Experimental and theoretical study of seismic and progressive collapse resilient composite frames

Tian, Yuan; Lin, Kaiqi; Lu, Xinzheng; Zhang, Lei; Li, Yi; Guan, Hong

doi:10.1016/j.soildyn.2020.106370

Cited by 25 publications

(8 citation statements)

References 52 publications

(81 reference statements)

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“…Currently, few studies on prestressed concrete structures were reported in literature (Keyvani and Sasani 2015, Keyvani and Sasani 2016, Qian et al 2018, Tian et al 2020, Qian et al 2021, Husain et al 2021. And also, most of those studies use unbonded posttensioned strands (UPS).…”

Section: Introductionmentioning

confidence: 99%

Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios

et al. 2022

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To fully recognize the load-resisting mechanisms of posttensioned concrete (PC) structures with realistic boundary conditions against disproportionate collapse, four beam-column subassemblies were extracted from a prototype building; and the side columns and joints are reproduced to reflect the actual boundary condition. The parametric analysis was conducted, including location of the removed column (middle or penultimate) and strand profile (straight or parabolic). In addition, two reinforced concrete (RC) counterparts were tested as control group.Test results indicate that the unbonded post-tensioning strand (UPS) was able to enhance the structural robustness by increasing compressive arch action capacity of RC beams and developing catenary action. Compared with RC specimens, both PC specimens achieved much higher load resistance; herein, the PC specimen with straight strand profile obtained the highest load resistance due to two strands used, while the PC specimen with parabolic profile had higher deformation capacity. However, the existence of UPS increased the tensile force demand to the side column, leading to the flexural tension failure of the side column when the loss of a penultimate column was considered. Finally, analytical study was carried out to quantify the load resistance from each dominant load resisting mechanisms.

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Section: Introductionmentioning

confidence: 99%

Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios

et al. 2022

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“…The main reason, with the exception of the human factor, of progressive collapse is design flaws caused by the absence or imperfection of the design and design prerequisites of the regulatory framework to prevent or reduce the catastrophic consequences of this phenomenon [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Execution at NIIZhB them. AA Gvozdev's research allowed recommending A500SP class reinforcement for wide use in reinforced concrete structures, including those used in domestic buildings and structures designed to prevent progressive collapse and during construction in earthquake-prone areas [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Elimination of the effect of progressive collapse as a factor in increasing the environmental friendliness of district buildings

et al. 2021

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The work is devoted to the principle of designing residential quarters with the exclusion of building collapse according to the “domino” principle, ie. without the development of progressive collapse in the event of an accident. This principle increases the efficiency of the “green” development of the construction industry. The work provides real examples when the mistake of the architect of the improvement of the district cost the integrity of a large quarter, presents pictures of man-made disasters associated with the collapse of entire microdistricts. The text of the article is a study of methods and tools for designing buildings and structures, which, being combined into one quarter, will be able to maintain structural integrity in the event of a collapse of one of the components of such a residential building. The principles of calculating a reinforced concrete monolith that prevent progressive collapse are highlighted. Also, the text of the article contains the author’s nomogram, obtained empirically and confirmed by experiments.

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“…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%

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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Experimental and theoretical study of seismic and progressive collapse resilient composite frames

Cited by 25 publications

References 52 publications

Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios

Robustness of Post-Tensioned Concrete Beam-Column Subassemblies under Various Column Removal Scenarios

Elimination of the effect of progressive collapse as a factor in increasing the environmental friendliness of district buildings

Progressive Collapse Resistance of Formwork Support System with Couplers

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