Lateral force distribution in the inelastic state for seismic design of high‐strength steel framed‐tube structures with shear links

Zhang, Hao; Lian, Ming; Su, Mingzhou; Cheng, Qianqian

doi:10.1002/tal.1801

Cited by 5 publications

(1 citation statement)

References 28 publications

(37 reference statements)

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“…In seismic engineering design, it is necessary to input the near-field and far-field ground motions separately for seismic analysis. Scholars have classified near-fault records when R is less than or equal to 20 km [32,33] and far-fault records when R is 20 km to 60 km [34]. In order to enhance the differentiation between near-field and far-field earthquakes, in this paper we have relaxed the classification based on rupture distance; near-field ground motions were defined with R ≤ 20 km and far-field ground motions were defined with R ≥ 80 km.…”

Section: Seismic Wave Selectionmentioning

confidence: 99%

Methods of Assessing the Damage Capacity of Input Seismic Motions for Underground Structures

Li,

Wei

2024

Buildings

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This paper investigates a method for improving the selection of seismic motions for designing earthquake-resistant underground structures. It is found that PGV alone is unreliable as a predictor of structural damage with increasing earthquake intensity. Therefore, based on characterizing seismic intensity by using PGV, another parameter, referred to here as “the severest parameter”, is introduced to distinguish potential damage capacity for different seismic motions. A numerical model of a soil–underground structure system was established using the finite element software OpenSees. A total of 120 real ground motions were selected for the model, considering the influences of eight different site groups on the underground station and the rupture distances of the input seismic motions. The results show that as seismic intensity increases, substantial variability in the response of underground structures emerges under the same amplitude of PGV, diminishing the effectiveness of the relationship between PGV and structural damage. When assessing the potential damage capacity of seismic motions with similar or close amplitudes of PGV, VSI is an appropriate severest parameter for Class III sites and ASI is suitable for Class II sites. When the correlation coefficient between the severest parameter and the structural response is greater than 0.8, it can be used to reliably assess seismic damage capacity based on the size of the severest parameter.

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Section: Seismic Wave Selectionmentioning

confidence: 99%

Methods of Assessing the Damage Capacity of Input Seismic Motions for Underground Structures

Li,

Wei

2024

Buildings

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Seismic collapse performance assessment of high‐strength steel framed‐tube structures with shear links fabricated using low‐yield‐point steel

Zhang,

Su,

Lian

et al. 2024

Structural Design Tall Build

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SummaryA high‐strength steel framed‐tube structure with shear links fabricated using low‐yield‐point steel (HSSFTS‐LYPSL) was developed in this study to improve the seismic performance and resilience of the conventional steel framed‐tube structure. When this HSSFTS‐LYPSL is subjected to strong earthquake excitation, its shear links undergo significant plastic deformation to dissipate seismic energy while critical components such as the spandrel beams and columns maintain their elasticity. Furthermore, the replacement of damaged links was facilitated by the use of bolted end‐plate connections. This study designed three typical HSSFTS‐LYPSL examples with 20, 30, and 40 stories to investigate the seismic collapse performances of HSSFTS‐LYPSLs at different seismic intensity levels. Three‐dimensional nonlinear finite element analysis models of these example structures were developed using the OpenSEES software, and the accuracy and effectiveness of the modeling approach was validated by comparing its results with those of quasi‐static tests on sub‐structure assemblies. Next, 40 records each of far‐field and pulse‐type near‐field ground motions were selected and applied with an incremental dynamic analysis (IDA) to obtain response curves for the example structures and calculate their collapse fragility curves and collapse margin ratios (CMRs) utilizing a modified collapse fragility model. Finally, based on the collapse fragility and seismic hazard curves, the seismic collapse risk probability curves of the HSSFTS‐LYPSLs were obtained under far‐ and near‐field earthquakes, revealing that at the maximum considered earthquake level, the CMR values ranged from 5.74 to 7.25 and from 4.85 to 6.67, respectively; at the very rare earthquake (VRE) level, the CMR values ranged from 3.83 to 4.85 and from 3.24 to 4.46, respectively. These results demonstrate that HSSFTS‐LYPSLs exhibit sufficient potential for seismic collapse resistance. As pulse‐type near‐field earthquakes had more significant and adverse impacts on the seismic collapse performances of the HSSFTS‐LYPSLs than far‐field earthquakes, the seismic collapse design of an HSSFTS‐LYPSL should particularly consider the influence of near‐field effects. In addition, the seismic hazard function had a greater effect on the structural seismic collapse risk curves than the collapse fragility function, suggesting that seismic collapse risk curves could provide a comprehensive assessment of HSSFTS‐LYPSL seismic collapse performance. Under far‐ and near‐field earthquakes, the annual collapse risk probabilities of the HSSFTS‐LYPSL examples at the VRE level were within 1.18 × 10−5–4.53 × 10−5, which is below the seismic collapse risk threshold recommended by others, indicating that HSSFTS‐LYPSLs can meet the fourth‐level performance objective of “no collapse failure at the VRE level.” However, this study only conducted seismic collapse and risk assessments using example HSSFTS‐LYPSLs; future research will focus on determining the seismic recovery capacities of and developing post‐earthquake repairability methodologies for HSSFTS‐LYPSLs.

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A Review on Performance-Based Plastic Design Method: Concept and Recent Developments

Leelataviwat

Doung

Naiyana

2021

Lecture Notes in Civil Engineering

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Lateral force distribution in the inelastic state for seismic design of high‐strength steel framed‐tube structures with shear links

Cited by 5 publications

References 28 publications

Methods of Assessing the Damage Capacity of Input Seismic Motions for Underground Structures

Methods of Assessing the Damage Capacity of Input Seismic Motions for Underground Structures

Seismic collapse performance assessment of high‐strength steel framed‐tube structures with shear links fabricated using low‐yield‐point steel

A Review on Performance-Based Plastic Design Method: Concept and Recent Developments

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