scholarly journals Hysteretic Behavior on Asymmetrical Composite Joints with Concrete-Filled Steel Tube Columns and Unequal High Steel Beams

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2381
Author(s):  
Jing Ji ◽  
Wen Zeng ◽  
Liangqin Jiang ◽  
Wen Bai ◽  
Hongguo Ren ◽  
...  
Keyword(s):  
Peak Load ◽  
Constitutive Models ◽  
Steel Tube ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Steel Beams ◽  
Composite Joints ◽  
Statistical Regression ◽  
Concrete Filled Steel Tube ◽  
Composite Joint

In order to acquire the hysteretic behavior of the asymmetrical composite joints with concrete-filled steel tube (CFST) columns and unequal high steel beams, 36 full-scale composite joints were designed, and the CFST hoop coefficient (ξ), axial compression ratio (n0), concrete cube compressive strength (fcuk), steel tube strength (fyk), beam, and column section size were taken as the main control parameters. Based on nonlinear constitutive models of concrete and the double broken-line stress-hardening constitutive model of steel, and by introducing the symmetric contact element and multi-point constraint (MPC), reduced-scale composite joints were simulated by ABAQUS software. By comparing with the test curves, the rationality of the modeling method was verified. The influence of various parameters on the seismic performance of the full-scale asymmetrical composite joints was investigated. The results show that with the increasing of fcuk, the peak load (Pmax) and ductility of the specimens gradually increased. With the increasing of n0, the Pmax of the specimens gradually increases firstly and then gradually decreases after reaching a peak point. The composite joints have good energy dissipation capacity and the characteristic of stiffness degradation. The oblique struts force mechanism in the full-scale asymmetrical composite joint domain is proposed. By introducing influence coefficients (ξ1 and ξ2), the expression of shear bearing capacity of composite joints is obtained by statistical regression, which can provide theoretical support for the seismic design of asymmetrical composite joints.

scholarly journals Bearing Behavior of H-Shaped Honeycombed Steel Web Composite Columns with Rectangular Concrete-Filled Steel Tube Flanges under Eccentrical Compression Load

2022 ◽  
Vol 2022 ◽  
pp. 1-21
Author(s):  
Jing Ji ◽  
Chenyu Yu ◽  
Liangqin Jiang ◽  
Jiedong Zhan ◽  
Hongguo Ren ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Bearing Capacity ◽  
Slenderness Ratio ◽  
Steel Tube ◽  
Full Scale ◽  
Fe Model ◽  
Statistical Regression ◽  
Concrete Filled Steel Tube ◽  
Compression Load ◽  
Composite Columns

In order to investigate the bearing capacity of H-shaped honeycombed steel web composite columns with rectangular concrete-filled steel tube flanges (STHCCs) subjected to eccentrical compression load, 33 full-scale STHCCs were designed with the eccentricity(e), the slenderness ratio (λ), the cubic compressive strength of concrete(fcuk), the thickness of the steel tube flange (t1), the thickness of honeycombed steel web (t2), diameter-depth ratio (d/hw), space-depth (s/hw), and the yield strength of the steel tube (fy) as the main parameters. Considering the nonlinear constitutive model of concrete and simplified constitutive model of steel, the finite element (FE) model of STHCCs was established by ABAQUS software. By comparison with the existing test results, the rationality of the constitutive model of materials and FE modeling was verified. The numerical simulation of 33 full-scale STHCCs was conducted, and the influence of different parameters on the ultimate eccentrical compression bearing capacity was discussed. The results show that the cross-sectional stress distribution basically conforms to the plane-section assumption. With the increase in e, λ, and d/hw, the ultimate eccentrical compression bearing capacity of the full-scale STHCCs decreases, whereas it gradually increases with the increase in fcuk, t1, t2, s/hw, and fy. By introducing bias-stress stability coefficient (φ), the calculation formula of full-scale STHCCs under eccentrical compression is proposed by statistical regression, which can lay a foundation for the popularization and application of these types of composite columns in practical engineering.

scholarly journals Investigating the Hysteretic Behavior of Concrete-Filled Steel Tube Arch by Using a Fiber Beam Element

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jun Ma ◽  
Yang Liu ◽  
Qingfei Gao ◽  
Kang Hou
Keyword(s):  
Experimental Data ◽  
Transverse Direction ◽  
Vertical Direction ◽  
Beam Element ◽  
Steel Tube ◽  
Hysteretic Behavior ◽  
Constitutive Relationship ◽  
Concrete Filled Steel Tube ◽  
Hysteretic Performance ◽  
Fiber Beam Element

A fiber beam finite element that could account for the nonlinear constitutive relationship between steel and concrete was applied to investigate the hysteretic behavior of concrete filled steel tube (CFT) arch ribs of bridges. At first, the effectiveness of this fiber beam element using for nonlinear analysis was verified by comparing the analytical results with the experimental data, and then this composite element was applied to analyze the hysteretic performance of CFT arch ribs. The following hysteretic behavior of CFT arch ribs of bridges was investigated such as the hysteretic behaviors of moment-curvature of arch ribs in vertical direction of bridge and the hysteretic relationship between load and displacement of arch ribs in longitudinal and transverse direction of bridge. Finally, some parameters affecting the hysteretic behaviors of CFT arch ribs were presented by evaluating the capacity of ductility of CFT arch ribs.

