Analysis on hysteretic behavior of composite frames with concrete-encased CFST columns

2017 ◽  
Vol 135 ◽  
pp. 176-186 ◽  
Author(s):  
Kun Wang ◽  
Xiao-Feng Lu ◽  
Shen-Feng Yuan ◽  
Da-Fu Cao ◽  
Zai-Xian Chen
Keyword(s):  
Hysteretic Behavior ◽  
Composite Frames ◽  
Cfst Columns

Experimental study on hysteretic behavior of composite frames with concrete-encased CFST columns

2016 ◽  
Vol 123 ◽  
pp. 110-120 ◽  
Author(s):  
Kun Wang ◽  
Shen-Feng Yuan ◽  
Zai-Xian Chen ◽  
Hai-Xiang Zhi ◽  
Gao-Lin Shi ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hysteretic Behavior ◽  
Composite Frames ◽  
Cfst Columns

scholarly journals Performances of moment resisting frames with slender composite sections in low-to-moderate seismic areas

2018 ◽  
Author(s):  
Hervé Degée ◽  
Yves Duchêne ◽  
Benno Hoffmeister
Keyword(s):  
Numerical Model ◽  
Global Analysis ◽  
Local Buckling ◽  
Experimental Tests ◽  
Hysteretic Behavior ◽  
Moderate Intensity ◽  
Moment Resisting Frames ◽  
Composite Frames ◽  
Moderate Seismicity ◽  
Moment Resisting

The aim of the recently completed European research program Meakado is therefore to study design options with requirements proportioned to the actual seismic context of constructions in areas characterized by a low or moderate seismic hazard, contrary to most researches aiming at maximizing the seismic performances. In this general framework, specific investigations have been carried out regarding typical beam profiles commonly used for multi-bay - multi-storey composite frames. In a first stage, experimental tests on class-3 composite beam-to-column connections were performed. The measurement results were evaluated with regard to the development of the hysteretic behavior with particular emphasis on the degradation. These test results have been used as reference for the calibration and validation of numerical model aiming at extending the scope of the experimental outcomes through appropriate parametric variations regarding the behavior of nodal connections as well as towards the global analysis and behavior of structures made of class 3 and 4 profiles. Numerical investigations of the global performance of composite frames with slender cross-sections are then performed resorting to the numerical model previously calibrated with respect to the experimental tests and additional simulations at node level. Results are compared to the performance of an equivalent frame made of compact steel profiles. Attention is paid to the effects of strength and stiffness degradation due to local buckling. The analysis of the results is specifically focusing on the comparison of the rotation capacity of the slender section with the actual rotation demand imposed by a moderate intensity earthquake. Based on the outcomes of these investigations, practical design recommendations are finally derived for multi-storey, multi-bay moment resisting frames with type b (full composite action) beam-to column connections located in low and moderate seismicity regions. 

scholarly journals Seismic Damage Investigation of Spatial Frames with Steel Beams Connected to L-Shaped Concrete-Filled Steel Tubular (CFST) Columns

2018 ◽  
Vol 8 (10) ◽  
pp. 1713 ◽  
Author(s):  
Jicheng Zhang ◽  
Yong Li ◽  
Yu Zheng ◽  
Zhijie Wang
Keyword(s):  
Finite Element ◽  
Frame Structures ◽  
Steel Beams ◽  
Element Analysis ◽  
Testing Specimen ◽  
Tubular Columns ◽  
Finite Element Software ◽  
Fea Model ◽  
Composite Frames ◽  
Cfst Columns

Currently, the frame structures with special-shaped concrete-filled steel tubular columns have been widely used in super high-rise buildings. Those structural members can be used to improve architectural space. To investigate the seismic behavior of spatial composite frames that were constructed by connecting steel beams to L-shaped concrete-filled steel tubular (CFST) columns, a finite element analysis (FEA) model using commercial finite element software ABAQUS was proposed to simulate the behavior of the composite spatial frames under a static axial load on columns and a fully-reversed lateral cyclic load applied to frames in this paper. Several nonlinear factors, including geometry and material properties, were taken into account in this FEA model. Four spatial specimens were designed, and the corresponding experiments were conducted to verify the proposed FEA model. Each testing specimen was two-story structure consisting of eight single span steel beams and four L-shaped CFST columns. The test results showed that the proposed FEA model in this paper could evaluate the behavior of the composite spatial frames accurately. Based on the results of the nonlinear analysis, the stress developing progress of columns is investigated. The load transferring mechanism and failure mechanism are also determined. The results are discussed and conclusions about the behavior of those spatial frame structures are presented.

FRC-Steel Joist Composite Frames for Seismic Resistance

1999 ◽  
Vol 15 (1) ◽  
pp. 87-104
Author(s):  
Madhusudan Khuntia ◽  
Subhash C. Goel
Keyword(s):  
Shear Capacity ◽  
Fiber Reinforced Concrete ◽  
Hysteretic Behavior ◽  
Seismic Resistance ◽  
Shear Connectors ◽  
Weak Beam ◽  
Composite Frames ◽  
Innovative System ◽  
Reversed Cyclic ◽  
Open Web Steel Joist

The research reported in this paper is concerned with development of fiber-reinforced concrete-encased open web steel joist composite frames for seismic resistance. This new and innovative system completely eliminates the need for any shear connectors between steel joists and surrounding concrete as well as that for conventional longitudinal and transverse reinforcement, all of which are quite labor intensive. In the initial phase of the study tests were carried out on half-scale beam specimens subjected to monotonic and reversed cyclic loading. The results showed that the presence of steel fibers as well as the open web steel significantly enhances the shear capacity of the system thus making it very suitable for seismic resistance. In the final phase, a half-scale, one-story, one-bay frame was designed by strong column-weak beam concept. The results showed ductile and stable hysteretic behavior. The study indicates that this type of composite framing system has excellent potential in seismic regions.

