Dynamic behavior and damage mechanisms of reinforced concrete piers subjected to truck impact

Zhao, Wuchao; Ye, Jihong; Jia, Qingxuan

doi:10.1016/j.engfailanal.2020.105158

Cited by 31 publications

(4 citation statements)

References 42 publications

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“…However, the strain rate sensitivity coefficient C cannot accurately measure the strain rate sensitivity of materials. In order to better reflect the difference of material strain rate effect in different strain rate range, this paper uses the CS model [25][26][27] to obtain a relationship between the dynamic stress and strain rate of the material, which is expressed as:…”

Section: J-c Constitutive Model and Dynamic Mechanical Characterizationmentioning

confidence: 99%

Dynamic Mechanical Properties and Constitutive Model of Selective Laser Melting 316L Stainless Steel at Different Scanning Speeds

Lei

Liu

et al. 2021

Preprint

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A 316L stainless steel material is widely used in the design of impact-resistant structures. Using selective laser melting (SLM) technology to form 316L stainless steel to study its mechanical behavior under dynamic loading is vital to improve the service performance of this product. This study investigates the dynamic compression mechanical properties and the constitutive models of 316L stainless steel specimens formed at different scanning speeds. The quasi-static and dynamic compression mechanical properties of SLM316L stainless steel specimens formed at four scanning speeds were tested using an electro-hydraulic servo experimental system and split Hopkinson pressure bar experimental apparatus. Microstructure observation was used to analyze the differences in the mechanical properties of specimens with different forming parameters. Finally, the modified Johnson-Cook (J-C) constitutive model was established and compared with the experimental data to illustrate the applicability of the modified model in describing the dynamic mechanical properties of SLM316l stainless steel. In dynamic compression mechanics experiments, the results show that SLM316L stainless steel specimens exhibit typical viscoplastic characteristics and significant strain rate strengthening effects. Furthermore, the scanning speed significantly affects the stacking characteristics of SLM-formed specimens, and the yield strength in axial compression decreases with the loss of stacking characteristics. Finally, the modified J-C model can accurately describe the mechanical properties of SLM316l stainless steel. This study can provide a theoretical model and methodological support for the design and development of SLM316l stainless steel.

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Section: J-c Constitutive Model and Dynamic Mechanical Characterizationmentioning

confidence: 99%

Dynamic Mechanical Properties and Constitutive Model of Selective Laser Melting 316L Stainless Steel at Different Scanning Speeds

Lei

Liu

et al. 2021

Preprint

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“…rockfall rolling impact, floating ice impact, vehicle and vessel collision, etc. These accidents have caused a large number of casualties and economic losses (Li et al, 2020; Chen et al, 2021; Zhao et al, 2021). At present, normal concrete (NC) is still used in most projects, which makes the RC structure vulnerable to brittle failure under impact loads, and even leads to the overall collapse of the structure.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of the ultra high performance concrete composite beam subjected to impact loads

Pei

Zeng

et al. 2023

Advances in Structural Engineering

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Ultra High Performance Concrete (UHPC) has gradually become the most promising high-performance material, and has achieved good results in the field of impact and explosion protection engineering. In general, normal reinforced concrete (NC) beams subjected to impact load are prone to local punching shear failure. Although pure UHPC beams can improve their impact performance, their further application is limited by the high cost. In order to achieve the balance between impact resistance and economy, this study puts forward the design scheme of local replacement and wrapping with UHPC to improve the impact resistance of reinforced concrete beams. In this work, the different research conditions including NC beam, UHPC beam and NC-UHPC composite beam are designed, and the impact resistance of specimens is compared and analyzed. The results show that UHPC local replacement scheme can effectively avoid local punching shear failure of beams. As for the UHPC wrapping scheme, the failure mode of the beam changes from punching shear failure to bending failure. Compared with NC beams, two schemes can effectively reduce the peak displacement and residual displacement in the mid-span. The peak displacement and residual displacement in the mid-span of the UHPC local replacement beam are smaller than that of UHPC wrapping schemes, and the mid-span bearing capacity is better. In this work, it is recommended to take a local replacement length greater than 2 times the beam height to avoid local punching shear failure.

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“…Today, some of the most widely used concrete material models which include parameter generators are the Karagozian and Case (K&C) concrete model - Release III (Magellanes et al, 2010; Malvar et al, 1997), the continuous surface cap model (CSCM) (Murray, 2007; Zhao et al, 2021), and the Riedel–Hiermaier–Thoma (RHT) model (Grunwald et al, 2017; Riedel et al, 2009). All three models are readily available as standard models in the explicit finite element (FE) code LS-DYNA (LST, 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of automatic versus material test-based calibrations of concrete models for ballistic impact simulations

Antoniou

Kristoffersen

2023

International Journal of Protective Structures

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Concrete is used for protective structures all over the world. Accurate response estimates to a given threat is vital for designing such structures. Concrete models often require numerous input parameters for which sufficient experimental data can be challenging to obtain. Some models are accompanied by parameter generators which use the unconfined compression strength to extrapolate the remainder of the parameters based on experimental databases. This study investigates simulation of ballistic impact on high-strength concrete with 75 MPa nominal unconfined cylindrical compressive strength. The first objective is to investigate the accuracy parameter generators to produce input data for commonly used concrete material models. The second objective is to establish and evaluate a simplified parameter calibration procedure based on standard material experiments and data from the literature. The results employing parameter generators varied notably between the models while still giving decent ballpark estimates. The parameters obtained from inverse modelling of standardized material tests improved the results significantly. The findings of this study recommend caution when using automatic parameter generators. Although a detailed calibration of these concrete models is complicated, a simplified calibration gives reasonable predictions, making this the advisable approach for designing concrete protective structures.

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Dynamic behavior and damage mechanisms of reinforced concrete piers subjected to truck impact

Cited by 31 publications

References 42 publications

Dynamic Mechanical Properties and Constitutive Model of Selective Laser Melting 316L Stainless Steel at Different Scanning Speeds

Dynamic Mechanical Properties and Constitutive Model of Selective Laser Melting 316L Stainless Steel at Different Scanning Speeds

Performance analysis of the ultra high performance concrete composite beam subjected to impact loads

Evaluation of automatic versus material test-based calibrations of concrete models for ballistic impact simulations

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