P-I Diagram Generation for Reinforced Concrete (RC) Columns Under High Impulsive Loads Using Ale Method

Abedini, Masoud; Mutalib, Azrul A.; Raman, Sudharshan Naidu

doi:10.18488/journal.2.2017.77.253.262

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…In general, as the scaled distance decreased, the intensity of the blast load along the height of the RC columns increased. Therefore a decrease in the scaled distance of the blast load results in an increase in the peak pressure [32]. The results indicate the maximum recorded pressures increase from the lower scaled distances to the higher scaled distances.…”

Section: Blast Response Of Rc Columnsmentioning

confidence: 84%

Numerical Simulation of Air Shock Wave Propagation Effects in Reinforced Concrete Columns

Akhlaghi¹

2020

J. Model. Optim.

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Reinforced concrete has been shown to be a desirable material of choice in blast resistant structures due to its availability, relatively low cost, and its inherent ability to absorb energy produced by explosions. Most research work investigating the behaviour of reinforced concrete columns to blast loading have concentrated on their response to planar loading from far-field explosions. Limited amount of work is available on the effects of near-field explosion on the behaviour of reinforced concrete columns. This study is aimed to investigate effects of explosive loads on RC column by using ALE method. Commercial finite element package, LS-DYNA is used to simulate the behavior of blast wave on RC columns. Numerical simulation is validated against experimental work done in literature. The experience gained from this research provides valuable information for the development of the finite element modeling of real blast load effects on RC columns.

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Section: Blast Response Of Rc Columnsmentioning

confidence: 84%

Numerical Simulation of Air Shock Wave Propagation Effects in Reinforced Concrete Columns

Akhlaghi¹

2020

J. Model. Optim.

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“…In this study, the keyword of *CONTACT_1D is implemented to consider the bond-slip interactive effect between the concrete and longitudinal rebars [41]. The bond between the rebar and concrete is assumed to be elastic perfectly plastic.…”

Section: Contact Algorithmmentioning

confidence: 99%

Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads

Abedini

Mutalib

Mehrmashhadi

et al. 2020

Front. Struct. Civ. Eng.

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Reinforced concretes (RC) have been widely used in constructions. In construction, one of the critical elements carrying a high percentage of the weight is columns which were not used to design to absorb large dynamic load like surface bursts. This study focuses on investigating blast load parameters to design more resistant RC columns to blast loads. The numerical model is based on finite element analysis (FEA) using LS-DYNA. Numerical results are validated against blast field tests available online. Couples of simulations are performed with changing blast parameters to study effects of various scaled distances on the nonlinear behavior of RC columns. According to simulation results, the scaled distance has a substantial impact on the blast response of RC columns. With lower scaled distance, higher peak pressure and larger pressure impulse are applied on the RC column. Eventually, keeping the scaled distance unchanged, increasing the charge weight or shorter standoff distance cause more damage to the RC column. Intensive studies are carried out to investigate the effects of scaled distance and charge weight on the damage degree and residual axial load carrying capacity of RC columns with various column width, longitudinal reinforcement ratio and concrete strength. Results of this research will be used to assessment the effect of an explosion on the dynamic behavior of RC columns.

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“…In recent times, significant amount of research have been undertaken by researchers and various organizations in different parts of the world, in an attempt to better understand the effect of dynamic loads and actions on structures, and their contribution towards the behavior and response of structures Mehrmashhadi et al 2019;Kim and Lee 2017;Mutalib et al 2013;Abedini et al 2017). Steel structures are widely used in different structural and infrastructural engineering applications as; for roof trusses, halls and warehouses, towers for power and telecommunication transmissions, pipes, bridges, foot bridges and high-rise buildings (Castro et al 2005;Heidarpour and Bradford 2009).…”

Section: Introductionmentioning

confidence: 99%

Strengthening of the Panel Zone in Steel Moment Resisting Frames

Zhang¹,

Raman²,

Mutalib³

et al. 2019

Preprint

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Rehabilitation and retrofitting of structures designed in accordance to standard design codes is an essential practice in structural engineering and design. For steel structures, one of the challenges is to strengthen the panel zone as well as its analysis in moment-resisting frames. In this research, investigations were undertaken to analyze the influence of the panel zone in the response of structural frames through a computational approach using ETABS software. Moment-resisting frames of six stories were studied in supposition of real panel zone, different values of rigid zone factor, different thickness of double plates, and both double plates and rigid zone factor together. The frames were analyzed, designed and validated in accordance to Iranian steel building code. The results of drift values for six stories building models were plotted. After verifying and comparing the results, the findings showed that the rigidity lead to reduction in drifts of frames and also as a result, lower rigidity will be used for high rise building and higher rigidity will be used for low rise building. In frames with story drifts more than the permitted rate, where the frames are considered as the weaker panel zone area, the story drifts can be limited by strengthening the panel zone with double plates. It should be noted that higher thickness of double plates and higher rigidity of panel zone will result in enhancement of the non-linear deformation rates in beam elements. The resulting deformations of the panel zone due to this modification can have significant influence on the elastic and inelastic behavior of the frames.

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P-I Diagram Generation for Reinforced Concrete (RC) Columns Under High Impulsive Loads Using Ale Method

Cited by 3 publications

References 9 publications

Numerical Simulation of Air Shock Wave Propagation Effects in Reinforced Concrete Columns

Numerical Simulation of Air Shock Wave Propagation Effects in Reinforced Concrete Columns

Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads

Strengthening of the Panel Zone in Steel Moment Resisting Frames

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