Fiber‐based hysteretic model for simulating strength and stiffness deterioration of steel hollow structural section columns under cyclic loading

2020 ◽  
Vol 49 (15) ◽  
pp. 1702-1720
Author(s):  
Yusuke Suzuki ◽  
Dimitrios G. Lignos
Keyword(s):  
Cyclic Loading ◽  
Hysteretic Model ◽  
Strength And Stiffness ◽  
Hollow Structural Section

scholarly journals A HYSTERETIC MODEL OF LATERALLY UNSUPPORTED H-SHAPED STEEL BEAMS UNDER CYCLIC LOADING

2015 ◽  
Vol 80 (711) ◽  
pp. 819-829 ◽  
Author(s):  
Hideki IDOTA ◽  
Hirokazu NAKATA ◽  
Takuya YOSHIDA ◽  
Tetsuro ONO
Keyword(s):  
Cyclic Loading ◽  
Steel Beams ◽  
Hysteretic Model

Strength and Stiffness Degradation of Carbon Fiber Reinforced Plastic under Cyclic Loading under Membran-, Shear- and Bending Loading

2015 ◽  
Vol 825-826 ◽  
pp. 968-975
Author(s):  
Peter Haefele ◽  
Oscar Herrera
Keyword(s):  
Carbon Fiber ◽  
Cyclic Loading ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Operational Conditions ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Strength And Stiffness ◽  
Bending Loading

In order to meet the increasing lightweight requirements, the application of fiber reinforced plastics is indispensable. To ensure the structural durability of the car or machine under operational conditions, it is essential to know the long term behavior of carbon fiber reinforced plastic material (CFRP) under the numerous influencing factors under fatigue loading. For a reliable safety assessment of the car structure under operational conditions, the degradation of the stiffness and of the static strength after a certain damage due to cyclic loading is of particular importance. The paper covers the loss of stiffness and remaining strength as a function of fatigue damage for specimen and components under membrane, shear and bending loading. The tests are done using different layer set-ups (unidirectional, angle ply, quasiisotropic) and various loading conditions (membrane, shear and bending loading). In order to account for the transferability, the tests are carried out using specimen and components (hat sections). Both specimen and components show a significant loss in strength and stiffness.

Seismic Behavior of RC Beam to Partially Steel Tubed Concrete (PSTC) Column Joints Under High Axial Load and Cyclic Loading

2016 ◽  
Vol 16 (01) ◽  
pp. 1640015 ◽  
Author(s):  
Yun Tian Wu ◽  
Yu Shan Fu ◽  
Chong-Ming Dai
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Axial Load ◽  
Deformation Energy ◽  
Rc Beam ◽  
Weak Beam ◽  
Column Joint ◽  
Energy Dissipation Capacity ◽  
Beam Mechanism ◽  
Strength And Stiffness

A new type of partially steel tubed concrete (PSTC) column is proposed that is suitable to be used in new high rise reinforced concrete (RC) buildings. Three exterior joint specimens consisting of RC beams and PSTC columns and two exterior RC joint specimens were designed and tested under high axial load and cyclic loading to investigate the joint behavior in terms of failure pattern, hysteresis response, deformation, energy dissipation capacity and degradation of strength and stiffness. Test results indicate that the PSTC column can benefit the performance of the joint in terms of strength, ductility and energy dissipation capacity and can partly compensate for the unfavorable effect induced by slab. The strong column–weak beam mechanism can also be ensured in RC beam to PSTC column joint.

Deformation Behavior and Strength of Beam-To-Column Connections in Steel Portal Frame

2007 ◽  
Vol 353-358 ◽  
pp. 675-678
Author(s):  
Young Moon Kim ◽  
Cheol Min Yang ◽  
Nag Ho Ko ◽  
Dong Pyo Hong
Keyword(s):  
Cyclic Loading ◽  
Deformation Behavior ◽  
Careful Consideration ◽  
Test Reliability ◽  
Cyclic Behavior ◽  
Connection Strength ◽  
Portal Frame ◽  
Strength And Stiffness ◽  
Welded Connection ◽  
Angle Connection

This paper presents an experimental work on the cyclic behavior of bolted and welded beam-to-column connections in steel portal frame. Three types of connection were used; tests for each specimen were performed twice in order to maintain test reliability. Specimen 1 (DWA) had only a double web angle connection, specimen 2 (TSD) had a top and seat angles with double web angle connection, and specimen 3 (FW) had a fully welded connection. All specimens were tested under cyclic loading conditions in order to simulate the effects of earthquakes. We also conclude that with appropriate design and careful consideration of connection strength and stiffness, the steel project economy may be maximized.

