Bar fracture modeling in progressive collapse analysis of reinforced concrete structures

2011 ◽  
Vol 33 (2) ◽  
pp. 401-409 ◽  
Author(s):  
Mehrdad Sasani ◽  
Andre Werner ◽  
Ali Kazemi
Keyword(s):  
Reinforced Concrete ◽  
Progressive Collapse ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Fracture Modeling ◽  
Collapse Analysis ◽  
Progressive Collapse Analysis

scholarly journals Progressive Collapse Analysis of Reinforced Concrete Structures: A Simplified Procedure

2017 ◽  
Vol 2 (10) ◽  
pp. 7 ◽  
Author(s):  
Arash Naji ◽  
Mohamadreza Rohani
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Analysis ◽  
Static Analysis ◽  
Progressive Collapse ◽  
Concrete Structures ◽  
Nonlinear Static Analysis ◽  
Reinforced Concrete Structures ◽  
Collapse Analysis ◽  
Nonlinear Static ◽  
Progressive Collapse Analysis

In this paper, a simplified analysis procedure to calculate the column removed point displacement at progressive collapse analysis of reinforced concrete structures is proposed. The energy absorption capacity under the column missing event is used for formulations. The approximate method is simple to utilize, user friendly, yet accurate. For progressive collapse analysis of structures, linear static analysis, nonlinear static analysis, linear dynamic analysis and nonlinear dynamic analysis can be performed. In this paper, the nonlinear static analysis from alternate load path method is used and the reason of initial local collapse has not been considered. In fact, an energy-based method by using load-displacement curve of RC frame and considering the effect of floor slab for the progressive collapse analysis is considered. The accuracy of the proposed method is demonstrated by comparing the results to three experimental and analytical results. Finally, the effects of the spans length, sections dimensions, material properties and the beams reinforcements of column removed spans on substructure behavior is studied, as well.

A computationally efficient numerical model for progressive collapse analysis of reinforced concrete structures

2019 ◽  
Vol 10 (3) ◽  
pp. 330-358 ◽  
Author(s):  
Zhong-Xian Li ◽  
Bo Zhong ◽  
Yanchao Shi ◽  
Yang Ding ◽  
Yifei Hao
Keyword(s):  
Reinforced Concrete ◽  
Numerical Model ◽  
Progressive Collapse ◽  
Concrete Structures ◽  
Frame Structure ◽  
Reinforced Concrete Structures ◽  
Proposed Model ◽  
Structural Resistance ◽  
Collapse Analysis ◽  
Progressive Collapse Analysis

Although marked advancements have been achieved to improve the computer power, progressive collapse analysis of large-scale reinforced concrete structures is still time-consuming or even impractical. In this study, a numerical model is proposed for efficient progressive collapse analysis of reinforced concrete structures. Recent advancements that can accurately and efficiently model the mechanical behavior of structural components are incorporated in the numerical model of reinforced concrete structure. The beams/columns, joint regions, and slabs are modeled by enhanced fiber beam element, macrojoint model, and layered shell element, respectively. In this way, the shear failure of beams/columns, failure of joints, and resistance contribution from floor slab can be taken into account for progressive collapse analysis of reinforced concrete structures. A six-story reinforced concrete frame structure is modeled using the approach proposed in this study. The progressive collapse of the structure is analyzed under column removal and direct blast loading scenarios. For comparison purpose, other popularly used finite element models are also adopted to carry out numerical simulations. The proposed model is proven to yield accurate simulation results with the least cost of time among all models. Based on the proposed model, parametric simulations are performed to investigate effective measures to improve the structural resistance to progressive collapse. It is found that increasing longitudinal reinforcement ratio in beams and columns can increase the catenary action capacity, but hardly increases the compressive arch action capacity. Moreover, the steel mesh reinforcement at top layer of slabs plays a significant role in resisting progressive collapse of reinforced concrete structures, which should be considered in design to resist progressive collapse.

Performance of slabs in reinforced concrete structures to resist progressive collapse

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 4843-4856
Author(s):  
Bo Pang ◽  
Feiliang Wang ◽  
Jian Yang ◽  
Sandy Nyunn ◽  
Iftikhar Azim
Keyword(s):  
Reinforced Concrete ◽  
Progressive Collapse ◽  
Concrete Structures ◽  
Reinforced Concrete Structures

scholarly journals Theoretical assessment of progressive collapse capacity of reinforced concrete structures

2017 ◽  
Vol 69 (3) ◽  
pp. 145-162 ◽  
Author(s):  
Kamal Alogla ◽  
Laurence Weekes ◽  
Levingshan Augusthus-Nelson
Keyword(s):  
Reinforced Concrete ◽  
Progressive Collapse ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Theoretical Assessment
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