out accurately because the degree of filling, flatness, clearance, etc. of the mortar planks of the restraining part can be visually confirmed before joining the core plate and restraining part [22].…”

Section: Introductionmentioning

confidence: 93%

Proposal and application of structural soundness monitoring system for the buckling‐restrained brace using steel mortar planks

et al. 2023

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A structural soundness monitoring system for building steel structures is effective for a quick inspection just after large earthquakes. A damage‐controlled structure can be monitored effectively because damage is strictly concentrated in energy‐absorbed members, and that, in this case, the physical quantity suitable for monitoring is displacements of those energy absorbed members. Buckling‐restrained braces (also, the BRB using steel mortar planks, BRBSM), one of the energy‐absorption members, can be directly monitored by the monitoring sensor; it will be possible to quickly evaluate the extent of damage and make a prompt decision on the replacement. Focusing on functionality of a structural soundness monitoring system, a damage evaluation method of the BRB using steel mortar planks and its corresponding monitoring system are verified conducting by a cyclic loading test. It is demonstrated that the cumulative plastic strain energy can be estimated approximately using this system, and this system is adapted to a mid‐rise steel building.

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Section: Introductionmentioning

confidence: 93%

Proposal and application of structural soundness monitoring system for the buckling‐restrained brace using steel mortar planks

et al. 2023

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“…Further, quality control can be carried out accurately because the degree of filling, flatness, clearance, etc. of the mortar planks of the restraining part can be visually confirmed before joining the core plate and restraining part [11].…”

Section: Introductionmentioning

confidence: 93%

“…compressive strength P c by max. tensile strength P t for each axial strain amplitude) was considered as in the previous studies [11,12]. The relationship between compression-to-tension strength ratio α and loading strain is shown in Fig.…”

Section: Compression-to-tension Strength Ratio α and Clearancementioning

confidence: 99%

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

et al. 2022

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The clearance between the core plate and the restraining part of the buckling-restrained brace using steel mortar planks (BRBSM) considerably affects the failure mode and hysteretic characteristics of the brace. A clearance adjustment construction is proposed for the BRBSM which can control the clearance through partially pasting clearance adjustment materials and polishing the mortar plank surface. First, the clearance adjustment construction workflow and quality control are demonstrated, and it is verified that the clearance can be assured by fabricating specimens. Further, the effects of the difference in clearance between the core plate and restraining part on the structural performance of the BRBSM in terms of failure behaviour, increase strength ratio, buckling mode and cumu lative plastic strain energy ratio are evaluated by conducting a cyclic axial loading test.

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Effects of the unevenness on infilled material surface of the restraining parts on the structural performance of the buckling‐restrained brace using steel mortar planks

Fujita,

Awazu,

Nakamura

et al. 2024

Steel Construction

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The clearance between the core plate and restraining part of the buckling‐restrained brace using steel mortar planks (BRBSM) considerably affects its failure mode status and hysteretic characteristics. When the clearance is controlled by average, in some cases, the clearance exceeds its average value by local unevenness on infilled material surface. As a continuation of our study on the BRBSM with controlled clearance, effects of the unevenness on the infilled material surface of the restraining parts on the structural performance of the buckling‐restrained brace are examined and the possibility of securing a clearance that allows for the evenness is shown. A cyclic axial loading test is conducted using specimens with the evenness on infilled material surface; the effects on the failure mode, strength increase ratio, compression‐to‐tension strength ratio, and cumulative plastic strain energy ratio of the BRBSM are evaluated. Furthermore, the propagation process of the higher‐order buckling modes and the unevenness on infilled material surface are examined, measuring the strain distribution of the core plate under compressive and tensile loading.

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Verification of Clearance and Gap for Fabricating the Buckling-Restrained Brace Using Steel Mortar Planks

Cited by 4 publications

References 6 publications

Proposal and application of structural soundness monitoring system for the buckling‐restrained brace using steel mortar planks

Proposal and application of structural soundness monitoring system for the buckling‐restrained brace using steel mortar planks

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

Effects of the unevenness on infilled material surface of the restraining parts on the structural performance of the buckling‐restrained brace using steel mortar planks

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