Evaluation of the capacity of steel special bolted moment frame connections subjected to simulated column removal

Sustainability addresses the need to reduce the structure’s impact on the environment but does not reduce the environment’s impact on the structure. To explore this relationship, this study focuses on quantifying the impact of green roofs or vegetated roofs on seismic responses such as story displacements, interstory drifts, and floor level accelerations. Using an archetype three-story steel moment frame, nonlinear time history analyses are conducted in OpenSees for a shallow and deep green roof using a suite of ground motions from various distances from the fault to identify key trends and sensitivities in response.

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Behaviour of moment resisting reinforced concrete frames subjected to column removal scenario

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1090/1/012135 ◽

2021 ◽

Vol 1090 (1) ◽

pp. 012135

Author(s):

Methaq S. Matrood ◽

Ali Al-Rifaie ◽

Othman Hameed Zinkaah ◽

Ali A. Shubbar

Keyword(s):

Reinforced Concrete ◽

Concrete Frames ◽

Reinforced Concrete Frames ◽

Column Removal ◽

Moment Resisting ◽

Column Removal Scenario

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Quantification of model uncertainties of the energy-based method for dynamic column removal scenarios

Engineering Structures ◽

10.1016/j.engstruct.2021.112057 ◽

2021 ◽

Vol 237 ◽

pp. 112057

Author(s):

Luchuan Ding ◽

Ruben Van Coile ◽

Wouter Botte ◽

Robby Caspeele

Keyword(s):

Model Uncertainties ◽

Column Removal

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Rational Choice of Reinforcement of Reinforced Concrete Frame Corners Subjected to Opening Bending Moment

Materials ◽

10.3390/ma14123438 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3438

Author(s):

Michał Szczecina ◽

Andrzej Winnicki

Keyword(s):

Cross Section ◽

Bending Moment ◽

Plasticity Model ◽

Reinforced Concrete Frame ◽

Moment Frame ◽

Concrete Frame ◽

Rational Reinforcement ◽

Eurocode 2 ◽

Analysis Of Results

This paper discusses a choice of the most rational reinforcement details for frame corners subjected to opening bending moment. Frame corners formed from elements of both the same and different cross section heights are considered. The case of corners formed of elements of different cross section is not considered in Eurocode 2 and is very rarely described in handbooks. Several reinforcement details with both the same and different cross section heights are presented. The authors introduce a new reinforcement detail for the different cross section heights. The considered details are comprised of the primary reinforcement in the form of straight bars and loops and the additional reinforcement in the form of diagonal bars or stirrups or a combination of both diagonal stirrups and bars. Two methods of static analysis, strut-and-tie method (S&T) and finite element method (FEM), are used in the research. FEM calculations are performed with Abaqus software using the Concrete Damaged Plasticity model (CDP) for concrete and the classical metal plasticity model for reinforcing steel. The crucial CDP parameters, relaxation time and dilatation angle, were calibrated in numerical tests in Abaqus. The analysis of results from the S&T and FE methods allowed for the determination of the most rational reinforcement details.

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