Progressive collapsed zone extent estimation in two-way slab floors by yield line analysis

Pachenari, Alireza; Keramati, Abolghassem

doi:10.1680/macr.13.00249

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…In many studies, structural responses of reinforced concrete (RC) sub-assemblages, including two beams and three columns, under the middle column removal scenario are considered as a basis for estimating the resistance of real frames (Abbasnia et al, 2016; Ahmadi et al, 2016; Lew et al, 2014; Su et al, 2009; Yu et al, 2014; Yu and Tan, 2011, 2013). The effects of slabs with compressive membrane action and tensile membrane action, which are developed in RC slab, are also investigated in some studies (Cosgun and Sayin, 2017; Kai and Li, 2012b; Pachenari and Keramati, 2014b; Qian and Li, 2015a, 2015b).…”

Section: Introductionmentioning

confidence: 99%

Analytical investigation of reinforced concrete frames under middle column removal scenario

Nav

Usefi

Abbasnia

2017

Advances in Structural Engineering

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A simplified theoretical model is developed in the present study in order to predict the general behavior and resistance of reinforced concrete frames under column removal scenarios. The proposed model defines the load-deflection response of the middle joint above the removed column based on a four-stage procedure: classical beam mechanism stage, arching stage, transient stage, and catenary stage. A comprehensive evaluation study using two validation approaches is performed in order to investigate the reliability of the introduced model. For validation of theoretical model, the results of a comprehensive finite element method and experimental data were utilized and the results were compared with the theoretical model. The results demonstrated that the proposed theoretical procedure can establish a reliable foundation for progressive collapse assessment of reinforced concrete frame structures. The proposed model can also predict behavior of symmetrical frames, and this was validated by good agreement between finite element results and the results of the proposed numerical model.

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Section: Introductionmentioning

confidence: 99%

Analytical investigation of reinforced concrete frames under middle column removal scenario

Nav

Usefi

Abbasnia

2017

Advances in Structural Engineering

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“…For different seismic fortification intensities, it was noted that the load versus displacement curves exhibited similar characteristics, and the more stringent seismic design and detailing increased the failure displacement and the ultimate load. There have been reports of studies that have analyzed progressive collapse behavior of RC frames or beam-slab substructures by experiments or numerical analyses (Mehrdad et al 2007;Pham and Tan 2013a, b;Pachenari and Keramati 2014;Qian et al 2015). It was found that tensile membrane actions in slabs that inevitably develop in large deformation stage play a key role in its collapse resistance.…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Resistance of RC Frames under a Side Column Removal Scenario: The Mechanism Explained

Hou

2016

Int J Concr Struct Mater

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Progressive collapse resistance of RC buildings can be analyzed by considering column loss scenarios. Using finite element analysis and a static test, the progressive collapse process of a RC frame under monotonic vertical displacement of a side column was investigated, simulating a column removal scenario. A single-story 1/3 scale RC frame that comprises two spans and two bays was tested and computed, and downward displacement of a side column was placed until failure. Our study offers insight into the failure modes and progressive collapse behavior of a RC frame. It has been noted that the damage of structural members (beams and slabs) occurs only in the bay where the removal side column is located. Greater catenary action and tensile membrane action are mobilized in the frame beams and slabs, respectively, at large deformations, but they mainly happen in the direction where the frame beams and slabs are laterally restrained. Based on the experimental and computational results, the mechanism of progressive collapse resistance of RC frames at different stages was discussed further. With large deformations, a simplified calculation method for catenary action and tensile membrane action is proposed.

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“…By doubledesigning a frame-wall structure with this assumption that it had high or low design of lateral loads and by removing an external wall in the first story, BAO and KUNNATH [8] concluded that further design of lateral loads leads to more progressive collapse resistance and less vertical displacement of the upper joint of the removed wall. PACHENARI and KERAMATI [9] introduced relevant beam-slab collapse modes of the impacted story in the case that column loss scenario causes adjoining panels to fall down in a two-way slab reinforced concrete structure. They concluded that the ratio of beam to slab flexural strength and existing dead and live loads on panels in the vicinity of impacted panels could change the collapse pattern and subsequently control the prevailing collapse mode.…”

Section: Introductionmentioning

confidence: 99%

Progressive collapse resisting capacity of reinforced concrete load bearing wall structures

Rahai

Shahin

Hatami

2015

J. Cent. South Univ.

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Reinforced concrete (RC) load bearing wall is widely used in high-rise and mid-rise buildings. Due to the number of walls in plan and reduction in lateral force portion, this system is not only stronger against earthquakes, but also more economical. The effect of progressive collapse caused by removal of load bearing elements, in various positions in plan and stories of the RC load bearing wall system was evaluated by nonlinear dynamic and static analyses. For this purpose, three-dimensional model of 10-story structure was selected. The analysis results indicated stability, strength and stiffness of the RC load-bearing wall system against progressive collapse. It was observed that the most critical condition for removal of load bearing walls was the instantaneous removal of the surrounding walls located at the corners of the building where the sections of the load bearing elements were changed. In this case, the maximum vertical displacement was limited to 6.3 mm and the structure failed after applying the load of 10 times the axial load bored by removed elements. Comparison between the results of the nonlinear dynamic and static analyses demonstrated that the "load factor" parameter was a reasonable criterion to evaluate the progressive collapse potential of the structure.

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Progressive collapsed zone extent estimation in two-way slab floors by yield line analysis

Cited by 11 publications

References 10 publications

Analytical investigation of reinforced concrete frames under middle column removal scenario

Analytical investigation of reinforced concrete frames under middle column removal scenario

Progressive Collapse Resistance of RC Frames under a Side Column Removal Scenario: The Mechanism Explained

Progressive collapse resisting capacity of reinforced concrete load bearing wall structures

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