Finite Element Analysis on Behavior of the Joint with Steel Tube Confined Concrete (STCC) Column to Reinforced Concrete Beam

2011 ◽  
Vol 243-249 ◽  
pp. 527-530 ◽  
Author(s):  
Wen Da Wang ◽  
Zhi Feng Guo ◽  
Yan Li Shi
Keyword(s):  
Finite Element ◽  
Mechanical Performance ◽  
Material Model ◽  
Element Model ◽  
Reinforced Concrete Beam ◽  
Steel Tube ◽  
Confined Concrete ◽  
Composite Joints ◽  
Element Analysis ◽  
Composite Joint

The steel tube confined concrete (STCC) column exhibits excellent mechanical performance. A 3-D finite element model (FEM) using ABAQUS was established to simulate the performance of the composite joints with STCC column and RC beam. Accurate material model, rational element type, and solution method were discussed. Some STCC columns and composite joints with concrete-filled steel tubular (CFST) column and STCC column were modeled based on the model, respectively. The results from FEM are good agreement with the test results. The mechanism of the composite joint was investigated based on the FEM.

Numerical study on the performance of beam-to-concrete-filled steel tube column joint with adapter-bracket

2017 ◽  
Vol 21 (10) ◽  
pp. 1542-1552 ◽  
Author(s):  
Shiming Chen ◽  
Junming Jiang ◽  
Liangjiu Jia
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
High Strength ◽  
Steel Tube ◽  
Initial Stiffness ◽  
Element Analysis ◽  
Moment Capacity ◽  
Concrete Filled Steel Tube ◽  
Composite Joint ◽  
Flange Thickness

An innovative beam-to-column composite joint with adapter-bracket was proposed and its behavior was investigated through finite element analysis. The special adapter-bracket is to facilitate the assembly of the steel box beam and the concrete-filled steel tube column through high-strength blind bolts. In the adapter-bracket, two endplates are welded to the beam and bolted to the column, respectively. First, two finite element models of the bolted extended endplate joint were developed in ABAQUS and validated by available experimental results. Then, based on modified models, parametric analyses were conducted to evaluate the novel joint performance, in terms of the initial stiffness, rotation capacity, moment capacity, failure mode, and joint classification. The variables included flange thickness, endplate thickness, and bolt size. Results demonstrated that the joint behavior was significantly affected by the flange thickness, the endplate-A thickness, and bolt size while slightly influenced by the endplate-B thickness. Additionally, these joints had favorable rotation and moment capacity.

Seismic Performance on Dumbbell-Shape Connection between Steel Beams and Rectangular Concrete-Filled Tubular Column

2010 ◽  
Vol 163-167 ◽  
pp. 4546-4554
Author(s):  
Xiu Li Wang ◽  
Qiong Li
Keyword(s):  
Plastic Hinge ◽  
Steel Tube ◽  
Hysteretic Behavior ◽  
Steel Beams ◽  
Strength Deterioration ◽  
Design Concepts ◽  
Weak Beam ◽  
Force Transfer ◽  
Connection Type ◽  
Force Transfer Mechanism

Referancing to the connection characteristic and mechanical behavior as well as the defects in application of joints on concrete-filled steel tube between columns and beams, a new connection type of steel beam throughout joints model is proposed. The inner force transfer mechanism and stress distribution situation of the joint under the monotonous load and hysteretic behavior, ductility, energy dissipation under cyclically lateral load are analyzed using the software ANSYS. The result indicated that the stress of steel pipe is reduced effectively when continious web plate joint is used. Meanwhile, the rigidity of the joint is enhancedand. It is also accord with the seismic design concepts, that is “strong column-weak beam“. During this process of the jiont working, plastic hinge occurs out of joint area on the beam. The hysteretic curves of all the specimens are of a plump shuttle shape .The curves don’t show strength deterioration and stiffness degradation obviously. All these show that this type of joint is effective.

Research on Behavior of Composite Joints Consisting of Concrete and Steel

2012 ◽  
Vol 166-169 ◽  
pp. 815-818 ◽  
Author(s):  
Jin Jie Men ◽  
Zhi Feng Guo ◽  
Qing Xuan Shi
Keyword(s):  
Reinforced Concrete ◽  
Material Model ◽  
Element Model ◽  
Steel Tube ◽  
Steel Beam ◽  
Composite Joints ◽  
Test Results ◽  
Composite Joint ◽  
Element Type ◽  
Good Agreement

A 3-D finite element model (FEM) using ABAQUS was established to simulate the performance of the composite joints with reinforced concrete and steel. Accurate material model, element type, and solution method were discussed in the model. Some composite joints, concrete-filled steel tubular (CFST) column to steel beam, steel tube confined concrete (STCC) column to reinforced concrete (RC) beam and reinforced concrete (RC) column to steel beam were modeled based on the model, respectively. The results from FEM are good agreement with the test results. The mechanism of the composite joint was investigated based on the FEM.

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