Behaviour of Stud Shear Connectors Subjected to Bi-Directional Cyclic Loading

2003 ◽  
Vol 6 (1) ◽  
pp. 65-75 ◽  
Author(s):  
R. Seracino ◽  
D. J. Oehlers ◽  
M. F. Yeo
Keyword(s):  
Fatigue Life ◽  
Cyclic Loading ◽  
Cyclic Fatigue ◽  
Fatigue Behaviour ◽  
Shear Connectors ◽  
Rate Of Increase ◽  
Strength And Stiffness ◽  
Almost All ◽  
Existing Structure ◽  
Do So

Almost all stud shear connectors in composite steel-concrete bridge beams are subjected to bi-directional cyclic loading at some stage during the fatigue life of the structure. In the assessment of an existing structure, it is desirable to predict the extent of fatigue damage experienced by the stud shear connectors as accurately as possible as this component of the structure can not be visually inspected. However, very little research has been carried out to quantify the fatigue behaviour of stud shear connectors subjected to bi-directional cyclic loading. This paper presents a new push-pull specimen that was developed to provide a better understanding of the bidirectional cyclic fatigue behaviour of stud shear connectors. The tests confirmed that for a given range of load, the fatigue life of connectors subjected to bi-directional cyclic loading is longer than those subjected to unidirectional loads only, and that the strength and stiffness of the connectors reduce immediately upon cyclic loading and continues to do so throughout the fatigue life. It was also shown that the rate of increase in slip per cycle is constant over most of the fatigue life with a rapid increase near the end so that, if monitored, can be used to provide adequate warning of failure.

Research on Hysteretic Model of SRHSHPC Frame Joints Considering Accumulative Damage

2010 ◽  
Vol 450 ◽  
pp. 227-230
Author(s):  
Shan Suo Zheng ◽  
Fei Yu ◽  
Bin Wang ◽  
Hong Ren Zhang ◽  
Yi Hu
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Damage Index ◽  
High Strength ◽  
Stiffness Degradation ◽  
Hysteretic Model ◽  
Scale Models ◽  
Reversed Loading ◽  
Strength And Stiffness ◽  
Reduced Scale

To reflect the effects of accumulative damage of steel reinforced high strength and high performance concrete (SRHSHPC) frame joints on its mechanical properties such as strength and stiffness degradation under reversed load, a damage index (D) is introduced into hysteretic model of SRHSHPC frame joints. Then a trilinear load-displacement hysteretic model of SRHSHPC frame joints considering accumulative damage is proposed, which can reveal strength and stiffness degradation of SRHSHPC frame joints. Five 1:4 reduced-scale models of SRHSHPC frame joints were constructed and subjected to low cyclic reversed loading to gain the value of those parameters in the D. The calculated results tally with the experimental results well, and it is showed that the proposed hysteretic model considering accumulative damage has a considerable precision.

Finite Element Analysis of Concrete-Filled Rectangular Steel Tubular Y-Connections under Tension

2014 ◽  
Vol 1065-1069 ◽  
pp. 2095-2098
Author(s):  
Gao Cheng ◽  
Yong Jian Liu ◽  
Peng Tang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Steel Truss ◽  
Strength And Stiffness ◽  
Hollow Structural Section

Rectangular steel truss Y-connections, whose chord is filled in concrete, is described. The behavior of Y-connections include hollow structural section and concrete-filled section loaded in tension is analyzed by means of finite element analysis. It is shown that there is a significant improvement in strength and stiffness of Y-connections with concrete-filled chord.

Experimental study of as-built and composite materials retrofitted reinforced concrete columns

2005 ◽  
Vol 32 (2) ◽  
pp. 454-460 ◽  
Author(s):  
Shuenn-Yih Chang ◽  
I-Chau Tsai
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Carbon Fibre ◽  
Seismic Design ◽  
Concrete Columns ◽  
Loading Test ◽  
General Design ◽  
Cyclic Loading Test ◽  
Design Requirements ◽  
Strength And Stiffness

Four full-size reinforced concrete columns as used in school buildings were cast and tested under reversed cyclic loading. Test results of the two as-built columns confirm that the hysteresis behaviours of a column are considerably improved if special seismic design provisions are used in addition to general design requirements instead of using general design requirements only. Although lateral strength and stiffness are not increased, ductility increases and pinching decreases in hysteretic loops. It is also found that the column conformed to general design requirements can be effectively retrofitted by wrapping with either carbon fibre fabrics or carbon fibre reinforced polymer (CFRP) L-shaped plates if its lateral confinement is upgraded to the same level as that designed based on special seismic design provisions. This retrofitting of lateral confinement is effective at improving the ductility of a column and mitigating the strength degradation, stiffness degradation, and pinching in the hysteretic loops, although the strength and stiffness of the column are not increased.Key words: CFRP L-shaped plate, carbon fibre fabric, retrofit, cyclic loading test.

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