An Experimental Study on the Seismic Behavior of Recycled Concrete Short Columns with Different Stirrup Ratio

2012 ◽  
Vol 256-259 ◽  
pp. 942-948
Author(s):  
Wan Lin Cao ◽  
Hong Ying Dong ◽  
Jian Wei Zhang
Keyword(s):  
Energy Dissipation ◽  
Compression Ratio ◽  
Carrying Capacity ◽  
Seismic Behavior ◽  
Recycled Concrete ◽  
Load Carrying Capacity ◽  
Reinforcing Bars ◽  
Axial Compression Ratio ◽  
Short Columns ◽  
Load Carrying

A comparative study is conducted on the seismic behaviors of five 1/2 scale recycled concrete short columns with 1.75 shear span ratios. The stirrup ratio in the specimens was changed from 0.4%, 0.9%, to 1.29% while the ratio of their longitudinal reinforcement was the same. Crossed reinforcing bars were set in two of the specimens. Cyclic loading test was carried out for the specimens under axial compression ratio 0.4. The stiffness and its degradation, load-carrying capacity, ductility, hysteretic behavior, energy dissipation and failure phenomena of each short column were analyzed. Results show that, with the increase of the stirrup ratio in the specimens, the shear failure of the specimens is getting lighter and lighter. And the load-carrying capacity, ductility, energy dissipation capacity are improved greatly, but the rate of the increase is tending to slow. Moreover, crossed reinforcing bars in the short columns are able to improve the seismic behavior. Recycled concrete can be used for structural columns with low axial compression ratio in earthquake area.

scholarly journals Effect of Stiffener Characteristics on the Seismic Behavior and Fracture Tendency of Steel Shear Walls

2020 ◽  
Vol 14 (54) ◽  
pp. 104-115
Author(s):  
Osman Shallan ◽  
Hassan Maaly ◽  
Mohammed Elgiar ◽  
Alaaeldin Elsisi
Keyword(s):  
Energy Dissipation ◽  
Carrying Capacity ◽  
Seismic Behavior ◽  
High Performance ◽  
Shear Walls ◽  
Plane Wall ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Energy Dissipation Capacity ◽  
Seismic Behaviors

The steel plate shear walls (SPSW) are currently being considered as a lateral load resisting system. A numerical method was proposed to have a comprehensive comparison of seismic behaviors of the plane wall (PW) and stiffened plane wall (SPW) with different stiffener characteristics, having the same weight, by using finite element modeling (FEM). The model was validated by using previously published experimental works. The material and geometric nonlinearity were taken into consideration. In this paper, the effect of using stiffeners with different cross-section shapes and directions will be studied, and key issues, such as load-carrying capacity, stiffness, and energy dissipation capacity, were discussed in depth. It was found that the proposed SPW with horizontal L, T, and U stiffeners could effectively improve load-carrying capacity by about 4, 20, and 23%, respectively. Diagonally and horizontally, SPWs with U stiffeners have higher energy-dissipation capacity than PW by about 57, 50%, respectively. This method provides a combination of high-performance stiffeners form and material for improving the seismic behavior of SPW.

scholarly journals Effect of Different Infill Types and Welding Separation on the Cyclic Behavior of Steel Shear Walls

2021 ◽  
Author(s):  
Osman Shallan ◽  
Hassan M. Maaly ◽  
Mohammed M. Elgiar ◽  
Alaa El-Din Elsisi
Keyword(s):  
Energy Dissipation ◽  
Carrying Capacity ◽  
Seismic Behavior ◽  
Steel Plate ◽  
Shear Wall ◽  
Load Carrying Capacity ◽  
Initial Stiffness ◽  
Steel Plate Shear Wall ◽  
Load Carrying ◽  
Energy Dissipation Capacity

Abstract Currently, the steel plate shear wall (SPSW) is commonly used in high-rise steel buildings as a lateral load resisting system. The SPSW consists of the boundary frame and infill plate. The objectives of this work are to study the effect of same weight different infill plate types, the effect of boundary frame characteristics, and the effect of infill plate weld separation on the seismic behavior of the SPSWs. A numerical method was proposed to have a comprehensive comparison of seismic behaviors of different types of SPSWs, having the same weight. The model was validated by using previously published numerical and experimental works. The study covers unstiffened (USPSW), stiffened (SSPSW), and corrugated steel plate shear wall (CSPSW). Similarly, the effect of boundary frame stiffness and welding separation characteristics between the plate and boundary frame will be studied, and key issues, such as load-carrying capacity, stiffness, and energy-dissipation capacity were discussed deeply. It was found that the SSPSW has better seismic behavior than USPSW and CSPSW. SSPSW has a higher load-carrying capacity than USPSW, and CSPSW by about 14, 24%, respectively. USPSW is more sensitive to the stiffness of the boundary frame than CSPSW. The plate welding separation has a greater impact on the initial stiffness than load-carrying capacity. When plate-column welding separation occurs, the initial stiffness, and the energy dissipation capacity reduces by about 21%, and 14%. Whereas, when the plate-beam separation occurs, the initial stiffness and energy dissipation capacity reduce by about 36%, and 20.5%.

