Experimental investigation on the structural response of RC slabs subjected to combined fire and blast

Colombo, M.; Martinelli, Paolo; Arano, Assis; Øverli, Jan Arve; Hendriks, Max A.N.; Kanstad, Terje; Prisco, Marco di

doi:10.1016/j.istruc.2021.02.029

Cited by 17 publications

(9 citation statements)

References 45 publications

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“…The specimen size and reinforcement layout were dictated by the dimensions of the equipment used for the dynamic experimental testing part of the program, which is reported in Colombo et al 45 …”

Section: Methodsmentioning

confidence: 99%

“…(i) the mechanical characterization of concrete at high temperatures, 23 (ii) the impact of the combination of fire and static loading on RC circular slabs (present study), and (iii) the impact of the combination of fire and dynamic loading on RC circular slabs. 45 The findings will make it possible to do the risk analysis and the feasibility study for the SFT in the E39 project.…”

Section: Introductionmentioning

confidence: 97%

“…A first and fundamental step is to achieve a full understanding of slab behavior at elevated temperatures under static loading conditions. The following experimental program consisting of three phases was therefore defined to investigate: (i) the mechanical characterization of concrete at high temperatures, 23 (ii) the impact of the combination of fire and static loading on RC circular slabs (present study), and (iii) the impact of the combination of fire and dynamic loading on RC circular slabs 45 . The findings will make it possible to do the risk analysis and the feasibility study for the SFT in the E39 project.…”

Section: Introductionmentioning

confidence: 99%

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Failure characteristics of reinforced concrete circular slabs subsequently subjected to fire exposure and static load: An experimental study

Barenys

Colombo

Martinelli

et al. 2022

Structural Concrete

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This study investigated the effect of fire on the ultimate load‐bearing capacity of reinforced concrete (RC) slabs. The structural response of RC circular specimens subjected to static load conditions after exposure to a hydrocarbon fire on one side of the specimen was examined. Two fire exposure times were considered (60 and 120 min) in addition to reference non‐exposed specimens. The static response was evaluated in the damaged specimens in residual conditions after natural cooling from the elevated temperatures. The temperature distribution across the thickness of the slabs and their load–displacement response was measured. The decrease in the stiffness of the slabs due to the thermal exposure was studied by means of direct ultrasonic pulse velocity (UPV) measurements made before and after the fire tests. The decrease in global stiffness was partially accounted for by UPV measurements. The experimental results showed two peaks in the load‐deflection response of the slabs. The first peak was related to an arching mechanism introduced by the specific set‐up used. The second peak, corresponding to the ultimate load, occurred due to tensile membrane action at large deflections. While the former was strongly affected by the fire exposure, with the load being halved after the 120‐min exposure, the latter was not greatly affected by either the presence of fire or the exposure time. Simplified mechanical models were used to explain the behavior of the RC slabs during the tests.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Failure characteristics of reinforced concrete circular slabs subsequently subjected to fire exposure and static load: An experimental study

Barenys

Colombo

Martinelli

et al. 2022

Structural Concrete

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“…As an increasingly used material for structural purpose, 31 especially after its inclusion in the fib Model Code 2010 32 as structural material, fiber-reinforced concrete (FRC) can offer significant benefits in terms of different properties such as cracking control, [33][34][35] fire and blast resistance, [36][37][38][39][40] fatigue, [41][42][43] redistribution capacity, 44 and impact resistance. 45 As such, FRC is entering the latest generation of design codes such as the new Eurocode 2 revision 46 and the fib Model Code 2020.…”

Section: A Materials Application Of the Fib Repository: Residual Flex...mentioning

confidence: 99%

Rethinking databases: The fib project for a connected data repository

Fernández-Ordóñez

Ruiz

Tošić

et al. 2023

Structural Concrete

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The need for reliable test data to verify scientific theories together with the necessity to calibrate code‐oriented expressions and their level of safety have pushed researchers to develop test databases. Such databases collect the work of multiple independent scientific initiatives compiling experimental evidences on similar test configurations but with different parameters such as geometry, size of the component tested, boundary conditions, and/or mechanical properties of the materials. Such databases, usually collected for specific purposes, have traditionally faced maintenance, and especially consistency issues. Also, they have given rise to conflicting values due to different interpretations of the same data entries in databases elaborated by different researchers. In addition, such databases are frequently designed and configured to serve for one purpose, although their data could be used in multiple manners. Recent developments regarding machine learning and artificial intelligence have opened the door to exploiting historically collected test results by data mining techniques. In an effort to improve the current situation concerning databases, the fib has launched a wide and open initiative on test data management. It consists of a common data structure, sufficiently flexible to serve for multiple purposes, hosting very different test setups, and meant to be used for cross analyses of data. This allows reusing data originally developed for one purpose to analyze other aspects, enhancing the value of current experimental work. Also, a consistent management structure is defined taking advantage of the fib network, with database editors, collectors and users, allowing for a transparent and documented peer‐review process while incorporating new test data. This paper presents the main basis grounding the test data management as well as details on the first two completed applications, referring to fiber‐reinforced concrete (material data) and to punching of slab‐column connections (structural response), showcasing the framework versatility and universality.

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“…In addition, Wang [16], Sha [17], Soltani [18], Daneshvar [19], and Colombo [20] also studied the deformation and failure state of concrete components under impact load through experimental methods.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

Wang

Liu

Xiao

et al. 2021

Shock and Vibration

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Reinforced concrete (RC) slab is an important component in civil construction and protection engineering, and its dynamic response under impact loading is a complex mechanical problem, especially for two or multiple continuous impact loads. In this paper, a series of drop hammer impact tests were carried out to investigate the dynamic response of RC slabs with two successive impacts. The time history of impact force and the failure characteristic of the slab surface were recorded. Moreover, four influence factors, including slab thickness, reinforcement ratio, impact location, and drop hammer height have been discussed. Besides, a 3D numerical model based on the finite element method (FEM) was established to expand the research of constrained force, deflection, and vertical stress of an RC slab. The results show that increasing the slab thickness and reinforcement ratio can improve the impact resistance of an RC slab. The impact point location and drop hammer height have a great influence on the dynamic response of the RC slab. In addition, the RC slab will have more obvious damage under the second impact, but the dynamic response becomes weaker. It may be because of the local damage in the concrete caused by the first impact that would weaken the propagation of vibration.

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Experimental investigation on the structural response of RC slabs subjected to combined fire and blast

Cited by 17 publications

References 45 publications

Failure characteristics of reinforced concrete circular slabs subsequently subjected to fire exposure and static load: An experimental study

Failure characteristics of reinforced concrete circular slabs subsequently subjected to fire exposure and static load: An experimental study

Rethinking databases: The fib project for a connected data repository

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

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