Experimental Study on Shear Deformation Behavior of High Strength Bolts at Elevated Temperature

Hirashima, Takeo; Hamada, Naoyuki; Ozaki, Fuminobu; Ave, Takeo; Uesugi, Hideki

doi:10.3130/aijs.72.175_2

Cited by 21 publications

(10 citation statements)

References 1 publication

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“…The strength reduction factor of the bolts at elevated temperature was given by Eq. 8 from the results of our previous study [16] on HSFG bolts as shown in Fig. 12 (b).…”

Section: Critical Temperature Of the Beammentioning

confidence: 81%

An Experimental Investigation of Structural Fire Behaviour of a Rigid Steel Frame

Hirashima¹,

Okuwaki²,

Zhao³

et al. 2014

Fire Saf. Sci.

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Some experimental studies have been conducted on structural fire behaviour of steel sub-frames in order to investigate the effects of thermal stress due to the axial restraint from columns to a heated beam on the behaviour of connections, and its influences on the connected beam and robustness of steel frames. However, the object connections were not beam-to-beam connections but beam-to-column connections with fin plates, end plates, and web cleats. This paper discusses, on the basis of experimental results, structural fire behaviour of a rigid steel frame with fully-moment-resisting beam-to-beam connections with splice plates and HSFG bolts, and beam-to-column connections with full penetration welds. The structural behaviour in the test was also analysed with finite element analysis using Bernoulli-Euler beam elements. The test results indicated that the moment-resisting connections in the rigid steel frame have sufficient load-carrying capacity, but failure may occur in the connected beam due to inadequate shear resistance of the beam web in fire. The critical temperature of the steel beam could be approximated on the basis of its inherent resistance at elevated temperature and initial effects, because the thermal stress disappeared at the fire limit stage. This study was also intended to provide experimental data to help understand the fundamental behaviour of rigid steel frames in fire.

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“…The strength reduction factor of the bolts at elevated temperature was given by Eq. 8 from the results of our previous study [16] on HSFG bolts as shown in Fig. 12 (b).…”

Section: Critical Temperature Of the Beammentioning

confidence: 81%

An Experimental Investigation of Structural Fire Behaviour of a Rigid Steel Frame

Hirashima¹,

Okuwaki²,

Zhao³

et al. 2014

Fire Saf. Sci.

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“…The fracture conditions of the member joints are considered by examining the bending strains, axial tensile strain, and shear strains in a member as follows:

|\frac{κ_{x}}{κ_{x 0}}| - 1 ⩾ 0 or |\frac{κ_{y}}{κ_{y 0}}| - 1 ⩾ 0 or |\frac{γ_{italicxz}}{γ_{xz 0}}| - 1 ⩾ 0 or |\frac{γ_{italicyz}}{γ_{yz 0}}| - 1 ⩾ 0 or (\frac{ε_{z}}{ε_{z 0}}) - 1 ⩾ 0

where κ x and κ y ; γ xz and γ yz ; ε z ; and κ x 0 , κ y 0 , γ xz 0 , γ yz 0 , and ε z 0 are the bending strains around the X and Y axes, the shear strains for the X and Y axes, the axial tensile strain, and the critical values for these strains. The critical strain values used in the analysis are the values actually obtained from some experiments concerning the fracture of joint bolts .…”

Section: Asi‐gauss Codementioning

confidence: 99%

“…strains. The critical strain values used in the analysis are the values actually obtained from some experiments concerning the fracture of joint bolts [29]. Elemental contact is considered in the numerical code by connecting the gap elements between the pairs of elements that are in contact, as determined by their geometric relationships.…”

Section: Vandv Of a Seismic Response Analysis Code For Framed Structuresmentioning

confidence: 99%

Verification and validation of a seismic response analysis code for framed structures using the ASI‐Gauss technique

Isobe

Han

Miyamura

2013

Earthq Engng Struct Dyn

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SUMMARYIn this report, the capabilities of the adaptively shifted integration (ASI)-Gauss code in the analysis of the seismic responses of framed structures are verified and validated by comparing the results with detailed numerical simulations performed by the parallel finite element analysis code, E-Simulator, and with experimental results obtained by E-Defense. The numerical results obtained by both codes showed good agreement with the experimental results obtained by E-Defense. Furthermore, seismic waves with unnaturally large magnitudes are applied to a high-rise building model to demonstrate the ability of the ASI-Gauss code to analyze the collapse behaviors of building frames.

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“…where and y-axes, the shear strains for the x-and y-axes, the axial tensile strain and the critical values for these strains, respectively. The critical values were fixed using information from actual experimental data [8]. Contact determination is found by examining the geometrical locations of the elements, and once two elements are determined to be in contact, they are bound with four gap elements between the nodes [4].…”

Section: Numerical Integration Pointmentioning

confidence: 99%

Seismic pounding and collapse behavior of neighboring buildings with different natural periods

Isobe¹,

Ohta²,

Inoue³

et al. 2012

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Seismic pounding phenomena, particularly the collision of neighboring buildings under long-period ground motion, are becoming a significant issue in Japan. We focused on a specific apartment structure called the Nuevo Leon buildings in the Tlatelolco district of Mexico City, which consisted of three similar buildings built consecutively with narrow expansion joints between the buildings. Two out of the three buildings collapsed completely in the 1985 Mexican earthquake. Using a finite element code based on the adaptively shifted integration (ASI)-Gauss technique, a seismic pounding analysis is performed on a simulated model of the Nuevo Leon buildings to understand the impact and collapse behavior of structures built near each other. The numerical code used in the analysis provides a higher computational efficiency than the conventional code for this type of problem and enables us to address dynamic behavior with strong nonlinearities, including phenomena such as member fracture and elemental contact. Contact release and recontact algorithms are developed and implemented in the code to understand the complex behaviors of structural members during seismic pounding and the collapse sequence. According to the numerical results, the collision of the buildings may be a result of the difference of natural periods between the neighboring buildings. This difference was detected in similar buildings from the damages caused by previous earthquakes. By setting the natural period of the north building to be 25% longer than the other periods, the ground motion, which hada relatively long period of 2 s, first caused the collision between the north and the center buildings. This collision eventually led to the collapse of the centerbuilding, followed by the destruction of the north building

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Experimental Study on Shear Deformation Behavior of High Strength Bolts at Elevated Temperature

Cited by 21 publications

References 1 publication

An Experimental Investigation of Structural Fire Behaviour of a Rigid Steel Frame

An Experimental Investigation of Structural Fire Behaviour of a Rigid Steel Frame

Verification and validation of a seismic response analysis code for framed structures using the ASI‐Gauss technique

Seismic pounding and collapse behavior of neighboring buildings with different natural periods

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