Seismic collapse assessment of a hybrid cold-formed hot-rolled steel building

Kildashti, Kamyar; Samali, Bijan; Mortazavi, Mina; Ronagh, Hamid Reza; Sharafi, Pezhman

doi:10.1016/j.jcsr.2019.01.010

Cited by 22 publications

(4 citation statements)

References 22 publications

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“…The ABAQUS/CAE v.14.1 (2014, Simulia, Providence, RI, USA) was employed to model the presented test specimen(s). The Finite Element (FE) models were adjusted to replicate the empirical tests [70]. To assure that the FE model was able to verify the real specimen(s), a range of element types and mesh matrices were carried out as trial-and-error procedures to find a sustainable structured mesh [71,72].…”

Section: Finite Element (Fe) Modellingmentioning

confidence: 99%

Evaluation of the Performance of a Composite Profile at Elevated Temperatures Using Finite Element and Hybrid Artificial Intelligence Techniques

Ding¹,

Alharbi

Almadhor

et al. 2022

Materials

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It is very important to keep structures and constructional elements in service during and after exposure to elevated temperatures. Investigation of the structural behaviour of different components and structures at elevated temperatures is an approach to manipulate the serviceability of the structures during heat exposure. Channel connectors are widely used shear connectors not only for their appealing mechanical properties but also for their workability and cost-effective nature. In this study, a finite element (FE) evaluation was performed on an authentic composite model, and the behaviour of the channel shear connector at elevated temperature was examined. Furthermore, a novel hybrid intelligence algorithm based on a feature-selection trait with the incorporation of particle swarm optimization (PSO) and multi-layer perceptron (MLP) algorithms has been developed to predict the slip response of the channel. The hybrid intelligence algorithm that uses artificial neural networks is performed on derived data from the FE study. Finally, the obtained numerical results are compared with extreme learning machine (ELM) and radial basis function (RBF) results. The MLP-PSO represented dramatically accurate results for slip value prediction at elevated temperatures. The results proved the active presence of the channels, especially to improve the stiffness and loading capacity of the composite beam. Although the height enhances the ductility, stiffness is significantly reduced at elevated temperatures. According to the results, temperature, failure load, the height of connector and concrete block strength are the key governing parameters for composite floor design against high temperatures.

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Section: Finite Element (Fe) Modellingmentioning

confidence: 99%

Evaluation of the Performance of a Composite Profile at Elevated Temperatures Using Finite Element and Hybrid Artificial Intelligence Techniques

Ding¹,

Alharbi

Almadhor

et al. 2022

Materials

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“…Wang et al [15] reported that the sheathed CFS walls improved the progressive collapse capacity of steel frames but decreased the ductility. Kildashti et al [16] proposed a hot-rolled steel knee-braced frames with CFS stud walls system. The nonlinear analyses indicated that CFS contribution to lateral loads can improve the seismic performance of the proposed system.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Numerical Analyses on Cyclic Behavior of the Prefabricated Concrete Frame Infilled with CFS-CLPM Composite Walls

Liu

Wang

et al. 2022

Buildings

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A novel CFS composite wall filled with cement-based lightweight polymer material (CFS-CLPM composite wall) has been proposed and proven to have excellent architectural and mechanical performance. To promote its application in prefabricated concrete (PC) frame structures, two full-scale specimens were designed and tested under cyclic loading to investigate the failure mode, hysteretic response and energy dissipation of the PC frame infilled with the CFS-CLPM composite wall. The experimental results indicated that CFS-CLPM composite walls can significantly improve the lateral behavior of the PC frame in terms of load capacity, elastic stiffness and energy dissipation capacity, while slightly reducing its ductility because of the infill-frame interaction. Subsequently, finite element (FE) analyses for the PC frame infilled with CFS-CLPM composite walls were developed and verified against the experimental results. The force-transferring mechanisms between the PC frame and the CFS-CLPM composite walls were revealed by analyzing the stress distributions. The parametric analyses demonstrated that the influential parameters for lateral resistances of the PC frame structure infilled with CFS-CLPM composite walls were the strength of CLPM, the span-to-height ratio and the thickness of CFS-CLPM composite walls. Finally, a formula considering the mechanical contribution of the CFS-CLPM composite wall was proposed to predict the elastic lateral stiffness of the structures. The results of this study could provide a basis for the application of CFS-CLPM composite walls in PC frame structures.

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“…While it is important that sustainable alternatives to traditional structural types be developed, attention must be paid to their seismic collapse risk to ensure adequate life safety performance. As such, seismic collapse risk assessment of buildings has gained attention in recent decades [30]. The hybrid system examined in this study utilizes the high strength and stiffness characteristics of the CLT [1] to reduce the induced displacement of the structure, and energy dissipating characteristics of the hysteretic connectors [1,31].…”

Section: Introductionmentioning

confidence: 99%

Seismic collapse risk of RC-timber hybrid building with consideration of NBCC 2020 seismic hazard model

Odikamnoro

Badal

Burton

et al. 2022

Preprint

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The latest seismic hazard model described in the 2020 National Building Code of Canada (NBCC) marks a comprehensive improvement over its predecessor (NBCC 2015). For different regions in Canada, this will have an impact on the design of new buildings and performance assessment of existing ones. In the present study, this impact is quantified for a recently developed hybrid building system of cross-laminated timber (CLT) and reinforced concrete (RC) with steel slit dampers. The six-story CLT-RC dual frame, designed using the direct displacement-based method, is located in Vancouver, Canada. Along with a very high seismicity, southwestern British Columbia is characterized by complex seismotectonics consisting of subduction, shallow crustal, and in-slab faulting mechanisms. With the NBCC 2015 and 2020 models, a hazard-consistent set of 40 pairs of ground motion records is selected from the PEER and KiK-net databases, and used to estimate the building’s seismic risk performance. The collapse capacity of the building reveals the need for the use of site-specific ground motion selection for sites with a complex seismicity. The results also indicate that the combination of CLT and steel slit dampers enhances the seismic performance of the hybrid system. The probability of collapse at a hazard level corresponding to a 2475 year return period event is estimated to be 2.7%.

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Seismic collapse assessment of a hybrid cold-formed hot-rolled steel building

Cited by 22 publications

References 22 publications

Evaluation of the Performance of a Composite Profile at Elevated Temperatures Using Finite Element and Hybrid Artificial Intelligence Techniques

Evaluation of the Performance of a Composite Profile at Elevated Temperatures Using Finite Element and Hybrid Artificial Intelligence Techniques

Experimental Investigation and Numerical Analyses on Cyclic Behavior of the Prefabricated Concrete Frame Infilled with CFS-CLPM Composite Walls

Seismic collapse risk of RC-timber hybrid building with consideration of NBCC 2020 seismic hazard model

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