Resistance of Flat-Plate Buildings against Progressive Collapse. I: Modeling of Slab-Column Connections

Liu, Jinrong; Tian, Yudong; Orton, Sarah; Said, Aly

doi:10.1061/(asce)st.1943-541x.0001294

Cited by 36 publications

(27 citation statements)

References 16 publications

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“…Their work indicated that the compressive membrane action can be appropriately simulated by adding partial lateral restraints to the slab-column connections. Liu et al (2015) developed a numerical model for slab-column connections with the flexural, torsional, in-plane and shear behaviors being considered for progressive collapse analyses. The connection model was further applied to conduct a parametric study of a flat plate building.…”

Section: Existing Work On Progressive Collapse Of Rc Flat Platesmentioning

confidence: 99%

Load Transfer and Collapse Resistance of RC Flat Plates under Interior Column Removal Scenario

et al. 2018

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Reinforced concrete (RC) flat-plate structures are vulnerable to punching shear failure at their slab-column connections, potentially leading to a catastrophic progressive collapse. In practice, the slab-column connection above an interior column, removed due to abnormal loads, may be subjected to a concentrated downward force due to the absence of the supporting column and further being pushed due to different live load intensities on individual stories. This force is different to the full design load that the column withstands in normal situation and, combined to the gravity load acting on the slab, may cause punching shear failure at the interior slabcolumn connection. This will further trigger failure propagation to the surrounding slab-column connections. This paper presents the experimental tests performed on two identical large scale 2×2-bay RC flat-plate specimens under an interior column removal scenario. A 5 kPa uniformly distributed load was applied first to the slab followed by an incremental concentrated force imposed on the slab-column connection above the removed interior column. The complete collapse resistant behavior and load redistribution pattern of the specimens were investigated and are reported herein. Results show that more than 90% of the applied concentrated force is solely distributed to the four nearest adjacent columns. Three load carrying mechanism phases, in form of flexural, tensile membrane, and a combination of one-way catenary and dowel actions can be distinguished in resisting the applied concentrated load.

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Section: Existing Work On Progressive Collapse Of Rc Flat Platesmentioning

confidence: 99%

Load Transfer and Collapse Resistance of RC Flat Plates under Interior Column Removal Scenario

et al. 2018

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“…Moreover, the adjoining slab will experience a torsional action. Combination of these induced forces results in severe stress concentration at the slab-column joint region, likely leading to a punching shear failure (Liu et al 2015).…”

Section: Failure Mechanisms Pertinent To Rc Flat Platesmentioning

confidence: 99%

Current trends and developments in progressive collapse research on reinforced concrete flat plate structures

Xue¹,

Guan²,

Gilbert³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Progressive collapse of structures caused by extreme or accidental loads may lead to significant loss of life and property. Considerable research efforts have been made to date to mitigate the probability of progressive collapse and its consequences. This study summarises the fundamentals of progressive collapse in relation to the existing theoretical concepts and understanding. Specifically the existing theories pertinent to progressive collapse of building structures, in particular reinforced concrete (RC) flat plates, are examined from the following four key aspects: (1) definition of progressive collapse from deformation and/or strength perspectives with respect to the failure criteria of structural members and the entire structural system; (2) failure mechanisms of load-bearing systems undergoing progressive collapse with respect to the structural ultimate capacity, which has not been considered in the design process; (3) research methodologies for investigating collapse mechanisms, with emphases on experimental and numerical approaches; and (4) collapse-resistant design principles as covered in several international design standards in which a number of robustness requirements have been recognised. Based on the schematic review of the current trends and developments, gaps and limitations in progressive collapse research are identified and a new research direction is established to advance the progressive collapse study of RC flat plate structures.

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“…Kim et al (2015) conducted drop-weight tests of 14 beam specimens considering a progressive collapse condition of RC buildings. Experimental and analytical studies of progressive collapse have been conducted by many researchers (Dat et al 2015;Liu et al 2015aLiu et al , 2015bPrasad et al 2014;Qian et al 2015aQian et al , 2015b. Among these, Liu et al (2015a) analyzed the progressive collapse of a four-story RC building considering separation between columns and slabs due to punching shear.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental and analytical studies of progressive collapse have been conducted by many researchers (Dat et al 2015;Liu et al 2015aLiu et al , 2015bPrasad et al 2014;Qian et al 2015aQian et al , 2015b. Among these, Liu et al (2015a) analyzed the progressive collapse of a four-story RC building considering separation between columns and slabs due to punching shear. Fine 3D numerical models of a large number of degrees of freedom have also been used to estimate impact loads due to tsunami waves (Salem et al 2014) and traffic accidents (Yi et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Investigations of Seismic Pounding of Adjacent 14-Story Reinforced Concrete Buildings Damaged in 1985 Mexico Earthquake

Chujo

Yoshikado

Sato

et al. 2016

ACT

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Seismic pounding of a 14-story reinforced concrete building, Nuevo León, damaged in the 1985 Mexico Earthquake is investigated by means of dynamic finite element analyses and cyclic loading tests of columns specimens. The building consisted of three adjacent units connected with 100-mm wide expansion joints. It was thought that the poundings caused impact lateral forces and frictions that resulted in serious structural damage. This study attempts quantification of the impact lateral load by the following four steps.(1) Two kinds of seismic response finite element analyses of a single unit of the building are conducted with /without simplified contact modeling with joint elements to approximately estimate the overall structural behavior. (2) Cyclic load test of two column specimens that represent a column of the building. One of the specimens is a simple column while the other consists of four pounding units, to which the column contacts during loading. Comparison of the two specimens indicates that the contact induces additional lateral shear force to the column. (3) Repeated cyclic responses of the two specimens are computed by static finite element analyses. The contact and friction behaviors are classified into normal and shear components to develop a constitutive model to be implemented into the two-node joint element. (4) A finite element model of two partial building units connected with the two-node joint elements is subjected to seismic response analysis. The analysis result indicates that the pounding causes an impact load equivalent to 0.9% of the total weight of a building unit.

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Resistance of Flat-Plate Buildings against Progressive Collapse. I: Modeling of Slab-Column Connections

Cited by 36 publications

References 16 publications

Load Transfer and Collapse Resistance of RC Flat Plates under Interior Column Removal Scenario

Load Transfer and Collapse Resistance of RC Flat Plates under Interior Column Removal Scenario

Current trends and developments in progressive collapse research on reinforced concrete flat plate structures

Experimental and Analytical Investigations of Seismic Pounding of Adjacent 14-Story Reinforced Concrete Buildings Damaged in 1985 Mexico Earthquake

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