Numerical Study on Damage Mechanism of PRC T-Beam under Close-In Blast Loading

2015 ◽  
Vol 730 ◽  
pp. 55-64 ◽  
Author(s):  
Bo Yan ◽  
Yu Hui Zhou ◽  
Fei Liu ◽  
Zhi Gang Jiang
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Blast Loading ◽  
Damage Mechanism ◽  
Rc Beam ◽  
Damage Mode ◽  
Damage Process ◽  
Bridge Damage ◽  
T Beam ◽  
Beam Damage

The RC beam damage induced by blast loading might lead to partial or total collapse of bridges. Improved understanding of damage mechanism of the RC beam under blast loading helps advances in the analysis and assessment of bridge damage effects. In this paper, the damage mechanism of prestressed reinforced concrete (PRC) T-beam under close-in blast loading is investigated numerically with a three-dimensional numerical model. The model is validated by comparing simulating results with the experimental data reported by other researchers. Intensive numerical simulations are then carried out to reproduce the damage process of the T-beam as well as to investigate the damage mode and mechanism of the PRC T-beam components.

An Interfacial Debonding Model for Particle-Reinforced Composites

2002 ◽  
Author(s):  
H. T. Liu ◽  
L. Z. Sun ◽  
J. W. Ju
Keyword(s):  
Volume Fraction ◽  
Three Dimensional ◽  
Damage Mechanism ◽  
Interfacial Debonding ◽  
Elastic Behavior ◽  
Reinforced Composites ◽  
Stiffness Tensor ◽  
Particle Reinforced Composites ◽  
Damage Process ◽  
Multi Phase

To simulate the evolution process of interfacial debonding between particle and matrix, and to further estimate its effect on the overall elastic behavior of particle-reinforced composites, a two-level microstructural-effective damaged model is developed. The microstructural damage mechanism is governed by the interfacial debonding of reinforcement and matrix. The progressive damage process is represented by the debonding angles that are dependent on the external loads. For those debonded particles, the elastic equivalency is constructed in terms of the stiffness tensor. Namely, the isotropic yet debonded particles are replaced by the orthotropic perfect particles. The volume fraction evolution of debonded particles is characterized by the Weibull’s statistical approach. Mori-Tanaka’s method is utilized to determine the effective stiffness tensor of the resultant multi-phase composites. The proposed constitutive framework is developed under the general three-dimensional loading condition. Examples are conducted to demonstrate the capability of the proposed model.

scholarly journals Dynamic response and damage analysis of steel box wall under internal blast loading

2019 ◽  
Vol 11 (1) ◽  
pp. 168781401882260
Author(s):  
Duo Zhang ◽  
Shujian Yao ◽  
Fangyun Lu ◽  
Jiangjie Song ◽  
Yuqing Ding
Keyword(s):  
Numerical Methods ◽  
Dynamic Response ◽  
Plate Thickness ◽  
Blast Loading ◽  
Damage Mechanism ◽  
Dimensionless Number ◽  
Damage Mode ◽  
Two Dimensional ◽  
Box Models ◽  
Internal Blast Loading

Different loading conditions, different structural dimensions, or different structural materials will lead to different damage results. In this study, blast experiment of steel box model under internal explosion was conducted and the numerical methods are validated through comparison of experimental and numerical results. Then, a series of multi-box models were built, and a large number of numerical simulations considering two kinds of steel, different plate thickness ranging from 0.005 to 0.025 m, and different TNT explosive mass ranging from 5 to 2000 kg were carried out using the validated numerical methods. Two damage modes, convex damage and concave damage, were observed. The dynamic response and damage mechanism were analyzed, and the results show that the different damage modes of the first wall will lead to different damage results of the second wall. Through dimensional analysis, a two-dimensional dimensionless number for internal blast analysis was suggested. Clear physical meanings are conveyed in the dimensionless number. After that, prediction of the damage modes was studied using the proposed dimensionless number. A damage mode map was plotted based on the two-dimensional dimensionless number, and an empirical equation for rapid prediction of damage mode of steel box wall under internal blast loading is proposed.

