Assessment of Progressive Collapse Proneness of Existing Typical Garment Factory Buildings in Bangladesh

Manzur, Tanvir; Mahmood, Mohammad Hasan; Baten, Bayezid; Hasan, Md. Jihan; Hossain, Md. Rashnal; Noor, Munaz Ahmed; Yazdani, Nur

doi:10.1061/(asce)cf.1943-5509.0001496

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…During the simulation process of the failure of tube, the axial force growth rate of the several tubes with large changes were: 19 During the simulation process of No. 13 failure, the axial force growth rate of several tubes with larger changes were: 13.56% for No.…”

Section: Positions Of Member Failurementioning

confidence: 99%

“…The PC occurs when some components in the structure are locally damaged in the case of accidental external load or large local load, which will cause the original load to be redistributed to the rest of the components, and then lead to damages to them, resulting in a chain effect, and eventually a continuous collapse that is disproportionate to the initial damage [18][19][20][21]. At present, most of the domestic research results on formwork support system focus on the calculation model, bearing capacity, and load probability model, but there have been few studies on its PC resistance performance and collapse mechanism, lacking sufficient reference for the compilation of specifications and the design and construction of actual engineering.…”

Section: Introductionmentioning

confidence: 99%

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Progressive Collapse Resistance of Formwork Support System with Couplers

Wu¹,

Zheng²,

Gao³

et al. 2020

MMEP

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Following the rapid development of China's construction industry, the formwork support system has become one of the indispensable temporary facilities at construction sites such as industrial and civil construction, and bridges. This paper aims to study the progressive collapse (PC) resistance of the formwork support system with couplers under accidental loads. To this end, the software ANSYS/LS-DYNA was used to establish a finite element model, and the components were removed in a short time to simulate the sudden failure of local members under accidental loads. Besides, based on the growth rate of axial force, the authors compared the PC resistance of formwork support systems under the conditions of different failure time, failure positions, spacing of upright tubes, lift height of horizontal tubes, and semi-rigid node stiffness. The results show that: the shorter the local failure time of the structure, the more obvious the dynamic response of the remaining structure; under the failure of different members, the maximum growth rate of the axial force for the adjacent members ranked from large to small: angle member>side member>internal member; in case of the member failure, the maximum growth rate for the axial force in the adjacent members is proportional to the spacing between upright tubes and inversely proportional to the lift height of the horizontal tubes; with the increase of the node stiffness, the maximum growth rate of the axial force hardly changes, but the response time of structural yielding gradually increases. The research findings provide references for future research in this direction and the compilation of specifications.

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Section: Positions Of Member Failurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Resistance of Formwork Support System with Couplers

Wu¹,

Zheng²,

Gao³

et al. 2020

MMEP

View full text Add to dashboard Cite

show abstract

Assessment on the Progressive Collapse Resistance of a Long-Span Curved Spatial Grid Structure with Main Trusses

Zhou

Song

et al. 2021

KSCE J Civ Eng

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The present work is aimed at studying the progressive collapse resistance of the terminal building of Zhongchuan Airport in Lanzhou, China, which is a long-span curved spatial grid structure with main trusses. Firstly, the finite element model was built using MSC.Marc software. The alternate load path method (AP method) was used to simulate the initial failure of component. An improved method of zoned concept judgment and sensitivity analysis was proposed to determine the key components. Then, the initial failure components were removed individually on the course of analyzing. The responses of remaining structure were calculated using nonlinear dynamic analysis method. According to the results, the structure has a strong ability of resisting progressive collapse, though the structural responses are significant when removing the concrete filled steel tubular column directly supporting the roof at cantilever end. The maximum vertical displacement reaches 10 m. Moreover, the proposed method can avoid omitting the key components having significant influence on structural progressive collapse resistance. In addition, the influences brought by the cross-sectional sizes of chord and web members were investigated through conducting parametric analysis. The research can provide references for the structural optimization and safety control of similar long-span spatial structures.

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