Preliminary Research on Effective Length of Concrete Filled Steel Tubular Columns in Sway Frame

2012 ◽  
Vol 446-449 ◽  
pp. 318-321
Author(s):  
Yan Li Shi ◽  
Feng Wang ◽  
Wen Da Wang
Keyword(s):  
Steel Structure ◽  
Current Approach ◽  
Effective Length ◽  
Steel Beams ◽  
Engineering Practice ◽  
Tubular Columns ◽  
Composite Frames ◽  
Composite Frame ◽  
Cfst Columns ◽  
Linear Buckling Analysis

The effective length of concrete filled steel tubular (CFST) frame columns is a key parameter to determine its ultimate strength for engineering design. There was no special design code, so engineers usually got the values according with specification for steel structure. This may cause error in some degree. Based on liner and non-linear buckling analysis respectively, the overall stability of a typical planar composite frame with CFST columns and steel beams was performed in this paper. By comparing the results of finite element method with current approach, some primary conclusions were given to refer for engineering practice on the composite frames.

EXPERIMENTAL STUDY ON CONTINUOUS BEAM TYPE SQUARE CFST BEAM-TO-COLUMN CONNECTION

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Takashi Fujinaga ◽  
Charles G. Clifton
Keyword(s):  
Load Transfer ◽  
Type Specimen ◽  
High Energy ◽  
Local Deformation ◽  
Hysteretic Behavior ◽  
Continuous Beam ◽  
Moment Capacity ◽  
Beam Type ◽  
High Energy Absorption ◽  
Cfst Columns

Concrete-filled steel tubular (CFST) columns are used widely as building structure components because of their good performance. It can be complex, however, to connect beams into CFST columns, especially when rigid beam-to-column connections are required. In order to simplify the fabrication requirements and cost of these connections, a continuous beam type connection through the column is proposed. This can develop the full plastic moment capacity of the beam. In this paper, the experiment testing results of two types of CFST beam-to-column connection specimens are presented and the connection performance and load transfer mechanisms are examined. The continuous beam type connection performance is compared to that of traditionally used through-diaphragm type of connection, which is more complex and demanding to fabricate. Both specimens showed good seismic performance, exhibiting stable hysteretic behavior with high energy absorption. The maximum experimental strength exceeded the calculated value. For a continuous beam type specimen, there is the potential for the column flange to be affected by the local deformation from the steel beam under bending induced beam tension. However, such effects were not observed in practice until late in the test after extensive beam plastic action had occurred.

Review of Nonlinear Analysis and Modeling of Steel and Composite Structures

2020 ◽  
Vol 20 (04) ◽  
pp. 2030003 ◽  
Author(s):  
Huu-Tai Thai ◽  
Trung-Kien Nguyen ◽  
Seunghye Lee ◽  
Vipulkumar Ishvarbhai Patel ◽  
Thuc P. Vo
Keyword(s):  
Composite Structures ◽  
Steel Structures ◽  
Composite Frames ◽  
Inelastic Analysis ◽  
Analysis Methods ◽  
Direct Design ◽  
Mixed Beam ◽  
Advanced Analysis ◽  
Cfst Columns ◽  
Displacement Based

Structural steel frames exhibit significantly geometric and material nonlinearities which can be captured using the second-order inelastic analysis, also known as advanced analysis. Current specifications of most modern steel design codes, e.g. American code AISC360, European code EC3, Chinese code GB50017 and Australian code AS4100 permit the use of advanced analysis methods for the direct design of steel structures to avoid tedious member capacity checks. In the past three decades, a huge number of advanced analysis and modeling methods have been developed to predict the behavior of steel and composite frames. This paper presents a comprehensive review of their developments, which focus on beam-column elements with close attention to the way to capture geometric and material nonlinearity effects. A brief outline of analysis methods and analysis tools for frames was presented in the initial part of the paper. This was followed by a discussion on the development of displacement-based, force-based and mixed beam elements with distributed plasticity and concentrated plasticity models. The modeling of frames subjected to fire and explosion was also discussed. Finally, a review of the beam-column models for composite structures including concrete-filled steel tubular (CFST) columns, composite beams and composite frames was presented.

Preliminary Analysis on Progressive Collapse of Composite Frames with Concrete-Filled Steel Tubular Columns

2011 ◽  
Vol 243-249 ◽  
pp. 531-535
Author(s):  
Yan Li Shi ◽  
Xiao Yan Zhou ◽  
Wen Da Wang
Keyword(s):  
Preliminary Analysis ◽  
State Of The Art ◽  
Progressive Collapse ◽  
Steel Structures ◽  
Chain Reaction ◽  
Tubular Columns ◽  
Composite Frames ◽  
Composite Frame ◽  
Cfst Columns ◽  
A Chain

Progressive collapse is a chain reaction of failure that relates local damage to large disproportional scale collapse in a structure. At present the research against progressive collapse focused on reinforced concrete (RC) and steel structures. This paper presented the state-of-the-art of study on progressive collapse of structures. A preliminary analysis on the progressive collapse of a typical planar composite frame with concrete-filled steel tubular (CFST) columns was performed using ABAQUS. Some general conclusions were given to refer for the further research on the composite frames.

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