Tests of Fire‐Resistant Bolts and Joints

Sakumoto, Y.; Keira, Koichiro; Furumura, Fukujiro; Ave, Takeo

doi:10.1061/(asce)0733-9445(1993)119:11(3131)

Cited by 30 publications

(22 citation statements)

References 2 publications

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“…The increase of the FRR achieved using FR steel bolts was determined by comparison with normal HSS bolts. FR steel bolts properties were defined following the recommendations from Sakumoto et al [27], while HSS capacity was extracted from Eurocode 3 Part 1.2 Annex D [41] In a previous work from the authors, Pascual et al [9], it was observed that in connections to hollow steel columns in fire, at the failure instant, stresses exceeded the capacity of both, sleeve and shank. Nonetheless, in connections to CFST columns, the sleeve underwent less stresses and the shank was the compromising part for the connection.…”

Section: Fire Resistant Steel Boltsmentioning

confidence: 99%

Advanced materials for concrete-filled tubular columns and connections

et al. 2015

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The advantages of concrete-filled steel tubular (CFST) columns are well known at room and elevated temperatures, however, beyond a certain slenderness their load-bearing capacity starts to decrease. Besides, blind-bolts represent a proper system to allow endplate bolted connections to hollow steel tubular columns and CFST, although the resistance of the bolt shank conditions affects the performance of the connection. In this paper, the use of innovative materials is proposed as a method of enhancing of the load-bearing capacity for both CFST columns and connections. In this line, a first approach of the benefits using high strength steel, fire-resistant steel and geopolymer concrete applied for CFST columns in the fire situation is developed, obtaining better fire results although depending on the columns cross-sections configuration and the part where the advanced material is applied. Related to blind-bolts connections under fire conditions, the use of fire-resistant bolts is assessed. Their higher strength retention in fire could avoid the use of protection, but only in limited cases. Furthermore, a preliminary study on shape memory alloys in the blind-bolts is performed at room temperature and supporting cyclic pull-out loading.

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Section: Fire Resistant Steel Boltsmentioning

confidence: 99%

Advanced materials for concrete-filled tubular columns and connections

et al. 2015

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“…So, the effect of the FR steel and the anchored blind-bolt was more significant when column tube was thinner. steel bolts from Sakumoto et al [46]. …”

Section: Discussionmentioning

confidence: 99%

“…Their Figure 14 shows the reduction factors for the FR steel bolts from Sakumoto et al [46] under tensile load and the ones for high strength steel bolts from EC3 Annex D [40]. It can be observed that at 500ºC the reduction factor from Annex D [40] is 0.55 while experiments by Sakumoto et al [46] exhibit a value of aprox.…”

Section: Fire Resistant Steel Boltsmentioning

confidence: 99%

“…comparison of thermal elongation from Kodur [39] and EC3 [40] Fig. 14 Comparison between reduction factors from EC3 Annex D [40] and for fire resistance steel bolts from Sakumoto et al [46]. Table 1 List of the preliminary calibrated connection models at room temperature Table 2 List of single blind-bolted connections and the double T-stub connections calibrated at room temperature.…”

Section: Figmentioning

confidence: 99%

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Fire performance of blind-bolted connections to concrete filled tubular columns in tension

Pascual

Romero

Tizani

2015

Engineering Structures

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This paper describes an advanced numerical model to predict the fire behaviour of blind-bolts in the tension area of endplate connections between I-beams and concrete filled tubular (CFT) columns. It is the continuation of a previous research on the thermal response of connections, considering the tension load of a moment-resisting connection. Due to the absence of experiments and data on blind-bolts fire performance the aim was to provide a model for their study. The effect of two main variables was researched, the concrete infill of the columns and the anchored extension of the blind-bolt. The fire resistance rating (FRR), the failure mode and the force-displacement-temperature curve at high temperatures were discussed. Results proved that concrete inside the column enhances the connections response at elevated temperatures in terms of FRR and stiffness. On the other hand, the use of anchored blind-bolts compared with normal blind-bolts provided stiffer connections, but the FRR improvement depended on the plate thickness and steel bolt properties. Finally, the use of fire resistant steel bolts as a method to enhance the fire response was assessed, observing the benefits to these connections when the shank of the blind-bolt governs the failure.Pascual A M, Romero M L, Tizani W. Fire performance of blind-bolted connections to concrete filled tubular columns in tension. Engineering structures 2015;96:111-125. http://dx

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“…Sakumoto et al [96] developed an experimental program testing the tensile and shear strength of FR steel bolts for FR steel constructions. The Table 2.2 shows the reduction factors for FR steel bolts from Sakumoto et al [96] under tensile load.…”

Section: Fire Resistant Steelmentioning

confidence: 99%

Fire behaviour of blind-bolted connections to concrete filled tubular columns under tension

Pastor¹,

María²

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Tests of Fire‐Resistant Bolts and Joints

Cited by 30 publications

References 2 publications

Advanced materials for concrete-filled tubular columns and connections

Advanced materials for concrete-filled tubular columns and connections

Fire performance of blind-bolted connections to concrete filled tubular columns in tension

Fire behaviour of blind-bolted connections to concrete filled tubular columns under tension

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