Post tensioned tendons for seismic retrofitting of weak bolted T-stub connections

Saberi, Vahid; Gerami, Mohsen; Kheyroddin, Ali

doi:10.1007/s13296-017-9003-z

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…Post-tensioned strands have also been suggested for the retrofitting of weak bolted T-stub connections, as well as for modifying pinned connections into moment ones [181] and for avoiding the progressive collapse of frames [182].…”

Section: Connections In Systems With Supplementary Dampingmentioning

confidence: 99%

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

et al. 2022

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The importance of connections in steel structures is paramount, not only because it greatly influences the cost of construction and provides room for innovations, but also due to the connections’ impact on global structural behaviour. Therefore, research into innovative connections for seismic applications and related design criteria has significantly grown in recent years. However, it has been pursued mostly on local—connection or frame—levels, leaving the system analysis and code compliance levels with a meagre investigation. Moreover, less than 1% of published papers concerning steel connections and earthquake engineering are review articles. To overcome this gap, this systematic review of more than 240 references, including scientific contributions and design codes in the field aimed to cover both recent research and current shortcomings in practice and regulations. It has been found that European design rules updated to a fully performance-based design philosophy is imminent and is deemed to bring pre-qualified joints and increased complexity. Design rules have been systematized, and current hindrances have been highlighted. A deeper look into research needs and trends showed that investigations in connections for concentrically X braced frames are still a necessity, while developments in self-centring and replaceable connections as well as in simple solutions for increasing damping are expected to modify how joints are designed, as soon as semi-rigid and partial strength connections are more easily allowed by design codes.

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Section: Connections In Systems With Supplementary Dampingmentioning

confidence: 99%

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

et al. 2022

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“…Parameter studies proved the acceptable self-centering capacity of the PTTC. Saberi et al [16] proposed the bolted T-stub connections equipped with weak bots and T-stubs. Similar to the ED angles introduced before, the plastic hinges will occur on the T-stubs as shown in Figure 4 in the case of the connection gap opening, providing a reasonable energy dissipation.…”

Section: Connections With Yielding Ed Devicesmentioning

confidence: 99%

Self-Centering Steel Frame Systems for Seismic-Resistant Structures

Zhu

Zhao

2020

Advances in Civil Engineering

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This paper introduces a review of self-centering steel frame systems for seismic-resistant structures. The components and basic mechanisms of the developing posttensioned connections and self-centering braces are briefly introduced. The structural details and seismic behaviors of the self-centering systems proposed in recent years, including connections, energy dissipating braces, and steel frames, are condensed in categories. The theoretical and experimental results indicated that self-centering action could minimize residual deformation and structural damage. The energy dissipating capability of the self-centering systems is greatly enhanced by the application of energy dissipating device. The shape memory alloys (SMAs) and prepressed springs which exhibited great potential in energy dissipation and recentering capability have been studied increasingly in recent years. Abundant numerical models were propounded to investigate the cyclic response of these self-centering systems. The current research challenges and the critical issues which need further study are discussed at the end of this paper.

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“…Figure 1 shows that the T-section accounts for the column flange's deformation and the end plate's bending in the case of an extended end plate-bolted connection. 28 Because the column flange is unstiffened, the T-section on the column side is orientated at right angles to the end plate T-section. The models for the column and the end plate sides are different.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, one of these connections is the T-section beam-column connection; − much research has been done in the literature, but there is very little research on the T-section beam-column connection after the fire and corrosion. Figure shows that the T-section accounts for the column flange’s deformation and the end plate’s bending in the case of an extended end plate-bolted connection . Because the column flange is unstiffened, the T-section on the column side is orientated at right angles to the end plate T-section.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Corrosion and Fire Damage on the Steel-Bolted T-Section Connections Used in the Steel Construction

Maali,

Kiliç,

Sagiroglu Maali

et al. 2023

ACS Omega

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The most common type of connection in steel structures is the T-section connection. Steel structures can be damaged due to environmental effects such as earthquakes, fires, corrosion, etc., in real applications used in industry. Therefore, in this study, the corrosion and fire condition effects that occur in the T-section connection on the behavior of the connection zone were investigated. The study was carried out with 18 T-section connections with various corrosion (hydrochloric acid and sulfuric acid) in different layers at 5, 10, 15, and 20% corrosion levels, and fire (ISO834) conditions after corrosion have been evaluated and compared. T-section-bolted joints examined in the study were produced using IPE300 standard profiles. In the first part of the study, the behavior of the 18 T-section connections under an axial tensile load has been determined experimentally. The second part created a finite element model with the ABAQUS program for all models. It was seen that the finite element model analysis results converged with the results obtained as a result of the experimental study. As a result, compared to H2SO4 corrosion, HCl corrosion has little effect on the load–deformation characteristics of the connections. Also, if corrosion specimens are exposed to fire, then the connections will change from semirigid to hinged.

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Post tensioned tendons for seismic retrofitting of weak bolted T-stub connections

Cited by 5 publications

References 14 publications

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

Self-Centering Steel Frame Systems for Seismic-Resistant Structures

The Effects of Corrosion and Fire Damage on the Steel-Bolted T-Section Connections Used in the Steel Construction

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