Vulnerability of Three-Dimensional Semirigid Composite Frame Subjected to Progressive Collapse

Galal, Mohamed Ahmed; Bandyopadhyay, Milan; Banik, Atul Krishna

doi:10.1061/(asce)cf.1943-5509.0001297

Cited by 14 publications

(6 citation statements)

References 30 publications

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“…9-story 3D steel-concrete building early used by Marjanishvili and Agnew [3] and Galal et al [5] is considered herein for the progressive collapse analysis. The building contains 3-bay in the short-side direction and 6-bay in the long-side direction 9.75 m and 8.25 m, respectively.…”

Section: Development Of the Numerical Modelmentioning

confidence: 99%

“…All frames in the long-side direction and the perimeter frames in the short-side direction are moment resistant frame with TSD connection, and the other frames are gravity frame with pin connection. The building cross sections and arrangement of the rebar are presented in details in Galal et al [5] and are not repeated herein for clarity. A 3D view of the building is shown in Fig.…”

Section: Development Of the Numerical Modelmentioning

confidence: 99%

“…Galal et al [5] present a comprehensive study of the behaviour of 3D steel-concrete composite building under column removal scenarios. Nonlinear dynamic analysis of 9-story building with three different type of semi-rigid connection is carried out using ABAQUS FE tool.…”

Section: Introductionmentioning

confidence: 99%

“…ALP method is a threat-independent approach, and its only consider one column removal regardless of the threat amount and type. Sadek et al [6], Kwasniewski [7], Khandelwal et al [8], Alashker et al [9], Alashker et al [10] and Galal et al [5] present a great effort and study the progressive collapse potential of different type of structures under column removal scenarios following the ALP approach recommended by GSA 2003 [11] and DoD 2009 [12]. In spite of the ALP method, is widely accepted and commonly used, but it is still doubtful as it is assuming only one column removal scenario.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of the Alternative Load Path Method to Evaluate the Progressive Collapse Potential of 3D Building under Blast Load

Galal¹,

Banik²

2019

World Congress on Civil, Structural, and Environmental Engineering

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the work in the progressive collapse of three-dimensional composite buildings quite limited due to the cost and difficulties of the full-scale experimental tests and the complexity of the modelling technique. Researchers and design engineers are following The Alternative Load Path method (ALP) recommended by GSA and DoD guidelines to mitigate the progressive collapse potential. The commonly used ALP method, which considers as a threat-independent methodology, taking into account single column removal scenarios only regardless of the threat load type. This paper investigates the efficiency of the ALP to determine the progressive collapse potential of 3D composite building when subjected to 500 kg of TNT. Two-stage nonlinear dynamic analysis of 3D composite 9-story building with top and seat double web angle connection is carried out. In the first stage of analysis the axial load carried by the columns under gravity load is calculated. The second stage devotes to find out the number of columns likely to be involved in the progressive collapse using the damage index criteria through three-step of loading. A precise analysis is implemented to find out the effect of column location in the remaining capacity of the column. The influence of the boundary condition on the column response under blast load is highlighted. The results show that the ALP methodology is not usually conservative and may be more than one column wiped out under 500 kg of TNT which may be carried by a small vehicle. The commonly used damage criteria (stability, yielding and fracture) cannot capture the realistic damage of axial load bearing column, and the damage index which is related to its global behaviour has to be used. The structure response drastically increased when two columns removed at a time under blast load compared to the single column removal recommended by ALP of the DoD.

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Section: Development Of the Numerical Modelmentioning

confidence: 99%

Section: Development Of the Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficiency of the Alternative Load Path Method to Evaluate the Progressive Collapse Potential of 3D Building under Blast Load

Galal¹,

Banik²

2019

World Congress on Civil, Structural, and Environmental Engineering

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“…The performance of steel structures subjected to extreme loading has received increased attention in recent years [1][2][3][4]. Existing studies have highlighted the significance of connection configuration and associated parameters in enhancing the overall structural performance and avoidance of progressive collapse.…”

Section: Introductionmentioning

confidence: 99%

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

et al. 2021

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A novel method to improve the robustness of steel end plate connections is presented in this paper. Existing commonly adopted techniques alter the stiffness of the beam or the end plate to improve the connection’s robustness. In this study, the robustness is enhanced by improving the contribution of the bolts to the rotational capacity of connections; the higher the bolts’ elongation, the higher the rotational capacity that can be achieved. However, the brittleness of the bolt material, combined with its small length, results in negligible elongation. Alternatively, the load path between the end plate and the bolts can be interrupted with a ductile element to achieve the required elongation. This can be achieved by inserting a steel sleeve with a designated length, thickness, and wall curvature between the end plate and the washer. The proposed sleeve should be designed so that its ultimate capacity is less than the force in the bolt at failure; accordingly, the sleeve develops a severe bending deformation before the failure of any connection components. Using a validated finite element model, end plate connections with various parameters are numerically investigated to understand the performance of the sleeve device. The proposed system substantially enhances the rotational capacity of the connections, ranging between 1.37 and 2.46 times that of the standard connection. It is also concluded that the sleeved connections exhibit a consistent elastic response with the standard connections, indicating the proposed system is compatible with codified elastic design approaches without modification. Furthermore, for a specific connection, various ductile responses can be achieved without altering the connection capacity nor configuration.

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Progressive collapse resistance of prestressed concrete frame structures with infill walls considering instantaneous column failure

Qu,

Zeng,

Zhou

et al. 2024

Structural Design Tall Build

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Prestressed concrete frames with infill walls (IW‐PC frames) are commonly used in civil engineering as a structural element. The possibility of structures undergoing progressive collapse is a cause for concern due to its severe consequences. This has become a significant topic in the academic community in recent years. However, research on the resistance of IW‐PC frame structures to progressive collapse is still insufficient. Therefore, this paper investigated the dynamic effects of progressive collapse on the IW‐PC frame, reinforced concrete frame with infill walls (IW‐RC), prestressed concrete frame (PC), and common reinforced concrete frame (RC). The study was conducted using the finite element software OpenSees. The study revealed that the vertical displacement during stabilization of the IW‐PC frame increased by 92.5% and 71.7% compared to the IW‐RC frame and decreased by 93.9% and 92.6% compared to the PC frame for middle column and side column failure, respectively. Additionally, the IW‐PC frame exhibited the highest dynamic load carrying capacity, which was 7.67 and 7.56 times higher than that of the RC frame, respectively. The mechanical properties of the frame were altered by the coupling effect of prestressed tendons and infill walls, making the IW‐PC frame more monolithic.

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Vulnerability of Three-Dimensional Semirigid Composite Frame Subjected to Progressive Collapse

Cited by 14 publications

References 30 publications

Efficiency of the Alternative Load Path Method to Evaluate the Progressive Collapse Potential of 3D Building under Blast Load

Efficiency of the Alternative Load Path Method to Evaluate the Progressive Collapse Potential of 3D Building under Blast Load

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

Progressive collapse resistance of prestressed concrete frame structures with infill walls considering instantaneous column failure

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