Constitutive Model and Mechanical Properties of Grade 8.8 and 10.9 High-Strength Bolts at Elevated Temperatures

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dc.authoridSaglik, Huseyin/0000-0001-7803-3708
dc.contributor.authorSaglik, Huseyin
dc.contributor.authorEtemadi, Ali
dc.contributor.authorChen, Airong
dc.contributor.authorMa, Rujin
dc.date.accessioned2025-03-26T17:35:10Z
dc.date.available2025-03-26T17:35:10Z
dc.date.issued2024
dc.departmentİstanbul Esenyurt Üniversitesi, Fakülteler, Mühendislik ve Mimarlık Fakültesi, İnşaat Mühendisliği Bölümü
dc.description.abstractThis paper presents an experimental study on the determination of the mechanical behaviors of Grade 8.8 and 10.9 high-strength bolts at elevated temperatures. Strength reduction coefficients are obtained based on test results at temperatures ranging from 20 degrees C to 900 degrees C, for both yield and ultimate stresses. Simplified expressions are presented to identify the strength reduction factors at considered temperatures. At 400 degrees C, the yield and ultimate strengths of bolts decrease by 30%-35% for both grades compared to those in ambient temperature. Yield strengths are 30% and 20% of yield strengths of Grade 8.8 and 10.9 bolts at ambient temperature, respectively, when the temperature exceeds 500 degrees C. The ultimate strength decreases slightly slower than the yield strength at high temperatures. Although the decrease in ultimate strength follows the decrease in yield strength at elevated temperatures, it is slightly slower. About 3%-6% of yield and ultimate strengths at ambient temperature remain for both grades at 700 degrees C. Moreover, a series of expressions are provided to obtain the full range stress-strain curve of high-strength bolts at elevated temperatures. Comprehensive literature studies are taken into consideration to propose a more generalized description of the stress-strain curves. The proposed model can be fully drawn by only using elastic modulus, yield, and ultimate stresses at ambient temperature. It is shown that the proposed model has enough efficiency to describe the general material behavior at elevated temperatures.
dc.description.sponsorshipKey Programs of Natural Science Foundation of China [52238005]; Scientific Research Projects Coordination Unit (BAP) of Istanbul Esenyurt University
dc.description.sponsorshipH. Saglik, A. Chen, and R. Ma acknowledge the financial support from the Key Programs of Natural Science Foundation of China (Grant 52238005). A. Etemadi acknowledges financial support from the Scientific Research Projects Coordination Unit (BAP) of Istanbul Esenyurt University.
dc.identifier.doi10.1061/JSENDH.STENG-12629
dc.identifier.issn0733-9445
dc.identifier.issn1943-541X
dc.identifier.issue6
dc.identifier.scopus2-s2.0-85188794971
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1061/JSENDH.STENG-12629
dc.identifier.urihttps://hdl.handle.net/20.500.14704/1075
dc.identifier.volume150
dc.identifier.wosWOS:001202620300013
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAsce-Amer Soc Civil Engineers
dc.relation.ispartofJournal of Structural Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250326
dc.subjectHigh-strength (HS) bolts; Elevated temperature; Stress-strain curve; Strength reduction coefficient; Fire
dc.titleConstitutive Model and Mechanical Properties of Grade 8.8 and 10.9 High-Strength Bolts at Elevated Temperatures
dc.typeArticle

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