Improved SDOF and numerical approach to study the dynamic response of reinforced concrete columns subjected to close-in blast loading

Liu, Yan; Yan, Junbo; Li, Zhen; Huang, Fenglei

doi:10.1016/j.istruc.2019.08.014

Cited by 40 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In all three cases, bending deformation occurs at the column, but the position of the crack formation differs. Liu et al [68] performed a parametric analysis in LS-Dyna to determine the influence of longitudinal and transverse reinforcement ratios, longitudinal force, and boundary conditions. They concluded that at smaller-scaled distances, the increase in transverse and longitudinal reinforcement reduces the displacement in the middle of the column.…”

Section: Parametersmentioning

confidence: 99%

Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

View full text Add to dashboard Cite

The ever-present threat of terrorist attacks in recent decades gives way to research towards blast-resistant design of structures. Columns, as one of the main load-bearing elements in residential buildings and bridges, are becoming interesting targets in bombing attacks. Research of column blast load behavior leads toward increased safety by identifying shortcomings and problems of those elements and acting accordingly. Field tests and numerical simulations lead to the development of new blast load mitigation technics, either in the design process or as a retrofit and strengthening of existing elements. The article provides a state-of-the-art literature review of filed blast load tests and numerical simulations of a bridge and building columns.

show abstract

Section: Parametersmentioning

confidence: 99%

Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…These results clearly indicate that the assumption of neglecting axial load would lead to conservative predictions of column responses to blast load is not necessarily correct. It should be noted that although the aforementioned studies (Chen et al, 2019;Liu et al, 2019) did take into account axial load effects, the investigations focused on RC columns in building structures rather than RC bridge columns, the ALR were 0.2, 0.4, 0.6, and 1.0 in Chen et al (2019) and 0.2, 0.4, 0.6 in Liu et al (2019). However, unlike columns in buildings which typically experience service loads above their balance point, RC bridge columns typically sustain in-service axial loads that are below their balance point on an interaction diagram of axial force and bending moment.…”

Section: Introductionmentioning

confidence: 98%

“…At the scaled distance of 0.4 m/kg 1/3 , there exists an ALR limit of 0.4, above which the failure of column suffers from the compression-shear failure. Liu et al (2019) investigated the blast performance of RC columns under the combined action of axial load and close-in explosion experimentally, the results showed that when the scaled distance was relatively large, the columns with higher axial loads suffered less damage than columns with smaller axial loads under the same loading scenario. With the decrease of the scaled distances, the axial load increased the level of damage to RC columns.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of axial load effects on RC bridge columns under blast loading

Yuan

Hao

Zong

et al. 2020

Advances in Structural Engineering

View full text Add to dashboard Cite

Blast load and its effects on transportation infrastructure especially bridge structures have received considerable attention in recent years. The RC bridge columns are considered as the most critical structural members because their failure leads to collapse of the bridge. Although RC bridge columns are typical axial load-carrying components, the studies on blast-resistant capacity of RC bridge columns usually neglect the axial load effect since it is commonly assumed that neglecting the axial load leads to conservative predictions of column responses. This assumption is true when column failure is governed by flexural response since axial compressive load generates a prestress in column which compensates concrete tensile stress induced by bending response. When subjected to blast loads, column response however could be governed by shear response. In this case neglecting axial loading effect does not necessarily lead to conservative predictions of column responses. In this study, high-fidelity finite element (FE) models for both non-contact explosion and contact explosion were developed in LS-DYNA. The FE models were validated with field blast test data. Subsequently, intensive simulations of the RC bridge columns with and without axial load subjected to a wider range of blast loading scenarios, including far-field, near-field and contact explosion were conducted. The influence of axial load on the dynamic performance of RC bridge columns corresponding to different blast loading scenarios was discussed.

show abstract

“…Jiang [10] simulated the change of blasting dynamic load by changing the stress-strain relationship. Liu and Wang proposed e ective models for calculation of the equivalent uniform blast load for non-uniform blast load using the equivalent singledegree-of-freedom (SDOF) approach [11,12].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Blasting Excavation for High Rock Slope of Highway Reconstruction and Expansion

Zhao

Zhang

Huo

et al. 2022

Advances in Civil Engineering

View full text Add to dashboard Cite

To analyze the stability of high rock slopes under millisecond blasting in the paper, time-history curves of millisecond blasting dynamic loads are established based on field data from the reconstruction and extension project of the Beijing-Shanghai Highway. Numerical simulations and field monitoring data are used to study the dynamic response characteristics of the slope stress, displacement, velocity, and safety factor at different times. The results show that the local shear stress near the blasting area is greater than the shear strength of the rock mass, which has a good effect on precracking. Additionally, the peak vibration law of the particles near the blasting area is found to change synchronously with the application of the dynamic blast load; as the distance increases, the law gradually weakens and peak vibration occurs only near the maximum value. Moreover, the safety factor of the slope exhibits a decreasing periodic variation. When the dynamic blast load F reaches the maximum load Fmax and 0.6 Fmax, the corresponding safety factor reaches the minimum load.

show abstract

Improved SDOF and numerical approach to study the dynamic response of reinforced concrete columns subjected to close-in blast loading

Cited by 40 publications

References 16 publications

Blast Loaded Columns—State of the Art Review

Blast Loaded Columns—State of the Art Review

Numerical analysis of axial load effects on RC bridge columns under blast loading

Stability Analysis of Blasting Excavation for High Rock Slope of Highway Reconstruction and Expansion

Contact Info

Product

Resources

About