Effect of axial compression ratio on dynamic mechanical properties of RC beam–column joints

This article researches seismic performance of the joint of cellular steel column and steel beam through simulation of the finite element software. With the change of axial force, we can attain the load-displacement hysteretic curves, skeleton curves under the different axial compression ratio, and then analyze their bearing capacity, ductility, energy dissipation and other mechanical properties. Results show that, the decrease of axial compression ratio is helpful to improve the bearing capacity of specimens. The joints of cellular steel column and steel beam have full hysteretic curve, good ductility and seismic performance.

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Numerical Simulation of Mechanical Properties of Series System with Bearing and Pier Under Lateral Load

The Baltic Journal of Road and Bridge Engineering ◽

10.7250/bjrbe.2021-16.517 ◽

2021 ◽

Vol 16 (1) ◽

pp. 91-117

Author(s):

Zhenhua Dong ◽

Jinquan Zhang ◽

Shoushan Cheng ◽

Pengfei Li

Keyword(s):

Mechanical Properties ◽

Numerical Simulation ◽

Shear Deformation ◽

Axial Compression ◽

Compression Ratio ◽

Horizontal Load ◽

Series System ◽

Horizontal Force ◽

Axial Compression Ratio ◽

Adjacent Structure

The local series system with typical common plate rubber support/pier in highway reinforced concrete girder bridge is the object of the current research. The finite element numerical simulation method is used to study sensitive parameters – the mechanical properties of the series system under the horizontal load. The simulated results show that the interface bonding strength between the bearing and adjacent structure is reduced; the equivalent shear deformation and the horizontal force of bearing under horizontal load change insignificantly with the increase of horizontal displacement. However, the total shear deformation and equivalent shear deformation increase with the increase of the axial compression ratio. In addition, the top horizontal force and displacement of the pier significantly decrease with reduction of the connection strength at both ends of the bearing. Therefore, adjusting the axial compression ratio of the pier and interfacial connection mode can obviously affect the mechanical properties of the support and adjacent structure, even the failure mode of the local structure. This approach can help estimate the mechanical properties of the existing bridge and determine the reasonable maintenance plan.

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Study of Seismic Behavior of RC Beam-Column Joints Strengthened by Sprayed FRP

Advances in Materials Science and Engineering ◽

10.1155/2018/3581458 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Zhao Yang ◽

Yong Liu ◽

Jiajia Li

Keyword(s):

Bearing Capacity ◽

Axial Compression ◽

Compression Ratio ◽

Seismic Behavior ◽

Failure Modes ◽

Rc Beam ◽

Initial Stiffness ◽

Axial Compression Ratio ◽

Energy Dissipation Capacity ◽

Strength And Stiffness

To study the seismic behavior of RC beam-column joints strengthened with sprayed FRP, five 1 : 2 reduced-scale specimens of joints were tested through quasi-static experiments. The failure modes, hysteretic curves, skeleton curves, strength, deformation, degradation of strength and stiffness, ductility, and energy dissipation capacity were studied. Furthermore, the effect of three main influencing factors including the sprayed FRP thickness, strengthened area, and axial compression ratio was analyzed in this paper as well. The results show that sprayed FRP strengthening can improve the seismic behavior of RC beam-column joints effectively. The increase of sprayed FRP thickness can lead to a better seismic performance for the joints. Strengthening area can affect the bearing capacity obviously. Higher axial compression ratio can increase the bearing capacity and initial stiffness, but it can make the deformation capacity and ductility decreased. The study can provide references to further research on the sprayed FRP material for strengthening of RC beam-column joints.

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Experimental Study on Shear Behavior of Mid-rise Assembled Monolithic Concrete Shear Walls with Varying Axial Compression Ratio

The Open Civil Engineering Journal ◽

10.2174/1874149501711010972 ◽

2017 ◽

Vol 11 (1) ◽

pp. 972-979

Author(s):

Muhe Liu ◽

Jiliang Liu ◽

Guangming Qiu ◽

Gang Wang ◽

Mingjin Chu

Keyword(s):

Mechanical Properties ◽

Axial Compression ◽

Compression Ratio ◽

Brittle Failure ◽

Shear Walls ◽

Shear Capacity ◽

Initial Stiffness ◽

Static Tests ◽

Axial Compression Ratio ◽

New Type

Objective: Quasi-static tests of three mid-rise assembled monolithic concrete shear walls, whose aspect ratio is 2.0, were completed in this paper. The failure mode of three new-type shear walls and the effect of axial compression ratio were studied. Result and Conclusion: The result showed that the brittle failure was extinct, and the new-type shear walls had good deformability whose ductility factors were over 4.3. The axial compression ratio had significant influence on the mechanical properties of the new-type shear walls. As the increscent of the axial compression ratio, the shear capacity and initial stiffness were improved, but the energy-dissipating capacity became worst.

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