Concrete pry-out failure of single headed stud anchors after fire exposure: Experimental and numerical study

2021 ◽  
Vol 232 ◽  
pp. 111816
Author(s):  
Kaipei Tian ◽  
Joško Ožbolt
Keyword(s):  
Numerical Study ◽  
Fire Exposure ◽  
Headed Stud

Experimental and numerical study on compressive performance of perforated brick masonry after fire exposure

2018 ◽  
Vol 43 (2) ◽  
pp. 200-218 ◽  
Author(s):  
Jin Zhang ◽  
Qiang Zhang ◽  
Donghao Zhang ◽  
Qingfeng Xu ◽  
Weibin Li
Keyword(s):  
Numerical Study ◽  
Brick Masonry ◽  
Fire Exposure ◽  
Compressive Performance

Experimental study on concrete edge failure of single headed stud anchors after fire exposure

2018 ◽  
Vol 96 ◽  
pp. 176-188 ◽  
Author(s):  
Kaipei Tian ◽  
Joško Ožbolt ◽  
Akanshu Sharma ◽  
Jan Hofmann
Keyword(s):  
Experimental Study ◽  
Fire Exposure ◽  
Edge Failure ◽  
Headed Stud

scholarly journals Behavior of RC Beams Strengthened with NSM-CFRP Strips Subjected to Fire Exposure: A Numerical Study

2021 ◽  
Vol 11 (6) ◽  
pp. 7782-7787
Author(s):  
H. A. Al-Baghdadi ◽  
A. Sabah
Keyword(s):  
Numerical Study ◽  
Numerical Models ◽  
Fire Behavior ◽  
Three Dimensional ◽  
Structural Response ◽  
Rc Beams ◽  
Fire Exposure ◽  
Efficient Technology ◽  
Near Surface ◽  
Endurance Tests

The use of Near-Surface Mounted (NSM) Carbon-Fiber-Reinforced Polymer (CFRP) strips is an efficient technology for increasing flexural and shear strength or for repairing damaged Reinforced Concrete (RC) members. This strengthening method is a promising technology. However, the thin layer of concrete covering the NSM-CFRP strips is not adequate to resist heat effect when directly exposed to a fire or at a high temperature. There is clear evidence that the strength and stiffness of CFRPs severely deteriorate at high temperatures. Therefore, in terms of fire resistance, the NSM technique has a significant defect. Thus, it is very important to develop a set of efficient fire protection systems to overcome these disadvantages. This paper presents a numerical study that investigates the fire behavior of thermally insulated RC beams flexurally strengthened with NSM-CFRP strips and subjected to fire exposure according to the ISO 834 standard. The numerical study considered three-dimensional finite element models in the ABAQUS software that have been developed to simulate and predict the performance (thermal and structural response) of fire endurance tests on strengthened, uninsulated strengthened, and thermally insulated beams strengthened with NSM-CFRP strips, which were exposed to fire and had different fire insulation schemes. The insulation used was plaster from local material with a thickness range of 25 to 50mm. The variation of the thermal and mechanical properties with the temperature of the constituent materials was considered. All beams' mechanical and thermal responses were adequately simulated using numerical models. The results of the numerical simulations were in good agreement with the experimental data. The fire behavior of the NSM-CFRP strengthened RC beams was examined and particularly the efficiency of the NSM strengthening system during the fire. The behavior in the fire of the NSM-CFRP strengthening system on the RC beams thermally protected with different fire insulation schemes was assessed. Finally, the effectiveness of fire insulation was studied.

scholarly journals Strength Capacity and Failure Mode of Shear Connectors Suitable for Composite Cold Formed Steel Beams: Numerical Study

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3627
Author(s):  
Sherif A. Elsawaf ◽  
Saleh O. Bamaga
Keyword(s):  
Numerical Model ◽  
Failure Mode ◽  
Numerical Study ◽  
Steel Beams ◽  
Composite Action ◽  
Shear Connectors ◽  
Strength Capacity ◽  
Cold Formed Steel ◽  
Headed Stud ◽  
Channel Beam

In this paper, the findings of numerical modeling of the composite action between normal concrete and Cold-Formed Steel (CFS) beams are presented. To obtain comprehensive structural behavior, the numerical model was designed using 3-D brick components. The simulation results were correlated to the experimental results of eight push tests, using three types of innovative shear connectors in addition to standard headed stud shear connectors, with two different thicknesses of a CFS channel beam. The proposed numerical model was found to be capable of simulating the failure mode of the push test as well as the behavior of shear connectors in order to provide composite action between the cold-formed steel beam and concrete using the concrete damaged plasticity model.

Numerical Study of the Behavior of Reinforced Concrete Shear Walls during Fire Exposure

2011 ◽  
Vol 101-102 ◽  
pp. 644-647
Author(s):  
Gui Rong Liu ◽  
Fu Lai Qu ◽  
Yu Pu Song ◽  
Chang Yong Li
Keyword(s):  
Reinforced Concrete ◽  
Geometric Nonlinearity ◽  
Numerical Study ◽  
Shear Walls ◽  
Order Effect ◽  
Structural Behavior ◽  
Fire Exposure ◽  
Simple Method ◽  
Axial Forces ◽  
Sectional Analysis

A simple method based on the well-known sectional analysis approach is presented to trace the structural behavior of reinforced concrete (RC) shear walls exposed to fire. It is similar to the approaches described in the existing literature but it does not require computations of moment-curvature curve group. This method can take into account material nonlinearity by use of the coupling constitutive relation of materials. Moreover, the geometric nonlinearity is considered by taking account the second-order effect of axial forces. The predictions of the proposed method are validated using experimental and analytical studies.

Concrete edge failure of single headed stud anchors exposed to fire and loaded in shear: Experimental and numerical study

2018 ◽  
Vol 100 ◽  
pp. 32-44 ◽  
Author(s):  
Kaipei Tian ◽  
Joško Ožbolt ◽  
Goran Periškić ◽  
Jan Hofmann
Keyword(s):  
Numerical Study ◽  
Edge Failure ◽  
Headed Stud

Numerical study of the low-frequency atomic dynamics in a Lennard-Jones glass

1998 ◽  
Vol 77 (2) ◽  
pp. 473-484 ◽  
Author(s):  
M. Sampoli, P. Benassi, R. Dell'Anna,
Keyword(s):  
Numerical Study ◽  
Low Frequency ◽  
Lennard Jones
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