Finite element analysis on strengthening effect of the UHPFRC-steel composite deck

2021 ◽  
pp. 604-604
Author(s):  
C.H. Ma ◽  
P.R. Deng ◽  
T. Matsumoto ◽  
K. Ueda ◽  
H. Mitamura
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strengthening Effect ◽  
Element Analysis ◽  
Steel Composite

Simplified calculation model for load-bearing cold-formed steel composite walls under fire conditions

2020 ◽  
Vol 23 (8) ◽  
pp. 1683-1701
Author(s):  
Wenwen Chen ◽  
Jihong Ye
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Calculation Model ◽  
Fire Performance ◽  
Element Analysis ◽  
Lateral Deflection ◽  
Steel Composite ◽  
Cold Formed Steel ◽  
Composite Walls ◽  
Simplified Calculation

The conventional simplified model only restricts the bending buckling around the minor axis and overall torsional buckling, which is not suitable for external sandwiched cold-formed steel composite walls. Moreover, a solution to stud–track connections must be achieved in establishing the overall structure model. In this article, a simplified calculation model is proposed to accurately and efficiently reveal the fire performance of cold-formed steel composite walls. A tension spring is adopted to simulate the boundary condition that limits the axial thermal expansion of the studs at elevated temperature. Meanwhile, the simplified applications of the panel constraints and stud–track connections are also given in details. Finite element analysis using the developed simplified calculation model is conducted to simulate five full-scale cold-formed steel composite walls with different configurations. Comparisons between the finite element analysis and fire test results show an overall agreement on the failure modes, cold flange temperatures and lateral deflections at mid-height of the studs. These results demonstrate that the developed simplified calculation model is able to simulate the fire performance and predict the lateral deflection of the external sandwiched cold-formed steel composite walls accurately. Finally, the key factors affecting the lateral deflection of the studs are analysed.

scholarly journals Experiment Study and Finite Element Analysis of the Coupling Effect of Steel Fiber Length and Coarse Aggregate Maximum Size on the Fracture Properties of Concrete

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 850
Author(s):  
Juhong Han ◽  
Dingcheng Huang ◽  
Jingyu Chen ◽  
Xiaofang Lan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fiber Length ◽  
Coarse Aggregate ◽  
Steel Fiber ◽  
Coupling Effect ◽  
Maximum Size ◽  
Fiber Reinforced Concrete ◽  
Strengthening Effect ◽  
Element Analysis

The effects of steel fiber length (lf = 30 mm, 40 mm, 50 mm and 60 mm) and coarse aggregate maximum size (Dmax = 10 mm, 20 mm, 30 mm and 40 mm) on fractural properties of steel fiber reinforced concrete (SFRC) was investigated. The results show that the fracture energy (Gf) of SFRC reaches its maximum when Dmax increases to 30 mm, and it increases first and then decreases as lf increases, but it still has a significant increase compared to the control concrete. The Gf ratio increases first and then decreases as the lf/Dmax increases. The Gf of the SFRC fracture surface follows the same trend as the fractal dimension. The rational range of the lf/Dmax is 2.5–4 for the considerable strengthening effect of steel fiber on fracture performances of concrete with the Dmax of 10 mm and 20 mm and 1.5–2.33 for that concrete with the Dmax of 30 mm and 40 mm. The finite element analysis results are compared with the experimental results, and the results show that the fracture process of the finite element model is consistent with the experiment.

Seismic Behavior Analysis and Seismic Strengthening of Corner Joints without Seismic Details

2010 ◽  
Vol 163-167 ◽  
pp. 3972-3976
Author(s):  
Hai Yan Zhang ◽  
Jing Duan ◽  
Xiao Mei Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Failure Process ◽  
Strengthening Effect ◽  
Element Analysis ◽  
Ductility Factor ◽  
Ultimate Displacement

Seismic performance of corner joints without seismic details was analyzed by software ABAQUS, the results indicated that the reinforcement ration of the girders has great effects on the failure process and seismic behavior of corner joints. Beam Haunch Method was used to strengthen these joints, and then finite element analysis was conducted for the joints with unidirectional haunched beam (UHB)and bidirectional haunched beams(BHB). It was found that the bearing capacity of joints was significantly improved but the ultimate displacement and ductility factor were slightly affected by the haunch strengthening. The strengthening effect of bidirectional haunch was obviously superior to that of unidirectional haunch.

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