Biomechanical model of the thorax under blast loading: a three dimensional numerical study

2014 ◽  
Vol 30 (12) ◽  
pp. 1667-1678 ◽  
Author(s):  
Aristide Awoukeng Goumtcha ◽  
Karine Thoral-Pierre ◽  
Sébastien Roth
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Blast Loading ◽  
Biomechanical Model

scholarly journals Numerical study on the flexural performance of RC beams with externally bonded CFRP sheets

2021 ◽  
Vol 15 (4) ◽  
pp. 182-196
Author(s):  
Nguyen Ngoc Tan ◽  
Nguyen Trung Kien ◽  
Nguyen Hoang Giang
Keyword(s):  
Failure Modes ◽  
Numerical Study ◽  
Three Dimensional ◽  
Fe Model ◽  
Rc Beam ◽  
Interfacial Behavior ◽  
Flexural Strengthening ◽  
Cfrp Sheets ◽  
Flexural Performance ◽  
Externally Bonded

The numerical investigations on the structural performance of reinforced concrete (RC) beam strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) sheets are presented. The nonlinear characteristics of materials (i.e., stress-strain relationships of steel reinforcement, concrete, CFRP, and CFRP/concrete bond stress-slip behavior) were adopted in three-dimensional finite element (FE) models. The validation of FE models was conducted by comparing the laboratory works carried out on two RC beam specimens with 2000 mm length, 300 mm height, and 120 mm width. The numerical results show a good correlation with the experimental results of the beam specimens, such as load-displacement curves, crack patterns, and failure modes. They allow confirming the capability of the developed FE model to predict the flexural performance of strengthened beams considering CFRP/concrete interfacial behavior. Furthermore, parametric investigations were performed to determine the effect of flexural strengthening schemes, CFRP length with or without U-wraps, and multiple CFRP layers on the flexural performance of strengthened beams.

Numerical study on damage mechanism of RC beams under close-in blast loading

2015 ◽  
Vol 51 ◽  
pp. 9-19 ◽  
Author(s):  
Bo Yan ◽  
Fei Liu ◽  
DianYi Song ◽  
ZhiGang Jiang
Keyword(s):  
Numerical Study ◽  
Blast Loading ◽  
Damage Mechanism ◽  
Rc Beams

Study on Damage Effect of Concrete Bridge Model under Blast Loading

2015 ◽  
Vol 777 ◽  
pp. 116-120 ◽  
Author(s):  
Lei Chen ◽  
Tian Hua Jiang ◽  
Jie Gong ◽  
Lu Jun Cai
Keyword(s):  
Rapid Development ◽  
Blast Loading ◽  
Damage Effect ◽  
Bridge Structure ◽  
Bridge Model ◽  
Bridge Damage ◽  
Beam Bridge ◽  
The Impact ◽  
T Beam ◽  
Damage Rule

With the rapid development of transportation, the vulnerability of bridge under blast loading has more and more attracted people's attention. To ensure the safety of the bridge under the impact of blast loading is very important. This article describes the current situation of bridge structure antiknock research in China and other countries. What’s more, pointed out the shortcomings of existing research and presented that the antiknock research of bridge structure should combine numerical simulation with model test at the same time. This article researches the stress, strain and bridge damage rule of 1: 5 model of T-beam Bridge under explosion effect of small doses explosive.

EXPERIMENTAL AND NUMERICAL STUDY OF THREE-DIMENSIONAL NATURAL CONVECTION AND FREEZING IN WATER

1994 ◽  
Author(s):  
C. Abegg ◽  
Graham de Vahl Davis ◽  
W.J. Hiller ◽  
St. Koch ◽  
Tomasz A. Kowalewski ◽  
...  
Keyword(s):  
Natural Convection ◽  
Numerical Study ◽  
Three Dimensional
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