Research on the Joint of Concrete-Filled Steel Tubular Column and Steel Beam

2013 ◽  
Vol 351-352 ◽  
pp. 174-178
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Failure Mechanism ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Strength Degradation ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity

With the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: when reached the ultimate strength, the strength degradation and stiffness degradation of joints are slowly and the ductility is also good, the energy dissipation capacity of joints is much better.

On the Nodes’ Anti-Crack and Load Bearing of SRHC Interior Joint with Different Axial Compression Ratios

2013 ◽  
Vol 351-352 ◽  
pp. 213-218
Author(s):  
Jun Peng ◽  
Dong Xiu Zhang ◽  
Jian Kang Zhang
Keyword(s):  
Energy Dissipation ◽  
Axial Compression ◽  
Compression Ratio ◽  
Stress Transfer ◽  
Ratio Test ◽  
Loading Test ◽  
Axial Compression Ratio ◽  
Foreign Countries ◽  
Load Carrying ◽  
Energy Dissipation Capacity

By testing the seismic performance of the beams and columns of three SRHC with different axial compression ratios, the paper reveals the influence pattern of the nodes’ stress transfer and distribution, cracks’ appearance and development, member deformation, destruction pattern and mechanism, energy dissipation capacity etc., in SRHC with different axial compression ratios. The test shows that the increase of axial compression ratio postpones the appearance of the diagonal cracks in the nodes area, and slows down moderately the speed of development of the diagonal cracks, and improves the nodes’ energy dissipation capacity and ductility etc. this article studies its crack resistance and bearing capacity only. The purpose of this test is, through the low cyclic loading test of the nodes in the beams and columns of three SRHC with different axial compression ratios, to investigate the axial compression ratio’ influence on the cracks’ appearance, development, destruction pattern and deformation characteristics in the nodes; to analyze of the factors influencing the load-carrying capability; to validate the calculation methods proposed by related studies, which is little studied by foreign countries. This paper, based on the analysis of axial compression ratio test, further validates and improves the theory and methods proposed in the literature.

Research on the Seismic Behavior of Concrete-Filled Steel Tubular Column and Steel Beam Joint

2012 ◽  
Vol 204-208 ◽  
pp. 2528-2532
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Earthquake Action ◽  
Energy Dissipation Capacity ◽  
Strength And Stiffness

Joints are the forces cross points of members, and the bearing modes are more complex than other members, especially under earthquake action, so the rationality of joints are directly related to the safe reliability of structure. By the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: the energy dissipation capacity of joints is much better, the degradation of strength and stiffness are slowly when reached the ultimate strength, and the ductility is also good.

Research on Behavior of Ultra-High Toughness Cementitious Composites Reinforced Frame Joints

2011 ◽  
Vol 71-78 ◽  
pp. 794-798
Author(s):  
Jun Su ◽  
Shi Lang Xu ◽  
Dong Tao Xia
Keyword(s):  
Energy Dissipation ◽  
Carrying Capacity ◽  
Experimental Analysis ◽  
Experimental Results ◽  
Hysteretic Behavior ◽  
Cementitious Composites ◽  
Load Carrying Capacity ◽  
High Toughness ◽  
Load Carrying ◽  
Axial Compressive Ratio

In this article, through the seismic experimental analysis for six frame joints of ultra-high toughness cementitious composites, the load-carrying capacity, hysteretic behavior, energy dissipation and ductility of new joints are studied under different axial compressive ratio and the stirrups space. The experimental results show that the UHTCC joints have higher anti-cracking capacity and shear ductility. The UHTCC can reduce or even eliminate the amount of shear stirrups of the joint core. According to the analysis for the experiments, a theoretical calculating formula of shearing capacity is presented, whose calculating results agree well with the experimental results.

Experimental Study on Seismic Performance of Steel Reinforced Recycled Concrete Column

2014 ◽  
Vol 501-504 ◽  
pp. 1580-1586
Author(s):  
Jian Yang Xue ◽  
Jian Peng Lin ◽  
Hui Ma
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Seismic Performance ◽  
Compression Ratio ◽  
Recycled Concrete ◽  
Recycled Aggregate ◽  
Concrete Column ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity

The pseudo-static tests were carried out on seven steel reinforced recycled concrete columns. The main parameters of specimens were recycled aggregate replacement ratio, axial compression ratio and volumetric stirrup ratio. The results indicate that the incorporation of recycled aggregate doesnt reduce the horizontal bearing capacity, ductility and the energy dissipation capacity of specimens and has little effect on seismic performance. The seismic performance of steel reinforced recycled concrete column decreases significantly in the high axial compression ratio. The ductility, horizontal bearing capacity and the energy dissipation capacity of the steel reinforced recycled concrete column increase with a rise in the volumetric stirrup ratio. This study provides a reference on the application of the steel reinforced recycled concrete column.

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