Quasi‐Static Cyclic Test on a Concrete‐Encased Frame‐Reinforced Concrete Tube Building Model

Zeng, Lei; Xiao, Yao; Chen, Juan; Chen, Yi-Guang

doi:10.1155/2018/5643872

Cited by 12 publications

(7 citation statements)

References 25 publications

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“…Concrete is commonly used in civil engineering material. For better understanding of concrete, many researchers are devoted to studying the properties of concrete materials and concrete structures [1][2][3][4][5]. For four-component ordinary concrete, fine aggregate and coarse aggregate account for 70% to 80% of the volume of concrete [6], which plays the role of structural frame of concrete.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies of Dynamic Mechanical Properties of Desert Sand Concrete and Ordinary Concrete

Chen

Liu

Han

et al. 2022

Shock and Vibration

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Ningxia is located in the western part of China, which abounds with desert resources. The application of desert sand in concrete has not been fully studied. In order to study the failure mechanism of desert sand concrete under impact loading, dynamic impact experiments on desert sand concrete and ordinary concrete were carried out by using the 74 mm diameter split Hopkinson pressure bar (SHPB) experimental apparatus. The dynamic mechanical properties of desert sand concrete under different impact velocities were analyzed. The random distribution program of round coarse aggregate in desert sand concrete was designed to generate the random distribution of coarse aggregate by ANSYS/APDL language. The dynamic failure process of single-graded concrete and two-graded concrete was numerically simulated and compared. The results showed that desert sand concrete and ordinary concrete have obvious rate-dependent effect. Detailedly, the ordinary concrete is totally destroyed when impact velocity is 10 m/s, but the desert sand concrete still maintains the cone shape at impact velocity of 18 m/s, which indicates that the impact resistance of desert sand concrete is better than that of ordinary concrete. When impact velocity is 5 m/s, the single-graded concrete and two-graded concrete are both destroyed, but the desert sand concrete is not damaged. When impact velocity is 10 m/s, the dynamic failure mode of single-graded concrete, two-graded concrete, and desert sand concrete is basically the same. When impact velocity is 15 m/s, the single-grade concrete shows different dynamic failure mode from that of desert sand concrete and two-graded concrete.

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Section: Introductionmentioning

confidence: 99%

Comparative Studies of Dynamic Mechanical Properties of Desert Sand Concrete and Ordinary Concrete

Chen

Liu

Han

et al. 2022

Shock and Vibration

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“…e existing literature shows that the application of PVA fiber in concrete has great potential and value. So far, the related research studies of PVA fiber concrete are mainly focused on the basic mechanical properties [7][8][9][10][11], bending behavior [12][13][14], impact properties [11,15], mechanical properties under the freeze-thaw cycle [16][17][18], and high-temperature properties [19][20][21][22][23], while the damped energy dissipation characteristics concerned by engineering seismic research are less studied [24].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Rubber Powder on Mechanical Properties of PVA Fiber Concrete

Wang

Zeng

et al. 2021

Advances in Civil Engineering

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To verify the damping improvement by replacing partial sand with rubber powder in the concrete process, this study investigated the effects of the rubber powder (5%, 10%, 15%, and 20%) on the mechanical properties and micromechanism of polyvinyl alcohol (PVA) fiber-reinforced concrete. In addition, in order to discuss its damping performance, free vibration test was conducted. Microstructure analyses were conducted by the scanning electron microscope (SEM) test. These results indicated that, as the content of the rubber powder increased, the damping ratio increased, and the compressive strength decreased, but this strength loss can be effectively controlled by adding PVA fiber. The rubber powder with a volume content of 5% and PVA with a mass of 2.4 kg/m3 were the most optimal mixing to balance the strength and damping requirement. According to the SEM test results, the rubber powder was beneficial to improve the damping ratio of PVA concrete, but it aggravated its interface defects.

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“…Piezoelectric ceramic smart aggregate, due to its advantages of low cost (Du et al, 2016a(Du et al, , 2016bZeng et al, 2015), strong piezoelectric effect (Zeng et al, 2018;Song et al, 2017), fast response with wide band and high frequency (Hu et al, 2014;Yang et al, 2008;Wang et al, 2014), the ability to be used as actuators and sensors (Wang et al, 2016;Shao et al, 2016), the capacity to harvest energy and so on, is widely used in structural health monitoring and damage detection. The piezoceramicbased active-sensing method has been accepted in the field of structural health monitoring and applied to the health diagnosis of structural damage in blasting engineering (Song et al, 2004;Krishna and Rajanna, 2004).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on blast damage of RC T-beam bridge

Peng

Cai

Tian-hua

et al. 2021

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Purpose The purpose of this paper is to investigate the explosive performance and explosion damage mechanism of T-beam bridge structure. Design/methodology/approach On the basis of the existing specification, two T-beam bridge models were designed and fabricated. Test specimens of different explosive dosage and different blast height were carried out. The mechanical process, failure mode, blast damage model, damage identification mechanism and blast evolution law and quantitative evaluation were taken into account. Findings The results revealed that the web plate fracture failure is the key to the unstable failure of the whole T-beam bridge. The explosion failure phenomenon and blast damage evaluation criterion of RC T-beam bridge was divided into five stages: the original cracks stage of concrete material (D = 0 ∼ 0.1), the fractures initiation stage of concrete material (D = 0.1 ∼ 0.3), the stable expansion stage of cracks in concrete material (D = 0.3 ∼ 0.55), the unstable expansion stage of cracks in concrete material (D = 0.55 ∼ 0.8), the explosion fracture of steel bars and the overall instability and damage of the bridge (D = 0.8 ∼ 1.0), which can also be described as basically intact, slight damage, moderate damage, severe damage and collapsed. Social implications The research result will provide basis for the antiknock evaluation and damage repair technical specifications of the RC T-beam bridge. Originality/value The research results of damage evaluation serve as a basis for damage repair and reinforcement of bridge structures after explosion.

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Quasi‐Static Cyclic Test on a Concrete‐Encased Frame‐Reinforced Concrete Tube Building Model

Cited by 12 publications

References 25 publications

Comparative Studies of Dynamic Mechanical Properties of Desert Sand Concrete and Ordinary Concrete

Comparative Studies of Dynamic Mechanical Properties of Desert Sand Concrete and Ordinary Concrete

Experimental Investigation on the Effect of Rubber Powder on Mechanical Properties of PVA Fiber Concrete

Experimental study on blast damage of RC T-beam bridge

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