Shear Mechanisms in Reinforced Concrete Beams under Impact Loading

Zhao, Debo; Yi, Wei-Jian; Kunnath, Sashi K.

doi:10.1061/(asce)st.1943-541x.0001818

Cited by 120 publications

(73 citation statements)

References 13 publications

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“…To validate the proposed methods for predicting the peak response of RC beams discussed above, a database of 143 RC beams tested under Shock and Vibration drop-weight impact at midspan is compiled from other studies in the literature [1,2,7,10,[35][36][37][38][39][40][41], as listed in Supplementary Materials (available here). All the specimens considered in this study are simply supported RC beams with rectangular cross-section, and the impactors have two types of nose shape: spherical and at impact surface.…”

Section: Experimental Databasementioning

confidence: 99%

“…A file, named "Database.pdf," is the database collected from previous impact tests in the literature [1,2,7,10,[35][36][37][38][39][40][41]. e compiled database consists of 143 RC beams under dropweight impact at the midspan.…”

Section: Supplementary Materialsmentioning

confidence: 99%

“…Previous studies have indicated that RC beams subjected to impact loading usually undergo a local response phase and an overall response phase [1]. In the local response phase, a shear-plug is expected to form near the impact point [6,7], which is mainly triggered by the high peak impact force during the first impact impulse. Many impact tests have shown that shear cracks will develop at the impact point before any noticeable bending occurs [8].…”

Section: Introductionmentioning

confidence: 99%

“…us, the maximum midspan deflection can also be regarded as an important performance index for evaluating the damage degree of RC beams [9,10]. A number of drop-weight impact tests [2,6,7,10] have been conducted in order to investigate the impact behaviour of RC beams. However, the tested specimens conducted by each scholar are rather limited.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Peak Response Prediction for RC Beams under Impact Loading

Zhao

Jia

2019

Shock and Vibration

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In this paper, a novel and simple method for predicting the peak response of RC beams subjected to impact loading is proposed. e theoretical basis for calculating the peak impact force originates from the contact law, the principle of conservation of energy, the impulse-momentum theorem, and the wave theory. Additionally, the conventional beam theory, in conjunction with the wellknown layered-section approach, is utilized to obtain the force-deflection relationship of the RC beam. Subsequently, by taking into account the strain rate effect, the maximum midspan deflection of RC beams under impact loading is determined based on the conservation of energy approach. A comparison with 143 impact tests has shown that the proposed method is able to estimate the maximum midspan deflection of RC beams under impact loading with high accuracy. e prediction of the peak impact force is shown to be slightly overestimated, which however can be used in the anti-impact design to preclude the shear failure near the impact point.

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Section: Experimental Databasementioning

confidence: 99%

Section: Supplementary Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Peak Response Prediction for RC Beams under Impact Loading

Zhao

Jia

2019

Shock and Vibration

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“…e performances of concrete structures can be improved significantly by utilizing a combination of FRP and steel reinforcements [14][15][16][17][18]. In a hybrid FRP-steel reinforced concrete (hybrid FRPRC) beam (Figure 1(c)), the corrosion-resistant FRP bars are usually placed at the lower layer of the tensile zone, while the corrodible steel bars are placed at the upper layer of the tensile zone far from the environmental aggressive agents, mainly chloride ion.…”

Section: Introductionmentioning

confidence: 99%

Bond Performance of Carbon Fiber-Reinforced Polymer Bar with Dual Functions of Reinforcement and Cathodic Protection for Reinforced Concrete Structures

Zhou

Sui

Xing

et al. 2020

Advances in Polymer Technology

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The dual function of a carbon fiber-reinforced polymer (CFRP) bar working as reinforcement and impressed current cathodic protection (ICCP) anode for reinforced concrete structures has been proposed and researched in this paper. The ICCP tests with different current densities and polarization durations were first conducted for the concrete with high chloride content. After the ICCP application, pull out tests were then performed to investigate the bond behaviors of CFRP bars. Experimental results have shown the effectiveness of the new-type ICCP system with the CFRP bar as the anode on corrosion protection. The ICCP system provided electrons to the steel bar continuously and brought the potential of the steel bar down to the immunity region. Under the anodic polarization with a large current density of 100 mA/m2, the CFRP bar-concrete interface presented acidification and the chemical adhesion on the interface was decreased significantly. However, for cases in the experiment, the ICCP application had an insignificant influence on the ultimate bond strength.

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Experimental study on the reinforced concrete beams with varied stirrup reinforcement ratio under static and impact loads

Gu,

Li,

Huang

et al. 2024

Structural Concrete

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With the increasing utilization of reinforced concrete (RC) beams in eco‐friendly and fast‐paced construction practices, evaluating their impact performance becomes imperative. These beams are susceptible to unforeseen impact loads resulting from accidents or terrorist incidents throughout their service lifespan. Five groups of RC beams, each subjected to different curing periods, stirrup reinforcement, and drop hammer heights, were fabricated. Among these groups, one underwent static load testing, while the remaining groups were subjected to impact load testing utilizing the drop hammer test system. The failure modes, static response, dynamic response, and energy dissipation of RC beams were analyzed. Static tests revealed that RC beams exhibited a flexure‐governed failure mode with top surface concrete crushing, aligning with expectations. With increased stirrup reinforcement ratios, shear and flexural‐shear cracks during impact tests decreased, with high impact loads causing diagonal shear failure, severe concrete crushing, additional diagonal shear cracks, and a broader crack distribution. Higher drop hammer heights were found to increase overall energy dissipation, whereas increased stirrup reinforcement ratios resulted in moderate decrease. Specifically, the overall energy dissipation increased with higher drop hammer heights. Conversely, an increase in the stirrup reinforcement ratio was linked to a certain degree of decrease in overall energy dissipation.

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Shear Mechanisms in Reinforced Concrete Beams under Impact Loading

Cited by 120 publications

References 13 publications

Peak Response Prediction for RC Beams under Impact Loading

Peak Response Prediction for RC Beams under Impact Loading

Bond Performance of Carbon Fiber-Reinforced Polymer Bar with Dual Functions of Reinforcement and Cathodic Protection for Reinforced Concrete Structures

Experimental study on the reinforced concrete beams with varied stirrup reinforcement ratio under static and impact loads

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