Investigating the failure behaviors of RC beams without stirrups under impact loading

Fu, Yingqian; Yu, Xiaodong; Dong, Xiaomei; Zhou, Fenghua; Ning, Jianguo; Li, Ping; Zheng, Yuxuan

doi:10.1016/j.ijimpeng.2019.103432

Cited by 47 publications

(18 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As shown in Figure 10e,f, the stress and strain curves against time for particles within X = 0 to 63 mm in the spalling test. The stress and strain data were calculated using Equations (6) and 7based on the regularized particle velocity.…”

Section: Under High Loading Ratementioning

confidence: 99%

“…Concrete-like brittle materials (such as cement, mortar, concrete, and geomaterials) are widely used in civil and military structural engineering [1][2][3]. Recently, it becomes a growing trend to improve the impact resistance of structures with these concrete-like brittle materials [4][5][6]. Evaluating the effective constitutive parameters of these materials under dynamic condition is thus of vital importance for designing the structures [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Improved Lagrangian-Inverse Method for Evaluating the Dynamic Constitutive Parameters of Concrete

Dong

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

The dynamic constitutive behaviors of concrete-like materials are of vital importance for structure designing under impact loading conditions. This study proposes a new method to evaluate the constitutive behaviors of ordinary concrete at high strain rates. The proposed method combines the Lagrangian-inverse analysis method with optical techniques (ultra-high-speed camera and digital image correlation techniques). The proposed method is validated against finite-element simulation. Spalling tests were conducted on concretes where optical techniques were employed to obtain the high-frequency spatial and temporal displacement data. We then obtained stress–strain curves of concrete by applying the proposed method on the results of spalling tests. The results show non-linear constitutive behaviors in these stress–strain curves. These non-linear constitutive behaviors can be possibly explained by local heterogeneity of concrete. The proposed method provides an alternative mean to access the dynamic constitutive behaviors which can help future structure designing of concrete-like materials.

show abstract

Section: Under High Loading Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Improved Lagrangian-Inverse Method for Evaluating the Dynamic Constitutive Parameters of Concrete

Dong

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The following equations are proposed for the relationship between dissipated energy and concrete compressive strength for the reinforced slab with and without the CFRP strips, respectively. E diss f c, CFRP = 0.0082 f c,CFRP + 2.5452 (15) E diss f c, no CFRP = 0.0086 f c, no CFRP + 2.2431 (16) where f c and E diss are in MPa and kJ, respectively. The linear regression R 2 values were 0.775 and 0.831, respectively.…”

Section: Impact Velocitymentioning

confidence: 99%

“…The energy dissipated by the member acts as a guide on how the ductility and deformability of a structure can be improved. Such information is crucial in evaluating the impact performance and adequacy of column members and provides predictions of post-failure behaviour [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

et al. 2020

View full text Add to dashboard Cite

Reinforced concrete (RC) members in critical structures, such as bridge piers, high-rise buildings, and offshore facilities, are vulnerable to impact loads throughout their service life. For example, vehicle collisions, accidental loading, or unpredicted attacks could occur. The numerical models presented in this paper are shown to adequately replicate the impact behaviour and damage process of fibre-reinforced polymer (FRP)-strengthened concrete-filled steel tube (CFST) columns and Reinforced Concrete slabs. Validated models are developed using Abaqus/Explicit by reproducing the results obtained from experimental testing on bare CFST and RC slab members. Parameters relating to the FRP and material components are investigated to determine the influence on structural behaviour. The innovative method of using the dissipated energy approach for structural evaluation provides an assessment of the effective use of FRP and material properties to enhance the dynamic response. The outcome of the evaluation, including the geometrical, material, and contact properties modelling, shows that there is an agreement between the numerical and experimental behaviour of the selected concrete members. The experimentation shows that the calibration of the models is a crucial task, which was considered and resulted in matching the force–displacement behaviour and achieving the same maximum impact force and displacement values. Different novel and complicated Finite Element Models were comprehensively developed. The developed numerical models could precisely predict both local and global structural responses in the different reinforced concrete members. The application of the current numerical techniques can be extended to design structural members where there are no reliable practical guidelines on both national and international levels.

show abstract

“…Many comprehensive experimental and analytical studies exist in the literature where the impact behavior of the concrete or RC beam elements is investigated. In addition, the impact behavior of beams manufactured using fiber RC and beams strengthened with fiber-reinforced polymer strips have been investigated [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of support type effect on plastic hinges in RC beam under impact load

Yılmaz

Mercimek

Ghoroubı

et al. 2021

Structural Concrete

View full text Add to dashboard Cite

This study investigates the effect of support types on plastic hinges in reinforced concrete (RC) beam under the influence of impact loading. In previous studies, the assumption of the linear distribution of inertia force under impact loading was examined and verified according to experimental, analytical, and numerical results. Furthermore, it was emphasized that the most important parameters affecting the behavior of RC beams under impact loading were plastic hinges. A three-stage study was planned to investigate this subject. The first stage was an experimental study. In this part, four RC beams with simple and fixed supports were tested under the low-velocity impact load with two different impact energy levels by using a free-weight test setup with advanced measurement techniques. The time histories of the accelerations, the displacements, and the impact loads acting on RC beams were recorded, and the cracks from impact loading were observed. The dynamic responses obtained from experiments have been interpreted in detail. The most important issue about plastic hinges was that the hinges do not reach the supports and remain on the beam. This is valid for both hinge support and fixed support. In the second stage of the study, an explicit numerical analysis model, which was verified with experimental results, was developed. The clear agreement between the experimental and numerical results was demonstrated. It has been concluded that proposed finite element procedures can be used for evaluation of the dynamic responses and failure modes of RC beams under low-velocity impact loading. The last part was an analytical study. In this part, the proposed analytical procedure in the previous studies considering the plastic joint formed in a simple support beam under impact loading was confirmed, and a new coefficient for fixed support was proposed. A good agreement has been achieved between analytical and experimental work. K E Y W O R D Sfree drop test, impact load, plastic hinge location, RC beam, support type Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

show abstract

Investigating the failure behaviors of RC beams without stirrups under impact loading

Cited by 47 publications

References 39 publications

An Improved Lagrangian-Inverse Method for Evaluating the Dynamic Constitutive Parameters of Concrete

An Improved Lagrangian-Inverse Method for Evaluating the Dynamic Constitutive Parameters of Concrete

Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading

Investigation of support type effect on plastic hinges in RC beam under impact load

Contact Info

Product

Resources

About