Residual Axial Capacity of Reinforced Concrete Columns with Simulated Blast Damage

Li, Bing; Nair, Anand; Qian, Kai

doi:10.1061/(asce)cf.1943-5509.0000210

Cited by 50 publications

(11 citation statements)

References 7 publications

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“…A total of 108 people were killed, while 38 others were injured. This terrorist attack is perhaps the worst terrorist act in the history of the People's Republic of China (Li et al, 2012. ).…”

Section: The Shijiazhuang Bombings -2001mentioning

confidence: 99%

Near-Field Explosion Effects on Reinforced Concrete Columns: An Experimental Investigation

Siba¹

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Explosion effects on structures have been an area of research over the last decades. This is mainly due to the fact that structures all over the world are increasingly being exposed to the threat of premeditated explosive attacks, accidental explosions and other forms of explosion related failures. The magnitude of blast loads produced by most explosions are significantly higher than the design loads for conventional structural design.Consequently, this has increased awareness of building owners, government departments as well as design professionals to the vulnerabilities and survivability of structures to blast loading as global terrorist attacks continue at an increasing rate. Although significant amount of work is continuing on the effects of explosions on infrastructure (systems), especially in the USA, experimental work involving live explosive testing is limited. Moreover experimental testing of reinforced concrete columns to blast loading within the close-in range with scaled distance (z) less than 1.0 m/kg 1/3 is scant. This is likely because of the unreliable accuracy and low survivability of most instrumentation in this range. An experimental program was therefore designed to investigate the effects of near-field explosions on reinforced concrete columns with different transverse reinforcement detailing and at different scaled distances (z = 0.22 m/kg 1/3 , z = 0.54 m/kg 1/3 , and z = 0.86 m/kg 1/3 ). The columns were built in the Structures Laboratory at Carleton University, while the live explosive testing was carried out in an open field arena at the Canadian Forces Base (CFB) Petawawa, Ontario.Analysis of the experimental results showed that, the response of the reinforced concrete columns, irrespective of the column type (Conventional, Seismic or Prestressed) failed at ii the scaled distance of 0.22 m/kg 1/3 . As the scaled distance increases, the severity of damage is less. At the higher scaled distance of 0.86 m/kg 1/3 , the response for all columns was relatively the same. The effects of transverse detailing and lap splices was very much pronounced in tests with scaled distance z = 0.22 m/kg 1/3 . Conventional columns severed into two pieces, while seismic column did not. Prestressed columns performed better compared to conventional columns, at scaled distance of z = 0.22 m/kg 1/3 . However, in tests with scaled distances z = 0.54 m/kg 1/3 , the prestressed column suffered severe damage relative to conventional columns.iii

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Section: The Shijiazhuang Bombings -2001mentioning

confidence: 99%

Near-Field Explosion Effects on Reinforced Concrete Columns: An Experimental Investigation

Siba¹

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“…e BakerRisk test site in San Antonio [42] has a 0.75 m 2 (8 ft 2 ) target area in its normal configuration and can be configured to deliver a variety of blast pressure and impulse combinations with maximum possible peak pressure of 3 bar (45 psi) with a maximum impulse greater than 660 bar·ms (1000 psi ms). Shock tubes of similar construction and capability are blast load simulator (BLS) which are situated at the U.S. Army Corp of Engineers (USACE) Engineer Research and Development Centre (ERDC) in Vicksburg, Massachusetts, USA [10], at the University of Ottawa Blast Research Laboratory, Canada [46,50], at the testing ground of Swedish Defence Research Agency (FOI) in Marsta, Sweden [44], and at the Ernst-Mach-Institute in Freiburg, Germany [39]. Listed tubes are slightly different by their internal cross section near the test area and pressure levels exerted on test specimens but their work mode is very similar.…”

Section: Shockmentioning

confidence: 99%

An Overview of Methods for Blast Load Testing and Devices for Pressure Measurement

Draganić

Varevac

Lukić

2018

Advances in Civil Engineering

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A brief review of experimental methods for testing blast effects on structures is presented. Methods are classified in four groups: field tests, shock tubes, pendulum systems, and new techniques (blast simulator). Description of each method is given together with overall specification of possible instruments used in each test. In today’s modern era of computers which are becoming powerful tool implemented in all aspects of life and also scientific research, comparison of experimental and numerical techniques is also given. Comparison of data obtained from different experimental methods show that careful planning and execution leads to reliable results in terms of pressure, impulse, stress, and damage quantification.

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“…Some of the researches have been done in this field. Li et al (2012) experimentally investigated two specimen series (limited seismic and nonseismic) subjected to simulated blast loading and axial force [3]. In this study, hydraulic actuators were installed to reproduce predicted residual lateral deflection under blast loading and to apply the axial load and measure the residual axial capacity of the damaged columns.…”

Section: D=1-p R P Maxmentioning

confidence: 99%

Assessment of Empirical Formulas for Estimating Residual Axial Capacity of Blast Damaged Rc Columns

Omran¹,

Mollaei²

2017

EJSD

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Columns are the most important load bearing structural elements in buildings. Under the effect of external explosions near the building, columns in the ground and first floors may have severe damage that can cause progressive collapse of the whole building frames. Residual axial load bearing capacity of the reinforced concrete column after the effect of lateral blast loading could be a practical criterion to damage assessment of the column. This is essential to determine whether the column has to be replaced or repaired for future use. In this paper, residual axial capacity of the square RC columns under the effect of initial axial force and lateral blast loading is investigated. Explicit finite element package LS-DYNA is used for analysis of the considered models and determining their residual capacity. There are some empirical formulas for estimating of the residual axial capacity of the blast damaged RC columns including Bao and Li (2010), Wu et al (2010) and Arlery et al (2013). Here, FEM results are compared to the estimations of these formulas. Different levels of initial axial force in the columns and different scale distances of blast loading are considered.

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Residual Axial Capacity of Reinforced Concrete Columns with Simulated Blast Damage

Abstract: Residual axial capacity of reinforced concrete columns with simulated blast damage

Cited by 50 publications

References 7 publications

Near-Field Explosion Effects on Reinforced Concrete Columns: An Experimental Investigation

Near-Field Explosion Effects on Reinforced Concrete Columns: An Experimental Investigation

An Overview of Methods for Blast Load Testing and Devices for Pressure Measurement

Assessment of Empirical Formulas for Estimating Residual Axial Capacity of Blast Damaged Rc Columns

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