The Seismic Behavior of High-Strength Concrete Frame Joints

2012 ◽  
Vol 238 ◽  
pp. 838-843 ◽  
Author(s):  
Ting Yan Wang ◽  
Jun Wei Zhang ◽  
Dan Ying Gao
Keyword(s):  
High Strength Concrete ◽  
Seismic Behavior ◽  
Steel Fiber ◽  
High Strength ◽  
Element Analysis ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Loading Method ◽  
Reversed Loading ◽  
Joint Core Area

By studying the two high-strength concrete frame joints by means of experimental investigate and finite element analysis with the low cycle reversed loading method, it discussed the influence of the steel fiber on the seismic behavior of the high-strength frame joints. The result shows that, mixed with steel fiber can enhance the constraint of the concrete at the joint core area, improve the seismic behavior. Amount of steel fiber can replace part of the stirrup.

scholarly journals Seismic Behavior Analysis of Damaged Steel Fiber-Reinforced High-Strength Concrete Frame Joints Strengthened by FRP

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Wang Tingyan ◽  
Zhou Yun ◽  
Zhang Junwei
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Steel Fiber ◽  
High Strength ◽  
Fiber Reinforced ◽  
Strength Concrete ◽  
Concrete Frame ◽  
Capacity Degradation

In this paper, the seismic behavior of fiber-reinforced polymer (FRP) strengthened and unstrengthened steel fiber-reinforced high-strength concrete frame joints under low cyclic loading was tested. Then, the nonlinear finite element program was used to simulate the seismic behavior of FRP strengthened and unstrengthened steel fiber-reinforced high-strength concrete frame joints under low cyclic repeated load. The influence of FRP bond direction on the seismic behavior of steel fiber-reinforced high-strength concrete frame joints was studied. Through the comparison of the test values and numerical simulation values of the hysteretic curve, skeleton curve, energy dissipation capacity, displacement ductility, bearing capacity degradation, stiffness degradation, and other performance indexes of frame joints, the rule was obtained. The results showed that the 45° bonding direction of carbon fiber cloth is better than the 0° bonding direction, and the digital simulation results are in good agreement with the test results. Therefore, the constitutive model, element, end constraint, and loading method used in the finite element numerical simulation of this paper were reasonable, which can provide reference for the similar research in the future.

Experimental Study and Finite Element Analysis of the Seismic Behaviors for Steel Fiber Reinforced High-Strength Concrete Frame Exterior Joints

2011 ◽  
Vol 295-297 ◽  
pp. 1499-1504 ◽  
Author(s):  
Hai Tao Liu ◽  
Ting Yan Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
High Strength ◽  
Experimental Results ◽  
Core Area ◽  
Element Analysis ◽  
Concrete Frame ◽  
Shearing Resistance

Based on the experimental results of three steel fiber reinforced high-strength concrete frame exterior joint under the low cycle loading, the numerical simulation by nonlinear finite element method was adopted to analyze their behaviors and to explore the influence of axial compressive ratio on seismic capacity of the joint. The results indicate that the increase of the axial compressive ratio enhances the restriction role to the joint core area concrete, slows down the degeneration degree of shearing-resistance capacity and stiffness, enhances the shearing-resistance capacity of the core area, the joint ductility and the energy dissipation capacity. The finite element analysis coincides well with the experimental results. In finite element analysis, steel fiber was equated with micro-reinforcement, and then put evenly into the concrete unit. Compared with the test results, the method of taking the steel fiber and concrete as a holistic model was thus validated.

Restriction Effect of Structural Steel to Ultra High Strength Concrete in the Joint Core Area

2014 ◽  
Vol 578-579 ◽  
pp. 576-579
Author(s):  
Chang Wang Yan ◽  
Yong Yang ◽  
Jin Cai Zhu ◽  
Ju Zhang ◽  
Shu Guang Liu
Keyword(s):  
Structural Steel ◽  
High Strength Concrete ◽  
Maximum Stress ◽  
High Strength ◽  
Development Trend ◽  
Analysis Software ◽  
Element Analysis ◽  
Strength Concrete ◽  
Concrete Crack ◽  
Joint Core Area

In this paper, ANSYS finite element analysis software is used to research the restriction effect of steel skeleton to the joint core regions of ultra high strength concrete. The position of concrete crack is given and the crack development trend is explained. The study found the maximum stress position appears at the beam-column joints, and reaches the maximum in the web of “I” shape structural steel.

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